JP2008277962A - Optical receiver - Google Patents

Abstract

An optical receiver capable of easily and flexibly responding to a service used by a user and capable of easily expanding the service or the like.
An optical receiver includes an access network optical connection termination unit that terminates one end of an optical fiber, a power supply unit, a wavelength separation unit that separates wavelengths of light transmitted by the optical fiber, and wavelength separation. A communication module connection unit 15 for detachably mounting a communication module connected to the unit 14, and at least one of the GE-ONU module 16, the V-ONU module A17, and the V-ONU module B18 is used by the user. It is configured to be detachably attached and connected according to the communication service.
[Selection] Figure 1

Description

  The present invention relates to an optical receiver used in an optical terminal device of an optical communication system using an optical fiber network such as FTTH (Fiber To The Home).

  2. Description of the Related Art In recent years, optical communication services that perform television cable broadcasting, telephone service, high-speed Internet connection service, and the like using an optical fiber line network such as FTTH have become widespread. In an optical network that provides this type of optical communication service, an optical termination device that converts an optical signal transmitted by an optical fiber cable into an electrical signal is connected to a node on the user side, and installed in the user's house, etc., in the vicinity of the user Is done. Then, a modem or a terminal is connected to the optical terminal device, and data communication is performed with the service provider.

  This type of optical termination device includes an ONU (Optical Network Unit) configured for various purposes such as video distribution and data communication. Conventionally, it has been necessary to install an ONU or an optical termination device for each application. Therefore, with the widespread use of optical communication services and the expansion of applications, an optical termination device that can handle a plurality of applications is desired.

For example, Patent Document 1 discloses a subscriber optical termination device configured to be able to incorporate an interface board that can be hot-plugged into a housing. According to this apparatus, various services can be handled by replacing the interface board. Non-Patent Document 1 discloses an integrated ONU for outdoor installation that accommodates a broadcast ONU and a data communication ONU. According to this apparatus, it is possible to cope with both video distribution and data communication services by an integrated optical terminal device.
JP 2003-318822 A NEC Corporation, "FTTH Solutions Guide", August 2006, http://www.nec.co.jp/access/brochures/FTTH-SG.pdf

  However, in the configuration of Patent Document 1, an operator needs to attach an interface board at the time of installing the optical termination device, or an operator must replace the interface board at the time of changing or expanding the service to be used. For this reason, for example, the interface board cannot be installed or exchanged according to the service used by the user.

  Further, in the configuration of Non-Patent Document 1, since it is an integrated optical termination device for video distribution and data communication, for example, even when there is no need for data communication, an optical termination device having both functions is installed. It will be. For this reason, a large space is required at the installation location regardless of the service used by the user. In addition, in the event of an abnormality, it has been difficult to isolate the function that has become abnormal, and it is difficult to perform function restoration or repair, and all services will be stopped. Also in this configuration, in order to change or expand the service after installation, it is difficult to cope with it because a method such as replacement of all units must be adopted.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical receiving apparatus that can easily and flexibly respond to a service used by a user, and that can easily expand the service. And

  The optical receiver of the present invention separates the wavelength of light transmitted by the optical fiber through the optical connection termination unit and the optical connection termination unit that terminates one end of the optical fiber connected to the optical fiber network A wavelength separation unit, a communication module connection unit that detachably mounts a communication module connected to the wavelength separation unit, and a power supply unit that supplies power to the communication module, and is mounted on the communication module connection unit As a communication module, at least a video communication module that photoelectrically converts the wavelength-separated light and performs signal processing on a video signal, or data communication that photoelectrically converts the wavelength-separated light and performs signal processing on a data signal Any one of the modules is provided.

  This makes it possible to easily and flexibly respond to services used by users, such as video distribution services that distribute video signals and data communication services that transmit and receive data signals, by providing a detachable communication module. Etc. can be easily performed.

  The present invention is the above-described optical receiver, wherein the video communication module of the detachable communication module is at least one of a first video communication module and a second video communication module that use optical signals of different wavelengths. Including those equipped with

  Further, the present invention is the above-described optical receiver, and includes a data communication module that performs photoelectric conversion of the wavelength-separated light and performs signal processing on a data signal, and the detachable communication module includes at least the Including a video communication module.

  In addition, the present invention includes the optical receiver described above, wherein the detachable communication module includes an optical extension wiring module that extends an optical signal transmitted through the optical fiber.

  Further, the present invention is the above-described optical receiver, wherein the wavelength separation unit includes an optical wavelength separation element that separates light of a predetermined wavelength and an optical transmission path that transmits the light between the communication module. And an optical connector portion that is detachably connected.

  The present invention is the above-described optical receiver, wherein the wavelength separation unit includes an optical transmission line unit, and a wavelength separation module having the optical wavelength separation element detachably connected to the optical transmission line unit; Including those equipped with

  In addition, the present invention includes the above-described optical receiving device, wherein the wavelength separation unit includes a termination unit that terminates an end of the optical transmission line.

  The present invention also provides an optical receiving system including any one of the above optical receiving apparatuses and a communication module that can be detachably attached to a communication module connecting portion of the optical receiving apparatus.

  In addition, the present invention can be detachably attached to any one of the above-described optical receivers and a communication module connection portion of the optical receiver, and can be detachably connected to a video device that performs video signal processing. An optical receiving system including a communication module that can be used is provided.

  In addition, the present invention provides a communication module that can be detachably attached to a communication module connection section in the optical receiver.

The present invention is the communication module described above,
In addition to those that can be attached to and detached from the optical receiver, video devices that perform video signal processing can be used by being detachably connected.

  ADVANTAGE OF THE INVENTION According to this invention, the optical receiver which can respond easily and flexibly according to the service which a user utilizes, and can perform the expansion of a service etc. easily can be provided.

  In the present embodiment, as a configuration example of the optical receiving device, a configuration example when applied to an optical termination device installed on the user side of an optical fiber network such as FTTH is shown.

  FIG. 1 is a block diagram showing a schematic configuration of an optical receiving apparatus according to the first embodiment of the present invention. An optical receiving device 10 provided as an optical terminator accommodates one end of an optical fiber 11 connected to an optical fiber network, and has a function of an optical connection terminator to which one end of the optical fiber 11 is connected. An access network optical connection termination unit 12, a power supply unit 13 that supplies power to each unit, and a wavelength separation unit 14 that separates light transmitted from the optical fiber 11 for each wavelength. The optical receiver 10 is installed in a user's house such as a user's house of an optical communication service. The user's house includes not only a general residential house but also an apartment house, a store, a factory, and other various facilities.

  In addition, the optical receiver 10 includes a communication module connection unit 15 that is a connection slot for detachably connecting a communication module corresponding to various optical communication services. The communication module connector 15 includes, as plug-in communication modules, a GE-ONU (Gigabit Ethernet-Optical Network Unit) module 16, a V-ONU (Video-Optical Network Unit) module A17, a V-ONU module B18, The optical extension wiring module 19 and the like can be detachably attached and connected.

  The GE-ONU module 16 is a communication module that performs signal processing corresponding to a data communication service by a GE-PON (Gigabit Ethernet-Passive Optical Network) system. A D-ONU (Data-Optical Network Unit) module has a similar function. This GE-ONU module 16 is connected to a data communication network such as Ethernet (registered trademark) in the user's home, converts an optical signal transmitted through the optical fiber 11 into an electrical signal, demodulates it, and produces a data signal. Input / output to / from the user's home network. An information processing device such as a personal computer (PC) is connected to this network, and data is exchanged between the information processing device and the GE-ONU module 16.

  The V-ONU module A17 and the V-ONU module B18 are communication modules that perform signal processing corresponding to video distribution services such as TV broadcasting and moving image distribution. These V-ONU modules A17 and B18 are provided corresponding to video signals of respective systems transmitted at different wavelengths. The V-ONU modules A17 and B18 are connected to video equipment such as a set-top box (STB) and a television via a video line in the user's house, convert the optical signal transmitted through the optical fiber 11 into an electrical signal, and demodulate it. The video signal A and the video signal B are output to the video equipment in the user's home.

  The optical extension wiring module 19 is a communication module that extends an optical signal transmitted through the optical fiber 11. The optical extension wiring module 19 is connected to an optical wiring such as an optical fiber in a user's home and inputs / outputs an optical signal transmitted through the optical fiber 11. .

  The access network optical connection termination unit 12 includes a surplus length processing unit, performs surplus length processing at one end of the optical fiber 11, and connects the termination. The power supply unit 13 receives a DC power supply or an AC power supply, supplies a power supply voltage stabilized to a predetermined voltage to the communication module connection unit 15 via the wavelength separation unit 14, and supplies power to each unit of the device such as each communication module. Supply. The wavelength separation unit 14 performs relay, branching, and wavelength separation of an optical signal transmitted through the optical fiber 11, and includes various filters such as a filter, a waveguide, and a mirror. As a means for wavelength separation, a WDM (Wavelength Division Multiplexing) filter or the like is used.

  When the optical receiver 10 configured as described above is installed in a user's home, the casing body is installed in a desired location, one end of the optical fiber 11 is connected to the access network optical connection termination unit 12, and the user A corresponding communication module is attached to the communication module connection unit 15 according to the optical communication service used by the communication module. For example, when using the video distribution service, the V-ONU module A17 is installed and connected to the video line in the user's home. When using a data communication service, the GE-ONU module 16 is mounted and connected to the user's home network. When extending the optical wiring to the user's home, the optical extension wiring module 19 is attached and connected to the optical wiring in the user's home.

  If the optical communication service to be used is changed or added after the optical receiving device 10 is installed, a communication module corresponding to the optical communication service is replaced or newly added to the communication module connection unit 15. To do. For example, in the case where the V-ONU module A17 is installed and another video distribution service transmitted at a different wavelength is additionally used, the V-ONU module B18 is additionally installed and installed in the user's home. Connect to the video line. When a data communication service is additionally used while using a video distribution service, the GE-ONU module 16 is additionally installed and connected to the network in the user's home.

  In this optical receiver 10, an optical signal transmitted through the optical fiber 11 is guided to the wavelength separation unit 14 via the access network optical connection termination unit 12. The wavelength separation unit 14 relays, branches, and separates the optical signal, and transmits the optical signal to each communication module attached to the communication module connection unit 15. Then, photoelectric conversion and signal processing are performed in each communication module such as the GE-ONU module 16, the V-ONU modules A17, and B18, and a data signal, a video signal, and the like corresponding to the transmitted optical signal are output.

  According to the optical receiver 10 configured as described above, a space-saving optical receiver adapted to each user can be configured by installing necessary communication modules according to desired services that the user wants to use. . In addition, it is possible to easily identify and replace abnormal functions by attaching and detaching the communication module in the event of an abnormality, so it is possible to identify the abnormal location relatively easily in a short time, and replace only the communication module that has become abnormal. It can be repaired. For this reason, it becomes easy to cope with function restoration and repair. To change or expand the service after installation, it is possible to replace the communication module or add a new one.

  FIG. 2 is a block diagram showing a schematic configuration of an optical receiving apparatus according to the second embodiment of the present invention. The second embodiment is a modification of the first embodiment described above, in which the internal configuration of the optical receiver is partially changed. Constituent elements similar to those in the first embodiment shown in FIG.

  The optical receiver 20 of the second embodiment includes an access network optical connection termination unit 12, a power supply unit 13, a wavelength separation unit 21, a communication module connection unit 22, and a data signal processing unit 23. The wavelength separation unit 21 and the communication module connection unit 22 have the same functions as those of the first embodiment, and have different connection configurations.

  The data signal processing unit 23 has a function equivalent to that of the GE-ONU module 16 of the first embodiment, and performs signal processing corresponding to the data communication service by the GE-PON system. The data signal processing unit 23 is connected to a data communication network such as Ethernet (registered trademark) in the user's home, converts the optical signal transmitted through the optical fiber 11 into an electrical signal, demodulates it, and produces a data signal. Input / output to / from the user's home network.

  The communication module connection unit 22 can connect and connect a V-ONU module A17, a V-ONU module B18, an optical extension wiring module 19 and the like as a plug-in type communication module.

  When the optical receiver 20 configured as described above is installed in a user's home, the casing body is installed at a desired location, one end of the optical fiber 11 is connected to the access network optical connection termination unit 12, and the user A corresponding communication module is attached to the communication module connection unit 22 in accordance with the optical communication service used by the communication module. Then, the data signal processing unit 23 is connected to the user home network.

  In the second embodiment, since the data signal processing unit 23 is mounted in advance, the data communication service can be used. When an optical communication service to be used is added or changed during or after the optical receiver 20 is installed, a communication module corresponding to the optical communication service is newly added or exchanged and attached to the communication module connection unit 22 To do. For example, when a video distribution service is additionally used, the V-ONU module A17 is additionally installed and connected to a video line in the user's home. In addition, when another type of video delivery service transmitted at a different wavelength is additionally used, the V-ONU module B18 is additionally installed and connected to a video line in the user's home. When extending the optical wiring to the user's home, the optical extension wiring module 19 is attached and connected to the optical wiring in the user's home.

  In this optical receiver 20 as well, as in the first embodiment of FIG. 1, the optical signal transmitted through the optical fiber 11 is guided to the wavelength separation unit 21 via the access network optical connection termination unit 12. The wavelength separation unit 21 relays, branches, and separates the optical signal, and the optical signal is transmitted to each communication module mounted on the communication module connection unit 22 together with the data signal processing unit 23. Then, photoelectric conversion and signal processing are performed in each communication module such as the V-ONU modules A17 and B18, and a data signal, a video signal, and the like corresponding to the transmitted optical signal are output.

  According to the optical receiver 20 configured as described above, a space-saving optical receiver adapted for each user can be obtained by mounting a necessary communication module, similarly to the optical receiver 10 of the first embodiment. It is configurable. Depending on the desired service that the user wants to use, for example, when the user wants to use the video distribution service by adding from the usage state of the data communication service, the data communication service and video can be easily added by adding a V-ONU module. Distribution service can be made available.

  Next, the external configuration of the communication module used in the optical receiver of this embodiment is shown. FIG. 3 is a schematic configuration diagram of a communication module according to the present embodiment. The communication module 30 is configured for each function such as a V-ONU module or a GE-ONU module, and is used by being detachably attached to the communication module connection units 15 and 22 of the optical receivers 10 and 20. The communication module 30 is configured to have, for example, a thick plate-shaped or rectangular parallelepiped housing and incorporates a circuit board such as a V-ONU or a GE-ONU. In addition, the communication module 30 includes an optical connector portion 31 that connects an optical transmission line to an end portion, and a power connector portion 32 that connects a power supply line. By inserting and mounting the communication module 30 in the communication module connection portions 15 and 22 in the direction of the arrow in the figure, the wavelength separation portions of the optical receivers 10 and 20 via the optical connector portion 31 and the power connector portion 32 are attached. 14 and 21 and the power supply unit 13 to receive optical signal supply and power supply. In the communication module 30 configured to be detachable as described above, photoelectric conversion, signal processing, and the like are performed.

  The removable communication module 30 configured as described above can be easily attached to and detached from the optical receiver without requiring a user to use a special tool or a complicated operation. Thereby, an optical receiver having a desired function can be configured with a simple operation.

  Next, a configuration example of the wavelength demultiplexing unit and the communication module connection unit in the optical receiving apparatus of this embodiment will be described.

  FIG. 4 is a schematic configuration diagram illustrating a first configuration example of the wavelength separation unit. This first configuration example is a configuration suitable for the optical receiver of the second embodiment shown in FIG. The wavelength separation unit 50 of the first configuration example shows a simplified basic configuration including the functions of the wavelength separation unit and the communication module connection unit. For example, 1.31 μm (for upstream data communication), 1.49 μm (downstream) This is a configuration of a wavelength separation unit corresponding to three wavelengths of 1.55 μm (for video communication) and 1.55 μm (for video). The wavelength separation unit 50 includes optical connectors 51, 52, and 53 that input and output optical signals, and an optical wavelength separation element 54 that separates optical signals. The optical wavelength separation element 54 transmits light of a specific wavelength, reflects light of other wavelengths and separates the wavelength of the optical signal into two, and is composed of a wavelength separation mirror such as a WDM filter. The The optical wavelength separation element 54 is configured to separate wavelengths corresponding to services used by the user, such as video signals and data signals. The optical wavelength separation element 54 may use a configuration that separates the optical signal into two without separating the wavelength, or may include such a configuration that simply separates the optical signal.

  The optical connector 52 of the V-ONU module 55 and the like are detachably connected to the optical connector 52 on one output side of the wavelength separation unit 50, and the data signal processing unit 23 is connected to the optical connector 53 on the other output side. It is connected. The V-ONU module 55 includes a light receiving element (PD) 57 in the vicinity of the optical connector 56 of the optical input unit, and performs photoelectric signal conversion on the input optical signal to perform signal processing on the video signal. A filter 58 formed by coating or the like is provided on the light receiving surface of the light receiving element 57 so as to transmit an optical signal having a desired wavelength. For example, two wavelengths of 1558.98 nm and 1552.52 nm used for video are separated, and only an optical signal having a desired wavelength can be received and photoelectrically converted. Here, a V-ONU module A17 corresponding to one wavelength and a V-ONU module B18 corresponding to the other wavelength are prepared, and the V-ONU module is selectively selected according to the service used by the user. It can be connected and used.

  In this wavelength separation unit 50, an optical signal transmitted through the optical fiber 11 is separated into a wavelength of 1.55 μm and other wavelengths by the optical wavelength separation element 54, and an optical signal having a wavelength of 1.55 μm is converted into a V-ONU. The signals are transmitted to the module 55, and optical signals of other wavelengths are transmitted to the data signal processing unit 23. The data signal processing unit 23 inputs an optical signal having a wavelength of 1.49 μm for downstream data communication, outputs an optical signal having a wavelength of 1.31 μm for upstream data communication, photoelectric conversion of these optical signals, and data signal Signal processing is performed. In the V-ONU module 55, an optical signal having a wavelength of 1558.98 nm or 15552.2 nm is input, photoelectric conversion, and signal processing related to a video signal are performed.

  By using the wavelength separation unit 50 configured as described above, the wavelength corresponding to each optical communication service is separated, and a communication module such as a V-ONU module can be detachably connected.

  FIG. 5 is a schematic configuration diagram illustrating a second configuration example of the wavelength separation unit. This second configuration example is a configuration suitable for the optical receiver of the first embodiment shown in FIG. 1 and the second embodiment shown in FIG. Similar to the first configuration example, the wavelength separation unit 60 of the second configuration example includes functions of the wavelength separation unit and the communication module connection unit, and is attached to and detached from the optical transmission path unit 61. A possible wavelength separation module 62, an optical connection jumper 63, and an optical terminator 64 are provided. The optical transmission path unit 61 includes optical connectors 71, 72, and 74 that input and output optical signals, and an optical transmission section 73 that has an optical transmission path that relays optical signals. The optical connection jumper 63 is a plug-in type connection module having an optical transmission path for relaying an optical signal. The optical terminator 64 terminates the optical signal and has a structure that prevents the optical signal from being reflected and sent back.

  FIG. 6 is a diagram showing the configuration of the wavelength separation module. The wavelength separation module 62 is a plug-in type optical module, and includes optical connectors 75, 76, and 77 that input and output optical signals, an optical wavelength separation element 78 that separates optical signals, and one of the separated optical signals as light. And a light transmission portion 79 which is an optical transmission means such as a waveguide guided to the connector 77. The optical wavelength separation element 78 transmits light of a specific wavelength (λ1) and reflects light of other wavelengths (λ2, λ3,...) To separate the wavelength of the optical signal into two, such as a WDM filter. It comprises a mirror for wavelength separation. Instead of the wavelength separation module 62, a module configured to separate the optical signal into two without separating the wavelength is used, or such a configuration that simply separates the optical signal is included in the wavelength separation module 62. It may be.

  The wavelength separation module 62 connects the input-side optical connector 75 to the optical connector 72 of the optical transmission line unit 61 and the one output-side optical connector 77 to the connector 74 of the optical transmission unit 73. At this time, a wavelength separation module that separates corresponding wavelengths is used according to the service used by the user. An optical connector 56 of the V-ONU module 55 is detachably connected to the optical connector 76 on the other output side of the wavelength separation module 62. In the optical transmission line unit 61, the optical connection jumper 63 is connected to an unused connector corresponding to the empty slot of the communication module connection parts 15 and 22, and the optical termination part 64 is connected to the end of the optical transmission line. . The optical terminator 64 may be configured to be detachably connected to a portion serving as the end of the optical transmission line instead of the optical connection jumper 63.

  In this wavelength separation unit 60, similarly to the wavelength separation unit 50 of the first configuration example, the optical signal transmitted through the optical fiber 11 is separated into a wavelength of 1.55 μm and other wavelengths by the optical wavelength separation element 78. Then, an optical signal having a wavelength of 1.55 μm is transmitted to the V-ONU module 55. The V-ONU module 55 separates two wavelengths of 1558.98 nm and 15552.2 nm used for video, receives only an optical signal having a desired wavelength, performs photoelectric conversion, and performs signal processing on the video signal.

  Here, the wavelength demultiplexing unit 60 is adapted to the configuration of the optical receiver 10 of the first embodiment shown in FIG. 1, for example, and mounted, the GE-ONU module 16, the V-ONU module A17, and the V-ONU module. A configuration in which the wavelength separation module 62 and the like are connected in correspondence with each communication module such as the B18 and the optical extension wiring module 19 can also be adopted.

  By using the wavelength separation unit 60 configured as described above, the wavelength corresponding to each optical communication service is separated, and a communication module such as a V-ONU module can be detachably connected. In this case, by adopting a configuration in which the wavelength separation module 62 is detachable, it is possible to easily and flexibly configure various types of wavelength separation units corresponding to the communication module of the desired optical communication service to be connected.

  In the wavelength demultiplexing units 50 and 60 described above, the optical connector for detachably connecting the communication module has a structure that is not affected by external force. For example, when connecting a video signal coaxial cable or the like to the output portion of the communication module, external force may be applied to impair the connection stability of the optical connector portion. In view of this, the optical connector is provided with stress absorbing means constituted by an elastic member or the like so that the angles of the optical axes of both optical transmission lines connected by the optical connector do not change even when an external force is applied.

  In addition to providing a member for preventing reflection at the end of the optical transmission line, the optical terminal portion uses an oblique connector for the optical connector of the connection portion of the communication module, or uses an optical connector portion as a shutter structure to transmit light to the shutter portion. It may be configured to have a termination function. By using an oblique connector, the optical transmission line can be terminated regardless of whether or not the communication module is connected without providing a member having an optical termination function. By using the shutter structure, the optical connector portion can be closed when the communication module is not connected, and the optical transmission line can be brought into a terminal state.

  FIG. 7 is a diagram illustrating a configuration example of an optical connector using an oblique connector. An oblique connector 81 as shown in FIG. 7 can be provided in the optical connectors 72, 74, 75, 77 of the wavelength separation unit. The oblique connector 81 has a connection portion 82 whose end face is formed obliquely as a connection portion of the optical transmission line. By using such an oblique connector 81, it is possible to bring the optical transmission line into a terminal state regardless of whether or not the communication module is connected without providing an optical terminal part.

  A communication module such as a V-ONU module that can be attached to and detached from the optical receiver as described above can be used by being mounted on a video device such as a set top box (STB) to which a television or the like is connected. FIG. 8 is a diagram illustrating a configuration of an optical reception system when a communication module is connected to a video device, and FIG. 9 is a block diagram illustrating a schematic configuration of the video device having a communication module detachably connected thereto.

  In the optical receiving system shown in FIG. 8, optical wiring using an optical cable wired in the user's house is performed with respect to the optical receiving device 90 including the wavelength separation unit 60 to which a communication module such as the GE-ONU module 15 is detachably attached. In this configuration, 92 optical connectors 91 are connected to the wavelength separator 60. In addition, you may make it connect the optical wiring 92 using the optical extension wiring module 19 shown in FIG.

  The other end of the optical wiring 92 is connected to a video device 100 such as a set top box (STB) or a hard disk recorder (HDD recorder). The video device 100 is connected to a TV 110 that is a video display monitor, and can be detachably mounted with a communication module such as the V-ONU module 55. The V-ONU module 55 is detachably mounted and connected to the communication module connection slot of the video equipment 100. Then, the optical connector at the other end of the optical wiring 92 is connected to the optical connector 56 of the V-ONU module 55.

  As shown in FIG. 9, the V-ONU module 55 includes an optical connector 56 and a power connector 115 at one end, and a power connector 116 and an RF connector 117 at the other end. That is, it is configured to be detachable from both the optical receiver and the video equipment. The optical connector 56 and the power connector 115 are connected when mounting on the optical receiver, and the RF connector 117 and power connector 116 are connected when mounting on the video equipment. The V-ONU module 55 includes a photoelectric conversion unit 111, a demodulation unit 112, an RF output unit 113, and a power supply unit 114.

  When the V-ONU module 55 is attached to the video device 100, the V-ONU module 55 is inserted into the communication module connection unit in the video device 100 and connected to the communication module IF (interface) 101. At this time, the RF connector 117 is connected to the RF connection unit 102 and the power connector 116 is connected to the power supply unit 103. The V-ONU module 55 operates when the power supply unit 114 receives power supply from the video equipment 100 via the power supply unit 103 and supplies operation power to each unit. In the V-ONU module 55, the optical signal is converted into an electrical signal by the photoelectric conversion unit 111, the video signal is demodulated by the demodulation unit 112, and the RF output unit 113 outputs the video signal as an RF signal. Then, the RF signal is output to the video signal input unit of the video equipment 100 via the RF connection unit 102. The video equipment 100 performs signal processing of the video signal input from the V-ONU module 55 and outputs the video signal to the TV 110 to display the video or record the video signal.

  According to such an optical receiving system, the V-ONU module 55 can be used detachably for both the optical receiving device and the video equipment, so that the communication module can be easily used in the video equipment at hand of the user. It becomes possible to exchange and add. For this reason, even when it is difficult to work at the place where the optical receiving device is installed in the user's home, the user himself / herself uses the video equipment at the end of the optical wiring without requiring complicated work and tools. A communication module can be easily exchanged and added according to a desired optical communication service.

  As described above, the optical receiving apparatus and optical receiving system of the present embodiment can easily and flexibly respond to services used by users, such as data communication and video distribution, and can easily expand services. Therefore, usability can be improved.

  The optical receiver and the optical receiver system described above can be equipped with wireless LAN modules, PLC (power line communication) modules, etc. as other communication modules, and various user home wirings for using optical communication services. It can also be provided.

  It should be noted that the present invention is not limited to those shown in the above-described embodiments, and those skilled in the art can also make changes and applications based on the description in the specification and well-known techniques. Yes, included in the scope of protection.

  INDUSTRIAL APPLICABILITY The present invention has an effect of being able to easily and flexibly respond to a service used by a user, enabling easy service expansion, and the like, and an optical communication system using an optical fiber network such as FTTH. It is useful as an optical receiver used in an optical terminator.

The block diagram which shows schematic structure of the optical receiver which concerns on the 1st Embodiment of this invention The block diagram which shows schematic structure of the optical receiver which concerns on the 2nd Embodiment of this invention. Schematic configuration diagram of a communication module according to the present embodiment Schematic configuration diagram showing a first configuration example of a wavelength separation unit according to the present embodiment The schematic block diagram which shows the 2nd structural example of the wavelength separation part which concerns on this embodiment. The figure which shows the structure of the wavelength separation module which concerns on this embodiment The figure which shows the structural example of the optical connector using a diagonal connector The figure which shows the structure of the optical reception system when the communication module is connected to the video equipment Block diagram showing schematic configuration of video equipment with communication module detachably connected

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 20 Optical receiver 11 Optical fiber 12 Access network optical connection termination part 13 Power supply part 14, 21 Wavelength separation part 15, 22 Communication module connection part 16 GE-ONU module 17, 18 V-ONU module 19 Optical extension wiring module 23 Data signal processor (GE-ONU)
50, 60 Wavelength separation unit 51, 52, 53, 56, 71, 72, 75, 76, 77 Optical connector 54, 78 Optical wavelength separation element 57 Light receiving element 58 Filter 61 Optical transmission line unit 62 Wavelength separation module 63 Optical connection jumper 64 Optical termination

Claims (11)

An optical connection termination for terminating one end of the optical fiber connected to the optical fiber network;
A wavelength separation unit that separates wavelengths of light transmitted by the optical fiber through the optical connection termination unit;
A communication module connection unit detachably mounting a communication module connected to the wavelength separation unit;
A power supply unit that supplies power to the communication module;
As a communication module attached to the communication module connection unit, at least a video communication module that performs photoelectric conversion of the wavelength-separated light and performs signal processing on a video signal, or photoelectrically converts the wavelength-separated light An optical receiver including any one of data communication modules that perform signal processing related to a data signal. The optical receiver according to claim 1,
An optical receiver comprising at least one of a first video communication module and a second video communication module that use optical signals of different wavelengths as the video communication module of the detachable communication module. The optical receiver according to claim 1,
An optical receiving device including a data communication module that performs photoelectric conversion of the wavelength-separated light and performs signal processing on a data signal, and includes at least the video communication module as the removable communication module. The optical receiver according to claim 1,
An optical receiver comprising an optical extension wiring module that extends an optical signal transmitted by the optical fiber as the detachable communication module. The optical receiver according to claim 1,
The wavelength demultiplexing unit includes an optical wavelength demultiplexing element that demultiplexes light having a predetermined wavelength, and an optical connector unit that detachably connects an optical transmission path that transmits the light to and from the communication module. . The optical receiver according to claim 5, wherein
The wavelength separation unit includes an optical transmission line unit and a wavelength separation module including the optical wavelength separation element detachably connected to the optical transmission line unit. The optical receiver according to claim 5, wherein
The wavelength separation unit is an optical receiver including a termination unit that terminates the end of the optical transmission line.   8. An optical receiving system comprising: the optical receiving device according to claim 1; and a communication module that can be detachably attached to a communication module connecting portion of the optical receiving device. An optical receiver according to any one of claims 1 to 7,
An optical receiving system including a communication module that can be detachably attached to a communication module connection portion of the optical receiving device and that can be detachably connected to and used in video equipment that performs video signal processing.   The communication module which can be detachably attached to the communication module connection part in the optical receiver according to claim 1. The communication module according to claim 10, wherein
A communication module that can be attached to and detached from the optical receiver and can be used by being detachably connected to video equipment that performs signal processing of video signals.

Images