CN203691409U - Optical network unit device - Google Patents

Abstract

The utility model relates to an optical network unit device. An optical fiber link of the optical network unit device is provided with a thin film reflector for transmitting signals and reflecting detection light. The thin film reflector is integrated on the optical fiber link of the optical network unit device and the thin film reflector can transmits the signal light and reflect detection light, and a pluggable reflector is not needed to be installed on a connector of the optical network device unit, so that the cost is reduce, the uncertainty caused by the external pluggable reflector can be avoided and the reliability of the device is guaranteed.

Description

An optical network unit device

technical field

The utility model belongs to the technical field of optical communication, in particular to an optical network unit device.

Background technique

With the development of optical fiber communication technology, people's demand for bandwidth growth has promoted the development of optical fiber access network FTTH (Fiber To The Home, fiber to the home) and PON (Passive Optical Network, passive optical network) network. As the number increases, the maintenance of network equipment becomes a very important task. In order to realize the monitoring of PON network quality, as shown in Figure 1, OTDR (Optical Time Domain Reflectometer, Optical Time Domain Reflectometer) is generally used in OLT (Optical Line Terminal, The optical cable terminal equipment) side emits detection light, and the detection light passes through the ODN (Optical Division Note, Optical Network Distribution Node) device to each ONU (Optical Net Unit, Optical Network Unit) device, and the detection light is reflected at each ONU device, and finally Realize line fault detection. In order to locate each user's ONU device, refer to Figure 2, which shows the structure of a typical ONU device for FTTX, mainly including optical transceiver modules (BOSA) and some control units (not shown in the figure), for To achieve the purpose of line monitoring, a pluggable reflector needs to be connected to the connector of the ONU to reflect the detection light of the OTDR. Generally, the wavelength of the detection light is 1625nm to 1650nm. Pluggable reflectors need to be manufactured and purchased separately, and assembled by construction workers. Often, due to construction quality control problems, the end faces of the connectors are polluted, causing communication line failures. This method needs to add additional devices, which increases the user's cost, and at the same time, new devices will also bring about equipment reliability problems.

Utility model content

In view of the above problems, the purpose of this utility model is to provide an optical network unit device, which aims to solve the problem that the existing optical network unit device needs an external pluggable reflector, which not only increases the user cost but also affects the reliability of the device question.

The utility model is realized in such a way that an optical network unit device includes a thin-film reflector for transmitting signal light and reflecting detection light on its optical fiber link.

Further, the optical network unit equipment includes an optical transceiver module and a connector assembly, the optical transceiver module and the connector assembly are connected by an optical fiber jumper, and the film reflector is arranged on the optical transceiver module or inside the connector assembly.

Further, the optical transceiver module includes a laser, a filter, a receiving photosensitive diode and a ceramic ferrule, the ceramic ferrule is located on the laser irradiation light line, and the film reflector is located on the ferrule of the ceramic ferrule end face.

Further, the connector assembly includes an output connector to match a drop fiber connector for the output connector, and the film reflector is located on the output end surface of the output connector.

Further, the film reflector is a vacuum-plated dielectric film, or a sheet coated with a dielectric film.

Further, the thin film reflector transmits in the bands of 1260nm-1360nm and 1460nm-1581nm, and reflects in the bands of 1610nm-1660nm.

The beneficial effect of the utility model is that: the fiber link of the optical network unit equipment provided by the utility model is integrated with a thin film reflector, and the thin film reflector can transmit signal light and reflect detection light. In this way, there is no need to additionally install a pluggable reflector on the connector interface of the optical network unit device, which reduces the cost and avoids uncertainty caused by the externally connected pluggable reflector, thereby ensuring the reliability of the device.

Description of drawings

FIG. 1 is a schematic diagram of fault detection in an existing PON network;

Fig. 2 is a kind of structural diagram of existing optical network unit equipment;

FIG. 3 is a structural diagram of an optical network unit device provided by an embodiment of the present invention;

Fig. 4 is another structural diagram of the optical network unit device provided by the embodiment of the present invention;

Fig. 5 is a third structure diagram of the optical network unit device provided by the embodiment of the present invention;

Fig. 6 is a fourth structure diagram of the optical network unit device provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

In the utility model, a thin-film reflector is arranged on the optical fiber link of the optical network unit equipment, the signal light in the ONU device can be transmitted through the thin-film reflector, and the detection light of the OTDR is reflected by the thin-film reflector, as an example , the thin film reflector transmits in the bands of 1260nm-1360nm and 1460nm-1581nm, and reflects in the bands of 1610nm-1660nm. In order to illustrate the technical solution described in the utility model, the following specific examples will be used for illustration.

Fig. 3 shows a structure of the optical network unit device provided by the embodiment of the present invention, and only shows the part related to the embodiment of the present invention for convenience of description.

The optical network unit equipment shown in Figure 3 includes an optical transceiver module 1 and a connector assembly 2, the optical transceiver module 1 and the connector assembly 2 are connected by an optical fiber jumper 3, and a thin film reflector 4 is arranged on the In the optical transceiver module 1, when the signal light and the OTDR detection light reach the optical transceiver module 1 of the ONU, the signal light can be transmitted from the thin film reflector 4 on the optical transceiver module 1, and the OTDR detection light will be reflected back, and finally Complete ONU positioning.

Preferably, referring to another structure of the optical network unit device described in FIG. On the laser irradiation light line, the film reflector 4 is located on the ferrule end surface of the ceramic ferrule 14 . This preferred mode further discloses a specific preferred structure of the optical transceiver module 1 , and the film reflector 4 is arranged on the ferrule end face of the ceramic ferrule 14 .

Fig. 5 shows a third structure of the optical network unit device provided by the embodiment of the present invention, and only shows the part related to the embodiment of the present invention for convenience of description.

The optical network unit equipment shown in Figure 5 includes an optical transceiver module 1 and a connector assembly 2, the optical transceiver module 1 and the connector assembly 2 are connected by an optical fiber jumper 3, and a thin film reflector 4 is arranged on the In the connector assembly 2, when the signal light and the OTDR detection light reach the connector assembly 2 of the ONU, the signal light can be transmitted from the film reflector 4 on the connector assembly 2, and the OTDR detection light will be reflected back, and finally Complete ONU positioning.

Preferably, referring to the fourth structure of the optical network unit device shown in FIG. 6, the connector assembly 2 includes an output connector 21 to match a home optical fiber connector 22 matched with the output connector 21, the The film reflector 4 is located on the output end surface of the output connector 21 . This preferred manner further discloses a specific preferred structure of the connector assembly 2 , and the film reflector 4 is arranged on the output end surface of the output connector 21 .

In each of the above embodiments, the thin film reflector 4 is a vacuum-plated dielectric thin film, or a sheet coated with a dielectric thin film. During production, the thin film reflector 4 can be vacuum-coated on the end face of the ceramic ferrule (or the output end face of the output connector) to make a layer of dielectric film; or after vacuum coating on a sheet , bonded on the end face of the ceramic ferrule (or the output end face of the output connector) by glue, this kind of sheet can be made of polymer materials or glass, and the thickness generally does not exceed 50um, such as when using polymer materials to make sheets First, the liquid polymer material is uniformly coated on the substrate by a glue leveler, and then the polymer material is solidified to make a thin film, and then a layer of WDM (Division Multiplexing, wavelength division multiplexing) is coated on the polymer material by vacuum coating method Dielectric film. Finally, the dielectric film and the polymer material sheet are removed from the substrate and cut into small pieces to make a thin film reflector. The small piece is directly glued to the end face of the ceramic ferrule (or the output of the output connector) end face) can be. These two methods can achieve large-scale production.

Finally, it should be pointed out that the above two manufacturing methods of the film reflector are just examples, and this implementation example does not limit the above methods.

To sum up, in the embodiment of the present invention, a thin film reflector is integrated on the optical fiber link of the optical network unit device, and the thin film reflector can transmit signal light and reflect detection light. In this way, there is no need to additionally install a pluggable reflector on the connector interface of the optical network unit device, which reduces the cost and avoids uncertainty caused by the externally connected pluggable reflector, thereby ensuring the reliability of the device.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. a device of optical network unit, is characterized in that, is provided with the pellicle reflector of surveying light for transmission signal light, reflection on the optical fiber link of described device of optical network unit.

2. device of optical network unit as claimed in claim 1, it is characterized in that, described device of optical network unit comprises optical transceiver module and connector assembly, between described optical transceiver module and described connector assembly, be connected by optical patchcord, described pellicle reflector is arranged in described optical transceiver module or connector assembly.

3. device of optical network unit as claimed in claim 2, it is characterized in that, described optical transceiver module comprises laser, filter, reception photodiode and ceramic insertion core, described ceramic insertion core is positioned on described laser illumination light circuit, and described pellicle reflector is positioned on the insertion core end face of described ceramic insertion core.

4. device of optical network unit as claimed in claim 2, is characterized in that, described connector assembly comprises the Drop cable connector of out connector to match with described out connector, and described pellicle reflector is positioned on the output end face of described out connector.

5. device of optical network unit as described in claim 1-4 any one, is characterized in that, described pellicle reflector is the dielectric film that vacuum is coated with, or for being coated with the thin slice of dielectric film.

6. described device of optical network unit as claimed in claim 5, is characterized in that, described pellicle reflector, in 1260nm～1360nm and the transmission of 1460nm～1581nm wave band, reflects at 1610nm～1660nm wave band.

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