CN103163601A - Light-emitting and light-receiving device - Google Patents

Abstract

The optical transceiver device provided by the present invention includes at least one optical transceiver module, the at least one optical transceiver module includes an optical transmitter module and an optical receiver module, the optical transmitter module includes a light source module and an optical modulator, the The optical receiving module includes a photoelectric conversion element, a first optical circulator, a second optical circulator and an electrical signal source connected to the optical modulator. One port of the first optical circulator is connected to one port of the second optical circulator, and the other two ports of the first optical circulator are respectively connected to the photoelectric conversion element and the optical modulator. The circulator and the second optical circulator make the light emitted by the light-emitting module and the light received by the light-receiving module form an optical path that does not interfere with each other. The electric signal source transmits the electric signal to be loaded to the light modulator to modulate the light wave emitted by the light source module.

Description

optical transceiver

technical field

The invention relates to the field of optical fiber communication, in particular to an optical transceiver.

Background technique

At present, the construction of high-bandwidth and low-loss optical transmitting and optical receiving modules has become a trend in the optical communication market. The mode in which the light emitting and light receiving modules operate independently has the disadvantages of a large number of components and insufficient convenience.

Contents of the invention

In view of this, it is necessary to provide an integrated optical transceiver device that combines a transmitting module and a receiving module.

An optical transceiver device, comprising at least one optical transceiver module, the at least one optical transceiver module includes an optical transmitter module and an optical receiver module, the optical transmitter module includes a light source module and an optical modulator device, the light receiving module includes a photoelectric conversion element. The optical transceiver module also includes: a first optical circulator, a second optical circulator and an electrical signal source connected to the optical modulator. The first and second optical circulators respectively include three ports, all of which are used to guide light to enter and exit sequentially or in reverse order between two adjacent ports of the three ports, and one port of the first optical circulator is connected to the One port of the second optical circulator is connected, and the other two ports of the first optical circulator are respectively connected with the optical modulator and the photoelectric conversion element, and the first optical circulator and the second optical circulator make the optical circulator The light emitted by the light-emitting module and the light received by the light-receiving module form an optical path that does not interfere with each other. The electric signal source transmits the electric signal to be loaded to the light modulator to modulate the light wave emitted by the light source module.

An optical transceiver device, comprising at least one optical transceiver module, the at least one optical transceiver module includes an optical transmitter module and an optical receiver module, the optical transmitter module includes a light source module and an optical modulator device, the light receiving module includes a photoelectric conversion element. The photoelectric conversion element is connected with the light modulator, and the electrical signal converted by the photoelectric conversion element enters the light modulator to modulate the light wave emitted by the light source module. The optical transceiver module also includes a first optical circulator and a second optical circulator, and the first and second optical circulators respectively include three ports, all of which are used to guide light in adjacent ones of the three ports. The two ports enter and exit sequentially or in reverse order, one port of the first optical circulator is connected to one port of the second optical circulator, and the other two ports of the first optical circulator are respectively connected to the optical modulator and The photoelectric conversion element is connected, and the first optical circulator and the second optical circulator make the light emitted by the light-emitting module and the light received by the light-receiving module form an optical path that does not interfere with each other.

Compared with the prior art, the present invention uses an optical circulator to guide light into and out of the optical transceiver device, thereby reducing the number of components, improving the degree of modularization, improving the efficiency of the module and the quality of optical signal transmission, and is easy to integrate and combine with other electronic products. Improve the compatibility of optical communication modules.

Description of drawings

FIG. 1 is a schematic diagram of an optical transceiver provided by a first embodiment of the present invention.

Fig. 2 is a schematic diagram of an optical transceiver provided by a second embodiment of the present invention.

Fig. 3 is a schematic diagram of an optical transceiver provided by a third embodiment of the present invention.

Description of main component symbols

optical transceiver 10, 20, 50 Optical Transceiver Module 100, 200, 600 Light emitting module 22, 42, 62 Optical module 24, 44, 64 Light source module 220, 420, 620 light modulator 224, 424, 624 electrical signal source 226,426 Photoelectric conversion element 242, 442, 642 switch 28 Optical circulator 46,66 first optical circulator 26 second optical circulator 27

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Please refer to Fig. 1, the first embodiment of the present invention provides an optical transceiver device 10, which includes at least one optical transceiver module 100, each optical transceiver module 100 includes an optical transmitter module 22, an optical receiver module 24 , a first optical circulator 26 , a second optical circulator 27 , and a switch 28 .

The light emitting module 22 includes a light source 220 , a light modulator 224 , and an electrical signal source 226 .

The light source 220 can be a laser diode (laser diode). The optical modulator 224 can be, for example, a Mach-Zehnder Modulator (Mach-Zehnder Modulator) or other optical modulators, and the modulation method can be phase modulation (phase modulation), or frequency modulation. (frequency modulation) and other modulation methods.

The electrical signal source 226 transmits the electrical signal to be loaded to the optical modulator 224 , and then the optical modulator 224 modulates the light wave emitted by the light source 220 .

The light receiving module 24 includes a photoelectric conversion element 242 such as a photodiode. The photoelectric conversion element 242 is used to receive the optical signal input to the optical receiving module 24 and convert it into an electrical signal.

The first optical circulator 26 and the second optical circulator 27 have the same structure, are passive elements, and have the characteristic of being able to operate without relying on a power source. Each optical circulator has three ports, which are port 1, port 2 and port 3. Its operating mode is that when light enters port 1, it exits through port 2; when light enters through port 2, it exits through port 3; When the port enters, the light exits from port 1.

Port 1 of the first optical circulator 26 is connected to the optical emitting module 22, port 3 is connected to the optical receiving module 24, port 2 is connected to port 1 of the second optical circulator 27, as shown in the figure Under the clockwise circulation direction, the incident light beam enters from port 3 of the second optical circulator 27, exits from port 1, enters port 2 of the first optical circulator 26, exits from port 3, and enters the optical receiving module 24 . The outgoing beam enters port 1 of the first optical circulator 26 and exits port 2, enters port 1 of the second optical circulator 27 and exits port 2. The two light waves do not interfere with each other and are different from each other. The light circulator can also specify the counterclockwise direction as the light circulation direction.

The switch 28 is connected with the light-emitting module 22 and the light-receiving module 24 at the same time, and is used to selectively open or close the power supply circuits of the light-emitting module 22 and the light-receiving module 24 . Due to the switch 28 , the optical transceiver module 100 can be freely switched to a simple optical receiving module or an optical emitting module, which improves the freedom of use of the optical transceiver device 10 .

It can be understood that the optical transceiver device 10 may not have the switch 28 , that is, the optical emitting module 22 and the optical receiving module 24 work simultaneously.

Please refer to Fig. 2, the optical transceiver device 20 provided by the second embodiment of the present invention, the optical transceiver device 20 is similar to the optical transceiver device 10 provided by the first embodiment of the present invention, it includes at least one optical transceiver module 200, each The optical transceiver modules 200 all include an optical emitting module 42, an optical receiving module 44, and two optical circulators 46 (similar to the first optical circulator 26 and the second optical circulator 27 in the first embodiment) The connection relationship is the same and will not be repeated here).

The main difference between the optical transceiver device 20 and the optical transceiver device 10 provided by the first embodiment of the present invention is that the optical receiving module 44 is connected to the optical modulator 424 of the optical emitting module 42 .

The light receiving module 44 includes a photoelectric conversion element 442 such as a photodiode. The photoelectric conversion element 442 is used to receive the optical signal input to the optical receiving module 44, and then convert it into an electrical signal, and the electrical signal enters the optical modulator 42, and the light wave emitted by the optical emitting module 42 Perform remodulation, improve frequency response and optical gain, and improve signal transmission quality. Since the electrical signal obtained by the photoelectric conversion element 422 is also input into the optical modulator 42, the intensity of the electrical signal of the optical modulator 42 is enhanced. In this way, a certain frequency band that may be attenuated will be strengthened and supplemented, and the frequency response will be improved, and there is no need to add an additional electrical signal source, and the photoelectric conversion element 442 can be directly used, which can reduce the cost.

Please refer to FIG. 3 , the optical transceiver module 50 provided by the third embodiment of the present invention includes at least one optical transceiver module 600, each optical transceiver module 600 includes an optical transmitter module 62, an optical receiver module 64, and two optical circulators 66 (the connection relationship between the first optical circulator 26 and the second optical circulator 27 in the first embodiment is the same, and will not be repeated here).

The light emitting module 62 includes a light source 620 and a light modulator 624 . The light source 620 and light modulator 624 are basically the same as those used in the previous two embodiments.

The light receiving module 64 is connected with the light modulator 624 of the light emitting module 62 . The light receiving module 64 includes a photoelectric conversion element 642 such as a photodiode. The photoelectric conversion element 42 is used to receive the optical signal input to the optical receiving module 44, and then convert it into an electrical signal, and the electrical signal enters the optical modulator 62, and is then controlled by the optical modulator 624. The light wave emitted by the light source 620 is modulated, that is, different from the first and second embodiments, this embodiment modulates the light wave according to the electrical signal obtained by the photoelectric conversion of the light receiving module 64, that is, it can be modulated according to another The electrical signal obtained from the optical signal sent by one end (such as a user, an end user) passively modulates the light wave emitted by the optical emitting module 62, instead of actively modulating the end of the optical transceiver module 50, so that The number and volume of components in the light emitting module 62 are reduced.

In the present invention, the optical circulator is used as the light output mechanism of the transmitting module, and also as the light receiving mechanism of the receiving module to form the optical transceiver device of the present invention. The integrated transceiver module of the transmission re-modulation mechanism and the transceiver module that uses the regulated electrical signal of the received light source as the modulation signal of the transmitter both integrate the optical transmitter module and the optical receiver module together to reduce the number of components , Improve the degree of modularization, improve the performance of the module and the quality of optical signal transmission, easy to integrate and combine with other electronic products, and improve the compatibility of optical communication modules.

It can be understood that those skilled in the art can also make other changes within the spirit of the present invention, and such changes should be included within the scope of protection claimed by the present invention.

Claims (6)

1. An optical transceiver, comprising at least one optical transceiver module, the at least one optical transceiver module includes an optical transmitter module and an optical receiver module, the optical transmitter module includes a light source module and an optical module Modulator, the light receiving module includes a photoelectric conversion element, characterized in that: The at least one optical transceiver module also includes: A first optical circulator and a second optical circulator, the first and second optical circulators respectively include three ports, all of which are used to guide light sequentially or sequentially between two adjacent ports among the three ports In and out in reverse order, one port of the first optical circulator is connected to one port of the second optical circulator, and the other two ports of the first optical circulator are respectively connected to the optical modulator and the photoelectric conversion element, the The first optical circulator and the second optical circulator make the light emitted by the light emitting module and the light received by the light receiving module form an optical path that does not interfere with each other; and An electrical signal source connected to the optical modulator, the electrical signal source transmits the electrical signal to be loaded to the optical modulator to modulate the light wave emitted by the light source module. 2. The optical transceiver device according to claim 1, wherein the at least one optical transceiver module further comprises a switch connected to the optical transceiver module and the optical transmitter module for selectively Turn on the light-emitting module or the light-receiving module. 3. The optical transceiver device according to claim 1, characterized in that: the photoelectric conversion element is connected to the optical modulator, and the photoelectric conversion element is used to convert the light received by the optical receiving module into an electrical signal and The electric signal is sent to the light modulator to modulate the light wave emitted by the light source module. 4. The optical transceiver device according to any one of claims 1-3, wherein the optical modulator performs phase modulation or frequency modulation on the light wave emitted by the light source module. 5. An optical transceiver, comprising at least one optical transceiver module, the at least one optical transceiver module includes an optical transmitter module and an optical receiver module, the optical transmitter module includes a light source module and an optical module Modulator, the light receiving module includes a photoelectric conversion element, characterized in that: The photoelectric conversion element is connected to the optical modulator, and the electrical signal converted by the photoelectric conversion element enters the optical modulator to modulate the light wave emitted by the light source module; The at least one optical transceiver module also includes a first optical circulator and a second optical circulator, and the first and second optical circulators respectively include three ports, all of which are used to guide light in the three ports to communicate with each other. Two adjacent ports enter and exit sequentially or in reverse order, one port of the first optical circulator is connected to one port of the second optical circulator, and the other two ports of the first optical circulator are respectively connected to the optical modulation The first optical circulator and the second optical circulator make the light emitted by the light-emitting module and the light received by the light-receiving module form an optical path that does not interfere with each other. 6. The optical transceiver device according to claim 5, wherein the optical modulator performs phase modulation or frequency modulation on the light wave emitted by the light source module.

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