CN220820297U

CN220820297U - Optical component and optical device for multichannel same-wavelength transmission

Info

Publication number: CN220820297U
Application number: CN202322499767.0U
Authority: CN
Inventors: 郝屹; 庄礼辉; 孙路鲁; 帅欣; 贾朝波
Original assignee: Source Photonics Chengdu Co Ltd
Current assignee: Source Photonics Chengdu Co Ltd
Priority date: 2023-09-14
Filing date: 2023-09-14
Publication date: 2024-04-19
Anticipated expiration: 2033-09-14

Abstract

The utility model relates to an optical component and an optical device for multichannel same-wavelength transmission, wherein the optical component comprises a circulator, a wave separator and a wave combiner; the emitted light signals with at least two wavelengths are combined into a beam of composite light signals through the wave combiner, and then are incident from a first port of the circulator and output from a second port of the circulator; and after the composite optical signal incident from the third port of the circulator is output from the fourth port of the circulator, the composite optical signal is demultiplexed into at least two wavelength received optical signals by the demultiplexer. The utility model can realize the same wavelength of the received and emitted optical signals, and then realize the double arrangement of the same light source, thereby improving the utilization rate of the light source.

Description

Optical component and optical device for multichannel same-wavelength transmission

Technical Field

The present utility model relates to the field of optical communications technologies, and in particular, to an optical component and an optical device for multichannel co-wavelength transmission.

Background

In the existing network distribution structure, the single-fiber bidirectional transmission can double the throughput rate of the network, so that the single-fiber bidirectional optical component is widely applied. However, the conventional single-fiber bidirectional system can only realize the emission and the reception of optical signals with different wavelengths, namely, uplink and downlink wavelengths are different, and the optical signals with two wavelengths are separated by the two-color filter.

Disclosure of utility model

The utility model aims to solve the problem that a single-fiber bidirectional system in the prior art can only realize the transmission and the reception of optical signals with different wavelengths, and provides an optical component for multichannel same-wavelength transmission and an optical device adopting the optical component, which can realize the transmission and the reception of the same wavelength.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:

In a first aspect, the present utility model provides an optical assembly for multichannel co-wavelength transmission, comprising a circulator, a demultiplexer and a multiplexer; the emitted light signals with at least two wavelengths are combined into a beam of composite light signals through the wave combiner, and then are incident from a first port of the circulator and output from a second port of the circulator; and after the composite optical signal incident from the third port of the circulator is output from the fourth port of the circulator, the composite optical signal is demultiplexed into at least two wavelength received optical signals by the demultiplexer.

In the scheme, on one hand, the circulator is arranged, and the received optical signals and the emitted optical signals are respectively emitted from different ports, so that the same receiving and emitting optical signals can be realized, namely the same wavelength optical signals can be received and emitted, the same wavelength light source can be used in multiple, and the utilization rate of the light source is improved; on the other hand, through the cooperation of the wave separator and the wave synthesizer, the two-way transmission of the multichannel signal can be realized, and the data transmission rate and the frequency spectrum utilization rate are improved.

In the above solution, the first, second, third and fourth ports are only used for convenience of description, and the first port, the second port, the third port and the fourth port may be independent ports, or may be the same port in common, for example, the following technical solutions:

The second port and the third port are the same port, and the first port, the second port and the fourth port are respectively positioned on different sides. In the scheme, a three-port circulator is adopted, and the optical signal is received and transmitted by sharing one port.

In a further optimized scheme, the optical fiber coupler further comprises a reflecting prism, wherein the reflecting prism is arranged between the circulator and the combiner in an optical path, and the composite optical signals of at least two wavelengths after the light signals are combined are reflected by the reflecting prism and then are incident from a first port of the circulator.

In the scheme, the transmission direction of the optical signal is changed by arranging the reflecting prism, so that the devices are better arranged, and the space structure in a certain direction or the whole space structure is reduced as much as possible.

In a further preferred embodiment, the reflecting prism is integrated with the circulator. In this scheme, through integrating reflecting prism and circulator in an organic whole, the equipment just can accomplish the assembly to reflecting prism and circulator simultaneously once when convenient assembly, improves assembly efficiency.

In a further optimized scheme, the device further comprises a substrate, and the circulator, the wave separator and the wave combiner are uniformly arranged on the substrate.

In a further preferred embodiment, the optical signal output from the second port or the optical signal incident from the third port is coupled by means of a collimator. In the scheme, the collimator is arranged at the second (third) port, so that the transmitted and received optical signals can be output after being collimated, and the transmission quality of the optical signals is improved.

In a second aspect, an embodiment of the present utility model further provides an optical device, including a laser, an optical receiver, and an optical component according to any one of the embodiments.

In a third aspect, an embodiment of the present utility model provides an optical module, including the optical device.

Compared with the prior art, the utility model integrates the circulator, the multichannel combiner and the demultiplexer by adopting a free space optical method, thereby realizing the receiving and transmitting of multichannel optical signals with the same wavelength, improving the utilization rate of a light source, and the optical component is small and compact, can couple input and output optical signals into an optical fiber through a collimator, and is convenient for integration with other systems.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and other related drawings can be obtained according to the drawings without inventive effort for a person skilled in the art, but all fall within the scope of protection of the present utility model.

Fig. 1a is a schematic structural diagram of an optical component in an embodiment.

FIG. 1b is a schematic view of the circulator of FIG. 1 a.

Fig. 2 is a schematic structural diagram of another optical component in an embodiment.

Fig. 3 is a schematic structural view of another optical component in an embodiment.

Fig. 4 is a schematic structural view of another optical component in an embodiment.

Fig. 5 is a schematic structural view of another optical component in an embodiment.

The marks in the figure: 1-a circulator; 2-reflecting prisms; a 3-combiner; 4-wave separator; a 5-substrate; a 6-collimator; 7-optical fiber.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

Referring to fig. 1a, an optical component for multi-channel co-wavelength transmission is provided in this embodiment, which includes a circulator 1, a reflecting prism 2, a demultiplexer 4, a combiner 3, and a substrate 5, where the circulator 1, the reflecting prism 2, the demultiplexer 4, and the combiner 3 are all disposed on the substrate 5.

As shown in fig. 1b, the circulator 1 includes a first port (Tx port), a second port (comport), and a fourth port (Rxport) located at different sides, respectively, from which a transmitted optical signal is incident and output, and from which a received optical signal is incident and output. In this embodiment, a three-port circulator 1 is used, and one port is shared, or a four-port circulator 1 may be used, where different ports are used for transmitting and receiving optical signals.

In this embodiment, the combiner 3 and the demultiplexer 4 each include a prism for returning light and a plurality of filters to combine multiple wavelengths. In this embodiment, beam combination and beam splitting of the four-channel optical signal are implemented, so that the number of optical filters is 4, as shown in fig. 1 a. Tx1 to Tx4 and Rx1 to Rx4 each represent a channel with a different center wavelength, for example, the center wavelengths are respectively lambda 1, lambda 2, lambda 3 and lambda 4. Of course, in the present embodiment, four channels are taken as an example, and other channel numbers, such as 2 channels, 8 channels, etc., may be used, and the number of filters is correspondingly changed along with the change of the channel number. The center wavelengths of the operation of the multiplexer 3 and the demultiplexer 4 are the same, for example, λ1, λ2, λ3, and λ4, but the order of the channels is not required to be completely identical.

In the structure shown in fig. 1a, the optical signals (such as λ1 to λ4) of Tx1 to Tx4 are respectively incident from the optical filters of the corresponding wave combiners to the prism of the wave combiners, λ1 is reflected and converged with λ2, and then is reflected and converged with λ3, and then is reflected and converged with λ4, and the combined beam is a composite optical signal, and is incident to the reflecting prism 2, reflected by the reflecting prism 2 and then is incident to the circulator 1 from Tx port, and is reflected by the 1/2 wave plate in the circulator 1 and then is output from comport. The received composite optical signal is incident from comport of the circulator 1, reflected by a 1/2 wave plate in the circulator 1, output to a prism of the demultiplexer 4 from an Rx port, and sequentially demultiplexed into λ4, λ3, λ2, λ1, and λ1 to λ4, and respectively emitted from the corresponding optical filters.

By arranging the circulator, the received optical signals and the emitted optical signals are respectively emitted from different ports, so that the receiving and the emitting of the optical signals with the same wavelength can be realized, the light source with the same wavelength can be used in multiple, and the utilization rate of the light source is improved. And through the cooperation of the wave separator and the wave combiner, the two-way transmission of the multichannel signal can be realized, and the data transmission rate and the frequency spectrum utilization rate are improved.

In the structure shown in fig. 1a, a reflecting prism 2 is disposed between a circulator 1 and a combiner 3 in the optical path, for changing the transmission direction of the emitted optical signal; as another embodiment, it may be disposed between the circulator 1 and the demultiplexer 4 to change the transmission direction of the received optical signal. The specific structure or arrangement of the reflecting prism 2 is not particularly limited, and a reflecting surface may be provided to reflect the emitted light signal or the received light signal, and as shown in fig. 1a and 5, two reflecting prisms of different structures are provided, respectively.

In this embodiment, the purpose of the reflecting prism 2 is to change the transmission direction of the optical signal, so as to save lateral space (only the orientation shown in fig. 1 is used as a reference). As another embodiment, the reflecting prism 2 may be omitted, and the arrangement position of the combiner 3 or the demultiplexer 4 needs to be changed, for example, for the structure shown in fig. 1a, where the combiner 3 needs to be laterally arranged, so that the composite optical signal obtained by combining the beams may be incident on the circulator 1 from the Tx port.

In the structure shown in FIG. 1a, comport and Tx port are arranged opposite to each other, and the optical axis angle of the 1/2 wave plate in circulator 1 can be changed to make comport and Rx port arranged opposite to each other, as shown in FIG. 2.

As shown in fig. 3, the positions Txport and Rxport of the 1/2 wave plates in the circulator 1 can be interchanged, and the positions of the combiner 3 and the splitter 4 are interchanged correspondingly.

In the structures shown in fig. 1a and fig. 2-3, the circulator 1 and the reflecting prism 2 are separate devices. As shown in fig. 4, the circulator 1 and the reflecting prism 2 may be integrated, and by means of integration, synchronous assembly may be realized, thereby improving assembly efficiency.

As shown in fig. 5, on the basis of the structure shown in fig. 1a, a collimator 6 may be disposed on comport of the circulator 1, or a collimator 6 may be disposed in front of the filters of the demultiplexer 4 and the combiner 3, and a channel corresponds to one collimator 6. By arranging the collimator 6, the input and output light beams are coupled into the optical fiber 7 through the collimator 6. The interface at the other end of the optical fiber 7 can be designed into different forms, such as a pin, LC, FC and the like, according to the needs, so that the interface is conveniently integrated with other systems.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model.

Claims

1. An optical component for multichannel same-wavelength transmission is characterized by comprising a circulator, a wave separator and a wave combiner; the emitted light signals with at least two wavelengths are combined into a beam of composite light signals through the wave combiner, and then are incident from a first port of the circulator and output from a second port of the circulator; and after the composite optical signal incident from the third port of the circulator is output from the fourth port of the circulator, the composite optical signal is demultiplexed into at least two wavelength received optical signals by the demultiplexer.

2. The optical module for multichannel co-wavelength transmission of claim 1, wherein the second port and the third port are the same port, and the first port, the second port, and the fourth port are located on different sides, respectively.

3. The optical assembly for multichannel, same-wavelength transmission of claim 2, wherein the first port and the second port are disposed in opposition; or the fourth port and the second port are arranged oppositely.

4. The optical assembly for multichannel co-wavelength transmission of claim 1, wherein the locations of the first port and the fourth port are interchanged, and the locations of the splitter and the combiner are interchanged.

5. The optical assembly for multi-channel co-wavelength transmission according to claim 1, further comprising a reflecting prism disposed in the optical path between the circulator and the combiner, wherein the composite optical signal of the at least two wavelengths of the emitted optical signals after being combined is incident from the first port of the circulator after being reflected by the reflecting prism.

6. The optical module for multi-channel co-wavelength transmission according to claim 1, further comprising a reflecting prism disposed between the circulator and the demultiplexer in the optical path, wherein the composite optical signal incident from the third port of the circulator is output from the fourth port, reflected by the reflecting prism, and then incident to the demultiplexer.

7. The optical assembly for multichannel co-wavelength transmission of claim 5 or 6, wherein said reflective prism is integral with said circulator.

8. The optical assembly for multichannel co-wavelength transmission of claim 1, further comprising a substrate, wherein the circulator, the demultiplexer, and the combiner are disposed on the substrate.

9. The optical assembly for multichannel co-wavelength transmission of claim 1, further comprising a collimator through which the optical signal output from the second port or the optical signal incident from the third port is coupled.

10. An optical device comprising a laser, an optical receiver, and an optical assembly for multichannel co-wavelength transmission according to any of claims 1-9.