CN218938575U

CN218938575U - Multiplexing light emission submodule

Info

Publication number: CN218938575U
Application number: CN202223198618.2U
Authority: CN
Inventors: 唐永正
Original assignee: Wuhan Inphilight Technology Co Ltd
Current assignee: Wuhan Inphilight Technology Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-28
Anticipated expiration: 2032-11-30

Abstract

The utility model relates to the technical field of optical communication and provides a multiplexing optical emission sub-module which comprises a plurality of lasers and a plurality of collimating lenses corresponding to the lasers one by one, and further comprises an optical multiplexing assembly, wherein one light incidence end of the optical multiplexing assembly is provided with a plurality of band-pass filters, the number of each band-pass filter is half of that of each laser, light emitted by each laser is obliquely emitted to one band-pass filter after being collimated by the corresponding collimating lens, and the light multiplexing assembly synthesizes oblique light beams to be emitted from the emergent end of the optical multiplexing assembly, and the number of the synthesized oblique light beams is one quarter of that of the lasers; and a wedge block for shifting the combined inclined light beam into a horizontal light beam is arranged at the emergent end of the light multiplexing component. The utility model reduces the use of optical multiplexing components, reduces the space occupation of optical elements and reduces the material cost.

Description

Multiplexing light emission submodule

Technical Field

The utility model relates to the technical field of optical communication, in particular to a multiplexing optical emission sub-module.

Background

With the increasing update of 5G communication technology, the demands on high-speed modules such as 25G, 100G, 200G, 400G and the like in the market are increasing, the competition in the market is also increasing, and the cost control demands on the high-speed modules are also increasing;

current 100G, 200G, 400G, 800G products basically employ multiplexing techniques to further increase the rate of individual modules. At most, 8-way multiplexing is sometimes used. Multiplexing is basically a MUX (optical multiplexing component) based on TFF (thin film filtering), and when the number of multiplexing paths increases, the size of the MUX increases, and the occupied space increases. Fig. 1 is a conventional 2 x 4 multiplexing optical emission sub-module, in which 2 groups of 4 CWDM wavelengths are respectively combined into one output by MUX. It requires two muxes, which occupy a large space and are costly.

Disclosure of Invention

The present utility model aims to provide a multiplexing optical emission sub-module, which can at least solve some of the drawbacks of the prior art.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions: the multiplexing light emission submodule comprises a plurality of lasers and a plurality of collimating lenses which are in one-to-one correspondence with the lasers, and further comprises a light multiplexing assembly, wherein one light incidence end of the light multiplexing assembly is provided with a plurality of band-pass filters, the number of the band-pass filters is half of that of the lasers, light emitted by each laser is obliquely emitted to one band-pass filter after being collimated by the corresponding collimating lens, and the light multiplexing assembly synthesizes oblique light beams to be emitted from the emergent end of the light multiplexing assembly, and the number of the synthesized oblique light beams is one fourth of that of the lasers; and a wedge block for shifting the combined inclined light beam into a horizontal light beam is arranged at the emergent end of the light multiplexing component.

Further, each laser is arranged in a straight line in turn, each two lasers form a group from one end of the straight line in sequence, and in each group of lasers, light emitted by the two lasers is crossed and symmetrically arranged along a perpendicular bisector between the two lasers.

Further, from one end of the straight line, the light emitted by the odd number of lasers is arranged obliquely downward along the horizontal line, and the light emitted by the even number of lasers is arranged obliquely upward along the horizontal line.

Further, the light emitted from the odd-numbered lasers is inclined downward by-8 ° or-13.5 ° along the horizontal line, and the light emitted from the even-numbered lasers is inclined upward by 8 ° or 13.5 ° along the horizontal line.

Further, two wedge blocks are arranged at intervals, and the two wedge blocks are respectively arranged at the opposite edges of the light emitting end of the light multiplexing component.

Further, the optical system further comprises a converging lens and an optical isolator which are sequentially arranged along the light path direction, and light emitted by the wedge-shaped block sequentially passes through the converging lens and the optical isolator.

Further, the laser, the collimating lens, the optical multiplexing component, the band-pass filter, the wedge block, the converging lens and the optical isolator are all arranged in the shell.

Further, an optical fiber adapter is arranged outside the shell, and light emitted by the optical isolator enters the optical fiber adapter.

Further, the number of the lasers and the collimating lenses is eight, the number of the band-pass filters is four, and the number of the synthesized oblique light beams is two.

Compared with the prior art, the utility model has the beneficial effects that: a multiplexing light emission sub-module reduces the use of light multiplexing components, reduces the space occupation of optical elements, and reduces the material cost.

Drawings

Fig. 1 is a schematic diagram of an optical path of a conventional 8-way multiplexing optical transmitting sub-module;

fig. 2 is a schematic diagram of an optical path of a multiplexed optical transmit sub-module according to an embodiment of the present utility model;

in the reference numerals: 1-a laser; 2-a collimating lens; a 3-optical multiplexing component; 4-a band-pass filter; 5-wedge blocks; 6-converging lenses; 7-an optical isolator; 8-a fiber optic adapter; 9-a shell.

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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 2, an embodiment of the present utility model provides a multiplexing optical emission sub-module, which includes a plurality of lasers 1 and a plurality of collimating lenses 2 corresponding to the lasers 1 one by one, and further includes an optical multiplexing component 3, wherein a light incident end of the optical multiplexing component 3 is provided with a plurality of bandpass filters 4, the number of the bandpass filters 4 is half of the number of the lasers 1, light emitted by each of the lasers 1 is collimated by the corresponding collimating lens 2 and then obliquely emitted to one of the bandpass filters 4, and an oblique light beam is synthesized by the optical multiplexing component 3 and emitted from an emitting end of the optical multiplexing component 3, and the number of the synthesized oblique light beam is one quarter of the number of the lasers 1; a wedge 5 for shifting the combined oblique light beam to a horizontal light beam is provided at the exit end of the light multiplexing assembly 3. In the present embodiment, the outgoing angle of the light emitted by the laser 1 is skillfully changed by using the collimator lens 2, so that the number of light multiplexing components 3 can be reduced, the space occupation is reduced, and the cost is reduced.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 2, each of the lasers 1 is arranged in a shape of a straight line in sequence, and each two lasers 1 form a group in sequence from one end of the straight line, and in each group of lasers 1, the light emitted by the two lasers 1 intersect and are symmetrically arranged along a perpendicular bisector between the two lasers 1. In this embodiment, the light emitted by the two lasers 1 is disposed in a crossing manner, so that it is ensured that one optical multiplexing component 3 combines multiple paths of light.

Further optimizing the above scheme, referring to fig. 2, from one end of the straight line, the light emitted by the odd number of lasers 1 is arranged obliquely downward along the horizontal line, and the light emitted by the even number of lasers 1 is arranged obliquely upward along the horizontal line. The light emitted from the odd number of lasers 1 is inclined downward by-8 ° or-13.5 ° along the horizontal line, and the light emitted from the even number of lasers 1 is inclined upward by 8 ° or 13.5 ° along the horizontal line. In this embodiment, the angle of inclination may be designed to be optimal at 8 °.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 2, two wedge-shaped blocks 5 are provided, two wedge-shaped blocks 5 are disposed at intervals, and two wedge-shaped blocks 5 are respectively disposed at an opposite edge of the light emitting end of the light multiplexing component 3. In this embodiment, two wedge blocks 5 can be designed to fit eight lasers 1. It is of course also possible to provide one, and the deflection of the optical path can be controlled by adjusting the angle or the material of the incident surface and the exit surface of the wedge-shaped block 5. The collimator lens 2 controls the shift of the optical path (the shift is relative to the horizontal light) by the principle as described above.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 2, the optical fiber refraction device further includes a converging lens 6 and an optical isolator 7 sequentially arranged along the optical path direction, and the light emitted from the wedge-shaped block 5 sequentially passes through the converging lens 6 and the optical isolator 7. The laser 1, the collimating lens 2, the optical multiplexing component 3, the band-pass filter 4, the wedge 5, the converging lens 6 and the optical isolator 7 are all arranged in a shell 9. The optical fiber adapter 8 is arranged outside the shell 9, and light emitted by the optical isolator 7 enters the optical fiber adapter 8. In this embodiment, the components may be mounted on the housing 9, with coupling to the fiber optic adapter 8 outside the housing 9 being achieved inside the housing 9.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 2, there are eight lasers and collimating lenses, four band-pass filters, and two combined oblique light beams. In this embodiment, multiplexing of eight light beams emitted by eight lasers is shown, and in other multiplexing, the number of light multiplexing components can be reduced only by limiting the light emitting angle by the collimating lens and performing light offset by matching with the wedge block.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multiplexed optical emission sub-module comprising a plurality of lasers and a plurality of collimating lenses in one-to-one correspondence with each of the lasers, characterized in that: the laser device also comprises a light multiplexing component, wherein a plurality of band-pass filters are arranged at the light incidence end of the light multiplexing component, the number of each band-pass filter is half of that of each laser, the light emitted by each laser is collimated by the corresponding collimating lens and then obliquely emitted to one band-pass filter, and the light multiplexing component synthesizes inclined light beams to be emitted from the emitting end of the light multiplexing component, wherein the number of the synthesized inclined light beams is one fourth of the number of the lasers; and a wedge block for shifting the combined inclined light beam into a horizontal light beam is arranged at the emergent end of the light multiplexing component.

2. A multiplexed optical transmit sub-module as claimed in claim 1, wherein: each laser is arranged in a straight line in sequence, one end of the straight line is sequentially arranged, each two lasers form a group, and in each group of lasers, light emitted by the two lasers is crossed and symmetrically arranged along a perpendicular bisector between the two lasers.

3. A multiplexed optical transmit sub-module as claimed in claim 2, wherein: the light emitted from the odd-numbered lasers is arranged obliquely downwards along the horizontal line, and the light emitted from the even-numbered lasers is arranged obliquely upwards along the horizontal line from one end of the straight line.

4. A multiplexed optical transmit sub-module as claimed in claim 3, wherein: the light emitted from the odd number of lasers is inclined downward by-8 ° or-13.5 ° along the horizontal line, and the light emitted from the even number of lasers is inclined upward by 8 ° or 13.5 ° along the horizontal line.

5. A multiplexed optical transmit sub-module as claimed in claim 1, wherein: the two wedge blocks are arranged at intervals, and the two wedge blocks are respectively arranged at the opposite edges of the light emitting end of the light multiplexing component.

6. A multiplexed optical transmit sub-module as claimed in claim 1, wherein: the optical system further comprises a converging lens and an optical isolator which are sequentially arranged along the light path direction, wherein light emitted by the wedge-shaped block sequentially passes through the converging lens and the optical isolator.

7. A multiplexed optical transmit sub-module as claimed in claim 6, wherein: the laser, the collimating lens, the light multiplexing component, the band-pass filter, the wedge block, the converging lens and the optical isolator are all arranged in the shell.

8. A multiplexed optical transmit sub-module as claimed in claim 7, wherein: the optical fiber adapter is arranged outside the shell, and light emitted by the optical isolator is incident into the optical fiber adapter.

9. A multiplexed optical transmit sub-module as claimed in claim 1, wherein: eight lasers and eight collimating lenses are arranged, four band-pass filters are arranged, and two combined oblique light beams are arranged.