CN-116009149-B - Optical multiplexing assembly and optical module

CN116009149BCN 116009149 BCN116009149 BCN 116009149BCN-116009149-B

Abstract

The application relates to the technical field of optical communication, in particular to an optical multiplexing assembly and an optical module, wherein the optical multiplexing assembly comprises a prism, the prism comprises a first reflecting surface and a second reflecting surface, the first reflecting surface and the second reflecting surface are arranged in parallel, a first side wall between the first reflecting surface and the second reflecting surface is an incident surface, a second side wall opposite to the first side wall is an emergent surface, at least two filters for passing incident light are arranged on the incident surface, a reflecting film and an antireflection film are arranged on the emergent surface, the first reflecting surface, the second reflecting surface and the emergent surface are positioned on an optical path of the incident light, and at least two incident lights passing through the filters are reflected by the first reflecting surface, the second reflecting surface and the reflecting film to be emitted by the antireflection film after being reflected by a synthetic wave Cheng Chushe. According to the light multiplexing component provided by the application, the light path is folded back at least once in the prism, so that the size of the prism along the propagation direction of the light path is greatly reduced, and the space occupied by the light multiplexing component is greatly reduced.

Inventors

TANG YONGZHENG
PI WENBO
LI BO
ZHU DEFENG
XIE DINGBO

Assignees

武汉英飞光创科技有限公司

Dates

Publication Date: 20260512
Application Date: 20221130

Claims (8)

1. The utility model provides a light multiplexing subassembly, its characterized in that includes the prism, the prism includes first reflecting surface and second reflecting surface, first reflecting surface with second reflecting surface parallel arrangement, first lateral wall between first reflecting surface and the second reflecting surface is the incident surface, for the second lateral wall that first lateral wall set up is the exit surface, be provided with two at least filter pieces that are used for incident light to pass through on the incident surface, be provided with reflective coating and antireflection coating that lay side by side on the exit surface, first reflecting surface, second reflecting surface and exit surface are located the light path of incident light, through at least two beams of incident light of filter piece pass through first reflecting surface, second reflecting surface and reflection coating reflection combiner Cheng Chushe light back is by the antireflection coating, first reflecting surface and second reflecting surface slope setting and have the difference in height between the two for the incident light takes place at least once in the prism, when the incident light's light path is higher than the light path of incident light in vertical direction.
2. The light multiplexing assembly of claim 1 wherein the light path of the outgoing light is parallel to the light path of the incoming light, the outgoing light being in line with the incoming light direction.
3. The light multiplexing assembly of claim 1 wherein incident light is totally reflected at the first reflective surface and the second reflective surface.
4. A light multiplexing assembly in accordance with claim 3 wherein the incident light is incident at an angle of less than 41.5 ° on the first reflective surface and a total reflection film is provided on the first and second reflective surfaces.
5. The light multiplexing assembly of claim 1 wherein the number of filters is four, the four filters being disposed side-by-side on the entrance face of the prism.
6. The utility model provides an optical module, includes two at least lasers, two at least collimating lens, light multiplexing subassembly, converging lens and optic fibre adapter, the collimating lens is located the light path of the emission light of laser, just collimating lens with the laser one-to-one sets up, light multiplexing subassembly will the outgoing light of collimating lens becomes a bundle of outgoing light, light multiplexing subassembly's outgoing light's light path has set gradually converging lens with the optic fibre adapter, its characterized in that, light multiplexing subassembly is the light multiplexing subassembly of any one of claims 1-5.
7. The light module of claim 6 further comprising an isolator disposed between the converging lens and the fiber adapter, the isolator being located on an exit optical path of the converging lens.
8. The optical module of claim 6, wherein the number of the lasers and the collimating lenses is four, and the four collimating lenses are respectively disposed on the outgoing light paths of the lasers.

Description

Optical multiplexing assembly and optical module Technical Field The present invention relates to the field of optical communications technologies, and in particular, to an optical multiplexing module and an optical 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 requirements on cost control of the high-speed modules are increasing. Currently, 100G, 200G, 400G, 800G products are basically multiplexed to further increase the speed of individual modules. At most, four-way multiplexing is basically a MUX (optical multiplexer) based on TFF (thin film filtering). Fig. 1 of the accompanying drawings is a typical four-way optical multiplexing module, which includes four thin film filters, glass bodies, and reflective and antireflection films on the light-emitting side. The optical paths of the light multiplexing component during operation are shown in fig. 1, light with four different wavelengths is incident from the corresponding filter sheets, and is synthesized into one path of light output after multiple foldback. The traditional optical multiplexing assembly is characterized in that the distance between each channel is related to the width of the glass block, the wider the glass block is, the larger the distance between each channel is, the larger the size of the glass block is, the width is more than 4mm, the occupied space is larger, the occupied space of the whole optical path is larger, and the layout of other elements of the optical module is affected. Disclosure of Invention In order to solve the above problems, in one aspect, the present invention provides a light multiplexing assembly, including a prism, where the prism includes a first reflecting surface and a second reflecting surface, the first reflecting surface and the second reflecting surface are disposed in parallel, a first side wall between the first reflecting surface and the second reflecting surface is an incident surface, a second side wall disposed opposite to the first side wall is an outgoing surface, at least two filters for passing incident light are disposed on the incident surface, a reflecting film and an antireflection film are disposed on the outgoing surface, the first reflecting surface, the second reflecting surface and the outgoing surface are located on a light path of the incident light, and at least two incident lights passing through the filters are reflected by the first reflecting surface, the second reflecting surface and the reflecting film to be emitted by the antireflection film after passing through a composite wave Cheng Chushe. Further, the first reflecting surface and the second reflecting surface are obliquely arranged, and a height difference exists between the first reflecting surface and the second reflecting surface. Further, the light path of the emergent light is parallel to the light path of the incident light, the emergent light is consistent with the incident light in direction, and the light path of the emergent light is higher than the light path of the incident light. Further, the incident light is totally reflected on the first reflecting surface and the second reflecting surface. Further, the incident angle of the incident light on the first reflecting surface is smaller than 41.5 degrees, and the total reflection films are arranged on the first reflecting surface and the second reflecting surface. Further, at least one turn-back occurs in the prism as the incident light passes through the prism. Further, the number of the filter plates is four, and the four filter plates are arranged on the incidence surface of the prism side by side. On the other hand, the invention also provides an optical module which comprises at least two lasers, at least two collimating lenses, an optical multiplexing assembly, a converging lens and an optical fiber adapter, wherein the collimating lenses are positioned on the light paths of the emitted light of the lasers, the collimating lenses are arranged in one-to-one correspondence with the lasers, the light multiplexing assembly synthesizes the emitted light of the collimating lenses into a beam of emitted light, the converging lens and the optical fiber adapter are sequentially arranged on the light paths of the emitted light of the optical multiplexing assembly, and the optical multiplexing assembly is the optical multiplexing assembly. Further, the optical module further comprises an isolator, wherein the isolator is arranged between the converging lens and the optical fiber adapter, and the isolator is positioned on an emergent light path of the converging lens. Further, the number of the lasers and the number of the collimating lenses are four, and the four collimating lenses are respectively arranged on the emergent light paths of the lasers. Compared with the prior a