WO2021056832A1

WO2021056832A1 - Optical module

Info

Publication number: WO2021056832A1
Application number: PCT/CN2019/124100
Authority: WO
Inventors: 李庭宇; 马洪勇; 熊芬; 苏敬奎; 周日凯; 付永安
Original assignee: 武汉光迅科技股份有限公司
Priority date: 2019-09-24
Filing date: 2019-12-09
Publication date: 2021-04-01
Also published as: CN110618504A

Abstract

An optical module (100). The optical module (100) comprises: a wave demultiplexing assembly (101, 601, 701), a coupling assembly (102, 602, 702), and a detector chip (103, 603, 703), wherein the wave demultiplexing assembly (101, 601, 701) is used for decomposing a received combined-wave parallel optical signal comprising at least two types of wavelengths into at least two single-wave parallel optical signals; the coupling assembly (102, 602, 702) is used for performing focused reflection processing on the at least two single-wave parallel optical signals, and focusing the at least two single-wave parallel optical signals after focused reflection processing on the detector chip (103, 603, 703); and the detector chip (103, 603, 703) is used for receiving the at least two single-wave parallel optical signals and converting the at least two single-wave parallel optical signals into an electrical signal.

Description

An optical module

Cross-references to related applications

This application is filed based on a Chinese patent application with an application number of 201910905022.5 and an application date of September 24, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by reference.

Technical field

The present disclosure relates to the field of optical communication technology, and in particular to an optical module.

Background technique

With the rapid development of optical communication and Internet technologies, people’s demand for network traffic is getting higher and higher. As the core optical module for data exchange in optical communication networks, its transmission capacity and transmission rate also urgently need to be further improved.

At present, the traditional 100Gb/s receiving optical module generally uses a single or two lenses to collimate and focus the optical path. However, when the speed of the optical module (up to 400Gb/s) and the number of channels are greatly increased, its optical coupling tolerance It is small and difficult to encapsulate, which is not enough to meet the requirements of mass manufacturing and high reliability.

Summary of the invention

In view of this, the main purpose of the present disclosure is to provide an optical module with good optical tolerance, simple structural packaging method, and capable of meeting the requirements of mass manufacturing and high reliability.

In order to achieve the above objective, the technical solution of the present disclosure is achieved as follows:

The embodiment of the present disclosure provides an optical module, the optical module includes: a wave division multiplexing component, a coupling component, and a detector chip; wherein,

The wavelength division multiplexing component is used to decompose a received parallel optical signal containing at least two wavelengths into at least two parallel single-wavelength optical signals;

The coupling component is configured to perform focus reflection processing on the at least two channels of single-wave parallel light signals, and focus the at least two channels of single-wave parallel light signals after the focus and reflection processing on the detector chip;

The detector chip is configured to receive the at least two channels of single-wave parallel optical signals, and convert the at least two channels of single-wave parallel optical signals into electrical signals.

In the above solution, the coupling component includes: a first focusing lens, a second focusing lens, and a reflecting prism;

The first focusing lens, the second focusing lens, and the reflecting prism are in a first relative position; wherein, the first relative position is the image formed by the focal point of the first focusing lens through the reflecting prism, and the The position where the image formed by the detector chip passing through the second focusing lens overlaps.

In the above solution, the first focusing lens is used to focus the at least two single-wave parallel light signals onto the reflecting prism;

The reflecting prism is used to reflect the at least two single-wave parallel light signals to the second focusing lens;

The second focusing lens is used to focus the at least two single-wave parallel optical signals onto the detector chip.

In the above solution, the first focusing lens and the second focusing lens each include a first surface and a second surface, and the first surface and the second surface are opposite surfaces; the first surface is a flat surface, and the second surface is opposite. The two sides are convex.

In the above solution, the image formed by the focal point of the first focusing lens through the reflecting prism is the same as at least two paths of single-wave parallel light after the focusing processing of the first focusing lens and the reflecting processing of the reflecting prism. The focal points of the light paths of the signals coincide.

In the above solution, the optical module further includes: a collimating lens;

The collimating lens is used to receive a multiplexed optical signal containing at least two wavelengths, and collimate the multiplexed optical signal containing at least two wavelengths into parallel light to obtain a multiplexed parallel optical signal containing at least two wavelengths An optical signal, transmitting the multiplexed parallel optical signal containing at least two wavelengths.

In the above solution, the collimating lens and the optical port that emits a multiplexed optical signal containing at least two wavelengths are in a second relative position; wherein, the second relative position is the focal point of the collimating lens and the The position where the optical center of the optical port coincides.

In the above solution, the optical module further includes: a turning prism;

The turning prism is configured to receive the multiplexed parallel optical signal containing at least two wavelengths after the collimation processing of the collimating lens, and forward the multiplexed parallel optical signal containing at least two wavelengths to the pre- The direction is shifted by a preset distance, and the output is sent to the wave splitting and multiplexing component.

In the above solution, the focal point of the second focusing lens is located below the image formed by the reflecting prism by the focal point of the first focusing lens.

In the above solution, the number of channels of the first focusing lens and the second focusing lens is the same as the number of optical paths of the at least two single-wave parallel optical signals.

The optical module provided by the embodiment of the present disclosure decomposes a combined parallel optical signal containing at least two wavelengths through the wave decomposition multiplexing component to obtain at least two single-wave parallel optical signals; The at least two channels of single-wave parallel light signals are subjected to focusing and reflection processing, and the at least two channels of single-wave parallel light signals after the focusing and reflection processing are focused on the detector chip to realize the reception of the optical signals. In this way, through the combined action of the wave division multiplexing component and the coupling component, the optical module can have a larger optical coupling tolerance, so that the received optical signal can be accurately focused on the detector chip.

Description of the drawings

FIG. 1 is a schematic structural diagram of an optical module provided by an embodiment of the disclosure;

2 is a schematic diagram of a 3D structure of an optical module provided by an embodiment of the disclosure;

Fig. 3 is a schematic side view of a 3D structure of a coupling component in an optical module provided by an embodiment of the disclosure;

4 is a schematic diagram of an optical path of a coupling component in an optical module provided by an embodiment of the disclosure;

5 is a schematic diagram of an optical path between a collimating lens and an optical port in an optical module provided by an embodiment of the disclosure;

6 is a schematic diagram of the overall optical path of an optical module provided by an embodiment of the disclosure;

FIG. 7 is a schematic diagram of the overall optical path of another optical module provided by an embodiment of the disclosure;

FIG. 8 is a schematic structural diagram of a 3D application example of an optical module provided by an embodiment of the disclosure;

9 is a perspective view of a 3D structure of a coupling component in an optical module provided by an embodiment of the disclosure;

FIG. 10 is a perspective view of a 3D structure of an optical module provided by an embodiment of the disclosure.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are a part of the embodiments of the present disclosure, but not all of the embodiments.

Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In order to achieve a better optical coupling tolerance, an embodiment of the present disclosure provides an optical module. FIG. 1 is a schematic structural diagram of an optical module provided by an embodiment of the present disclosure. As shown in FIG. 1, the optical module 100 includes ：Wave decomposition multiplexing component 101, coupling component 102 and detector chip 103; among them,

The wavelength division multiplexing component 101 is configured to decompose a received multiplexed parallel optical signal containing at least two wavelengths into at least two single-wavelength parallel optical signals;

The coupling component 102 is configured to perform focus reflection processing on the at least two channels of single-wave parallel light signals, and focus the at least two channels of single-wave parallel light signals after the focus and reflection processing on the detector chip 103;

The detector chip 103 is configured to receive the at least two channels of single-wave parallel optical signals, and convert the at least two channels of single-wave parallel optical signals into electrical signals.

It should be noted that the optical module 100 in the embodiment of the present disclosure can be used in a high-speed optical receiving device.

The multiplexed parallel optical signal containing at least two wavelengths received by the wavelength division multiplexing component 101 is a parallel collimated optical signal. Here, the parallel collimation processing of the optical signal can be realized by the collimating lens; that is, the multiplexed parallel optical signal containing at least two wavelengths received by the wavelength division multiplexing component 101 may be collimated by the collimating lens. owned.

The wavelength division multiplexing component 101 is used to realize the decomposition of the composite optical signal, and decompose the composite optical signal into a plurality of single-wave optical signals. The wave division multiplexing component 101 includes an incident end face and an exit end face.

The incident end surface of the wavelength division multiplexing component 101 is used to receive a combined parallel light signal containing at least two wavelengths, and the exit end surface of the wavelength division multiplexing component 101 is used to emit the at least two single-wave parallel light signals. signal. For example, a beam of multiplexed parallel optical signals containing 4 wavelengths is incident on the incident end surface of the wavelength division multiplexing component 101, and after the demultiplexing processing of the wavelength division multiplexing component 101, The emitting end face of the component 101 emits 4 single-wave parallel optical signals of different wavelengths.

The focusing and reflection processing includes focusing processing and reflection processing; wherein, the focusing processing refers to processing the at least two single-wave parallel light signals through a focusing lens to achieve focusing of the optical path; the reflection processing refers to using a reflective prism The processing of the at least two single-wave parallel optical signals is performed to realize the reflection of the optical path.

Here, through the combined action of the wavelength division multiplexing component 101 and the coupling component 102, the optical signal can be accurately focused on the detector chip 103. The entire optical element relies on the optical path structure and has a large optical coupling tolerance.

It should be noted that, as described above, in order to collimate the divergent light signal into a parallel light signal; the optical module further includes: a collimating lens; the collimating lens is used to receive a combined light signal containing at least two wavelengths. Wave optical signal, collimate the multiplexed optical signal containing at least two wavelengths into parallel light to obtain a multiplexed parallel optical signal containing at least two wavelengths, and emit the multiplexed parallel light containing at least two wavelengths signal.

The one-way multiplexed optical signal containing at least two wavelengths received by the collimator lens may be emitted from an optical port; the optical port may be in a shape of a circle, a square, or the like. Specifically, the optical port is an optical receiving port, and the optical port may be a part of the above-mentioned optical module for receiving a multiplexed optical signal containing at least two wavelengths emitted or transmitted by other laser devices, optical fibers, etc.

Optionally, the optical module may further include: a turning prism; the turning prism is configured to receive the one-way multiplexed parallel optical signal containing at least two wavelengths after the collimation processing of the collimating lens, and combine all The multiplexed parallel optical signal containing at least two wavelengths is translated by a preset distance in a preset direction and sent to the wave division multiplexing component.

It should be noted that the existence of the turning prism can simplify the structural design of the high-speed optical module, reduce the limitation of the structural design, and improve the flexibility of the optical path structure and the mechanical structure.

The preset direction may be a vertical direction such as upward and downward, and the preset distance may be any distance, which can be set according to actual needs. However, it should be noted that the preset direction and the preset distance need to be set to be able to receive a multiplexed parallel light signal containing at least two wavelengths processed by the collimator lens, and be able to shift the preset distance. A multiplexed parallel optical signal containing at least two wavelengths is transmitted to the incident end surface of the wavelength division multiplexing component.

It should also be noted that, in order to ensure that the optical module has better optical coupling tolerance, the coupling component provided in the embodiment of the present disclosure may be composed of two focusing lenses and one reflecting prism, that is, the coupling component Including: a first focusing lens, a reflecting prism, and a second focusing lens;

The first focusing lens and the second focusing lens both include a first surface and a second surface, the first surface and the second surface are opposite surfaces; the first surface is a flat surface, and the second surface is a convex surface.

The first focusing lens is used to focus the at least two single-wave parallel optical signals to the reflecting prism;

The positional relationship between the above-mentioned optical devices can be:

The collimating lens and the optical port that emits a combined optical signal containing at least two wavelengths are in a second relative position; wherein, the second relative position is the focal point of the collimating lens and the optical center of the optical port The location coincides with the location.

The specific structure of the above-mentioned optical module is described in detail below:

2 is a schematic diagram of a 3D structure of an optical module provided by an embodiment of the disclosure; as shown in FIG. 2, the collimating lens 104 is fixed in the light-passing hole of the optical carrying platform through a metal ring; the center and turning point of the collimating lens 104 The center of the reflective inclined surface of the prism 105 is aligned, and the center of the light exit surface of the turning prism 105 is aligned with the center of the incident end surface of the wave division multiplexing component 101. The first focusing lens 1021 corresponds to the exit end face of the wave division multiplexing component 101, and is used to decompose the wave division multiplexing component 101 to obtain four single-wave parallel light signals to focus on the reflection prism 1022; the reflection prism 1022 then focuses the four parallel light signals on the reflection prism 1022; The single-wave parallel light signal is reflected to the second focusing lens 1023, and then focused on the center of the photosensitive surface of the detector chip 103 through the second focusing lens 1023. The photosensitive surface of the detector chip 103 is a surface corresponding to the second surface of the second focusing lens 1023.

In FIG. 2, the first focusing lens 1021, the reflecting prism 1022, and the second focusing lens inside the dotted line constitute the coupling assembly 102. A multiplexed optical signal containing at least two wavelengths incident to the optical module may be sent from the optical port 106 as shown in FIG. 2; wherein, the optical port 106 may be fixed to each other with a metal ring through active coupling. In this way, a multiplexed optical signal containing at least two wavelengths emitted by the optical port 106 can be collimated by the collimator lens 104 to become a multiplexed parallel optical signal containing at least two wavelengths, and then transmitted to the turning prism 105 for processing. The translation of the optical path is transmitted to the wavelength division multiplexing component 101, and after being decomposed in the wavelength division multiplexing component 101, it becomes four single-wave parallel optical signals, and then four single-wave parallel optical signals are output to the first focusing lens 1021, After the focusing processing of the first focusing lens 1021, the reflection processing of the reflecting prism 1022, and the focusing processing of the second focusing lens 1023, it is finally focused on the photosensitive surface of the detector chip 103.

It should be noted that when the optical module does not include the turning prism 105, the optical port 106, the metal ring, and the collimating lens 104 can be moved to the preset direction by a preset distance, so that the optical signal from the optical port 106 can be aligned. The incident end face of the quasi-entry WDM component 101 is quasi-entered. As far as FIG. 2 is concerned, when the optical module does not include the turning prism 105, the optical port 106, the metal ring, and the collimating lens 104 need to be moved upward by a certain distance as a whole.

It should also be noted that, in order to achieve the coupling alignment of the optical path and improve the coupling tolerance, the first focusing lens 1021 needs to correspond to at least two single-wave parallel optical signals obtained after decomposition by the wavelength division multiplexing component 101, Realize the focusing processing of the at least two single-wave parallel light signals. In this way, the first focusing lens 1021 may be an array focusing lens or at least two single focusing lenses; when at least two single focusing lenses are selected, Each single focusing lens corresponds to a single-wave parallel light signal. Based on this, as shown in Fig. 2, when four single-wave parallel light signals are obtained after the decomposition of the wavelength division multiplexing component 101, the first focusing lens 1021 can be an array focusing lens or a combination of four single focusing lenses. When composed of 4 single focusing lenses, each single focusing lens corresponds to one single-wave parallel light signal among the four single-wave parallel light signals.

Correspondingly, since the second focusing lens 1023 needs to perform focusing processing on at least two single-wave parallel light signals reflected by the reflecting prism 1022, the second focusing lens 1023 may be an array focusing lens or at least two single focusing lenses Composition: When at least two single focusing lenses are selected, each single focusing lens corresponds to a single-wave parallel light signal. Based on this, as shown in FIG. 2, when four single-wave parallel light signals are obtained after the decomposition of the wavelength division multiplexing component 101, the second focusing lens 1023 can be an array focusing lens or a combination of four single focusing lenses. When composed of four single focusing lenses, each single focusing lens corresponds to one of the four single-wave parallel light signals reflected by the reflecting prism 1022.

In FIG. 2, since the reflective prism 1022 is located on the light path support, the position of the reflective prism 1022 is blocked by the light path support. Here, in order to better illustrate the position of the reflective prism 1022, an embodiment of the present disclosure provides a side view of a 3D structure of a coupling component in an optical module as shown in FIG. 3. In FIG. 3, the first focusing lens 1021, the reflective prism 1022 are all mounted on the plane of the light path support; among them, the reflecting prism 1022 is slanted and pasted on an inclined surface of the light path support. Here, when the reflecting prism 1022 is a 45° reflecting prism, the inclined surface used for pasting the 45° reflecting prism 1022 on the optical path support is also 45°. The second focusing lens 1023 is pasted on the spacer block, and the spacer block is placed on the PCBA; the detector chip 103 is also placed on the PCBA.

The second surface of each of the first focusing lenses 1021, that is, the center of the convex surface, is aligned with the center line of the inclined surface of the reflecting prism 1022. The center of the second surface of the second focusing lens 1023 is aligned with the center of the photosensitive surface of the detector chip 103.

It should be noted that the positional relationship of the optical components in the optical module is shown in Figure 2-3 above, but in order to better realize the coupling of the optical path and increase the optical coupling tolerance of the optical module, in practical applications, it is necessary to The relative position of each optical component in the optical module is limited to ensure that a large optical coupling tolerance can be achieved.

In the embodiments of the present disclosure, the relative positions of the optical components in the optical path mainly include: the relative positions of the optical components in the coupling assembly, and the relative positions between the collimating lens and the optical port that emits the optical signal.

As described above, in the embodiment of the present disclosure, the first focusing lens, the second focusing lens, and the reflecting prism are set to be in the first relative position, and the collimating lens is connected to the one that emits a multiplexed optical signal containing at least two wavelengths. The optical port is in the second relative position. The first relative position is a position where the image formed by the focal point of the first focusing lens through the reflecting prism coincides with the image formed by the detector chip through the second focusing lens. The second relative position is a position where the focal point of the collimating lens coincides with the position of the optical center of the light port.

Here, the first relative position and the second relative position are described:

Regarding the first relative position, that is, the relative distance between the first focusing lens 1021, the reflecting prism 1022, and the second focusing lens 1023 in the coupling assembly 102 can be set as follows: the focus of the first focusing lens 1021 is at the reflecting The image formed by the prism 1022 coincides with the image formed by the detector chip 103 in the second focusing lens 1023.

It should be noted that through the above-mentioned first relative position, the image formed by the focal point of the first focusing lens 1021 through the reflecting prism 1022 can be compared with the image formed by the first focusing lens 1021 and through the reflecting prism. The focal points of the optical paths of at least two single-wave parallel optical signals after the 1022 reflection processing coincide.

The first relative position will now be described with reference to specific drawings. FIG. 4 is a schematic diagram of the optical path of the coupling component in an optical module provided by an embodiment of the disclosure. As shown in FIG. 4, the black thin solid line represents the optical path, and the black solid line represents the optical path. The bold solid line represents the hard circuit board PCBA, and the black dashed line represents the schematic diagram of the focal point and the schematic diagram of the imaging of the first focusing lens 1021.

Fig. 4 shows a schematic diagram of the optical path of a single-wave parallel optical signal in the first condenser lens 1021, reflecting prism 1022, and second focusing lens 1023; here, the schematic diagram of the optical path is a side view; The optical signal to the first focusing lens 1021 is a single-wave parallel optical signal of at least two single-wave parallel optical signals obtained after decomposition by the above-mentioned wave-decomposition multiplexing component.

As shown in FIG. 4, the single-wave parallel light signal is incident on the first surface X of the first focusing lens 1021, and after passing through the first surface X, the signal passes through the second surface Y of the first focusing lens 1021. The focusing processing is transmitted to the transmitting prism 1022. After being reflected by the transmitting prism 1022, the single-wave parallel light signal of a certain path realizes the focusing of the optical path at the point C'in FIG. 4; after focusing, it is transmitted to the second focusing lens 1023. One surface X, after passing through the first surface X, undergoes focusing processing through the second surface Y of the second focusing lens 1023 and then is emitted to the center D of the photosensitive surface of the detector chip 103. The second focusing lens 1023 is pasted on the spacer Z.

As described above, the first surface X of the first focusing lens 1021 and the second focusing lens 1023 are all flat surfaces, and the second surface Y is all convex surfaces; the first surface X is the incident end surface, and the second surface Y is the focusing surface. End face.

In practical applications, the first focusing lens 1021 and the second focusing lens 1023 may be convex lenses; the convex lens is a lens with a thicker center and thinner edges, which can focus light. In this way, the first surface X of the convex lens is used to receive light and transmit light; the second surface Y of the convex lens is used to focus the light transmitted through the first surface X.

It should be noted that, in the embodiment of the present disclosure, the at least two single-wave parallel light signals enter from the first surface X of the first focusing lens 1021 and the second focusing lens 1023, and are incident on the first focusing lens 1021. , The second surface Y of the second focusing lens 1023 completes the focusing of the optical path through the second surface Y.

The photosensitive surface of the detector chip 103 can sense the light signal, so as to realize the reception of the light signal. After receiving the light signal, the detector chip 103 converts the received light signal into an electrical signal, which can realize other subsequent operations. deal with.

As shown in FIG. 4, the f ₁ is the focal point of the first focusing lens 1021, the dotted line AC represents the focal length of the first focusing lens, and the point A is the center of the second surface of the first focusing lens. The point C is the position of the focal point f _{1 of the first focusing lens 1021.} Point B is the intersection of the focal length AC and the reflective surface of the reflecting prism 1022, and point C'is the _{position of the image f 1} _{′ formed by the focal point f 1} of the first focusing lens 1021 through the reflecting prism 1022; wherein, the BC It is conjugated with BC' with respect to the reflecting prism 1022.

Preferably, the reflecting prism is a 45° reflecting prism.

As shown in FIG. 4, it should be noted that the point C'is also the focal point of the optical path of a single-wave parallel light signal after the focusing processing by the first focusing lens 1021 and the reflection processing by the reflecting prism 1022. . That is to say, the image f ₁ _{′ of the focal point f 1 of} the first focusing lens 1021 passing through the reflecting prism 1022 is parallel to at least two single-wave paths after focusing processing by the first focusing lens 1021 and reflecting processing by the reflecting prism 1022 The focal point C'of the light signal coincides.

Further, in FIG. 4, f ₂ is the focal point of the second focusing lens 1023, and the f ₂ is located below the point C'. The single-wave parallel light signal of a certain path is focused on the point C′ and then diverges and propagates downward, and is focused on the center D of the photosensitive surface of the detector chip 103 through the second focusing lens 1023. The image formed by the second focusing lens 1023 at the center point D of the photosensitive surface is also located at the point C′.

It should be noted that the focal point of the second focusing lens 1023 is located below the image formed by the reflecting prism 1022 by the focal point of the first focusing lens 1021.

In this way, through the combined action of the first focusing lens 1021, the reflecting prism 1022, and the second focusing lens 1023, the at least two single-wave parallel light signals can be accurately focused on the photosensitive surface of the detector chip 103, and the entire optical element depends on With this optical path structure, it has a large optical coupling tolerance.

Regarding the second relative position, that is, the relative position of the collimating lens and the optical port:

FIG. 5 is a schematic diagram of the optical path between the collimating lens and the optical port in an optical module provided by an embodiment of the disclosure. As shown in FIG. 5, 104 represents the collimator lens, 106 represents the optical port, and 2 solid black lines represent divergent light rays. Collimation is the process of parallel rays.

The collimating lens 104 is placed at a preset position; the preset position is a position where the focal point of the collimating lens 104 coincides with the position of the optical center of the light port 106. f is the focal point of the collimating lens 104, point V is the position of the focal point f of the collimating lens 104, and point V is also the position of the optical center of the optical port 106; the position of the optical center of the optical port 106 is The location of the center point of the mouth. For example, assuming that the optical port 106 is circular, the position of the optical center is the position of the dot.

Here, the optical signal emitted from the optical port 106 is divergent, and after passing through the collimating lens 104, the divergent optical signal becomes parallel collimated light and exits.

In this way, through the above-mentioned positional relationship, the combined optical signal containing at least two wavelengths from the optical port 106 can enter the collimating lens 104 without loss as much as possible, and the optical path is collimated by the collimating lens 104, so that the optical path containing at least two wavelengths can be collimated. One-way multiplexed parallel optical signals of three wavelengths. It provides a basis for the one-way multiplexed parallel optical signal containing at least two wavelengths to enter the wavelength division multiplexing component to realize the demultiplexing of the optical signal.

Here, the overall optical path of the above-mentioned optical module is described, and the overall optical path is represented by the positional relationship and corresponding optical path of the above-mentioned wavelength division multiplexing component, coupling component, collimator lens, optical port, detector chip and other optical devices:

FIG. 6 is a schematic diagram of the overall optical path of an optical module provided by an embodiment of the disclosure. As shown in FIG. 6, the components in the optical module include a wavelength division multiplexing component 601, a coupling component 602, a detector chip 603, and a collimating lens 604. ; Wherein, the coupling component 602 includes a first focusing lens, a reflecting prism, and a second focusing lens. In Figure 6, the optical port is represented by 605.

The collimating lens 604 is located between the optical port 605 and the wavelength division multiplexing component 601, and is used to receive a multiplexed optical signal containing at least two wavelengths emitted by the optical port, and combine the optical signal containing at least two wavelengths. A multiplexed optical signal is collimated into parallel light to obtain a multiplexed parallel optical signal containing at least two wavelengths, and the multiplexed parallel optical signal containing at least two wavelengths is transmitted to the incident of the wavelength division multiplexing component 601 End face.

The wavelength division multiplexing component 601 is located in the middle of the collimating lens 604 and the coupling component 602, and is incident on the incident end surface of the wavelength division multiplexing component 601, and a combined parallel optical signal containing at least two wavelengths passes through After the demultiplexing processing of the wavelength division multiplexing component 601, the emission end surface of the wavelength division multiplexing component 601 is emitted to the first surface of the first focusing lens of the coupling component 602.

It should be noted that, in this embodiment, the multiplexed parallel optical signal containing at least two wavelengths collimated by the collimating lens 604 is directly received by the wavelength division multiplexing component 601.

FIG. 7 is a schematic diagram of the overall optical path of another optical module provided by an embodiment of the disclosure; as shown in FIG. 7, the optical module includes: a wavelength division multiplexing component 701, a coupling component 702, a detector chip 703, and a collimating lens 704 and a turning prism 706; wherein, the coupling component 702 includes a first focusing lens, a reflecting prism, and a second focusing lens. In Figure 7, the optical port is represented by 705.

The turning prism 706 is located between the collimating lens 704 and the wave division multiplexing component 701, and is used to receive a multiplexed parallel light signal containing at least two wavelengths after collimation processing by the collimating lens 704, and The multiplexed parallel optical signal containing at least two wavelengths is translated by a preset distance in a preset direction, and is transmitted to the incident end surface of the wavelength division multiplexing component 701.

In the embodiment of the positional relationship shown in FIG. 7, the preset direction of the light path turning is upward, and the preset distance is the distance MN from the center of the collimating lens 704 to the upper surface of the wave division multiplexing component 701.

It should be noted that the one-way multiplexed parallel optical signal containing at least two wavelengths that enters the turning prism 706 is a parallel optical signal. Similarly, after being processed by the turning prism 706, it is emitted to the wave decomposition complex. The combined parallel optical signal of the component 701 containing at least two wavelengths is also a parallel optical signal.

At least two single-wave parallel optical signals emitted by the wavelength division multiplexing component 701 are respectively aligned with the centers of at least two convex mirrors of the first focusing lens; the center of the light exit surface of the turning prism 706 and the wavelength division multiplexer component 701 Align the center of the incident end face.

The wavelength division multiplexing component 701 is located in the middle of the turning prism 706 and the coupling component 702; it is used for receiving a combined parallel optical signal containing at least two wavelengths after translation processing of the turning prism 706.

It should also be noted that in the position relationship embodiment shown in FIG. 7, the setting of the turning prism 706 can make the optical module in the actual packaging process, if there is a change in other positions, the packaging can be made by changing the direction of the optical path. There are many possibilities for the location of each component in the.

In this way, through the cooperation of the above-mentioned components, the optical signal from the optical port can be well coupled to the detector chip.

It should be noted that after the optical path in the optical module is designed, a specific hardware packaging structure needs to be designed. FIG. 8 is a schematic diagram of a 3D structure application example of an optical module provided by an embodiment of the disclosure; as shown in FIG. 8, the detection The detector chip and the optical path support are placed on the PCBA801, and the detector chip and the PCBA801 are directly electrically connected. The optical path support 802 carries the first focusing lens and the reflecting prism. The wave division multiplexing component, the turning prism, the collimating lens and the optical port are all placed on the optical carrying platform 803. The optical path support 802 is placed on the PCBA801, and the PCBA801 is fixedly connected to the optical carrier platform 803; the wave-decomposition multiplexing component and the turning prism are aligned passively with the positioning boss on the optical carrier platform 803. The optical bearing platform 803 can be made of metal, such as tungsten copper, stainless steel, Kovar, and other materials.

FIG. 9 is a perspective view of the 3D structure of the coupling component in an optical module provided by an embodiment of the disclosure; as shown in FIG. 9, the reflecting prism and the first focusing lens are mounted on the optical path support, and the inclined surface of the reflecting prism is bonded to the optical path When the reflecting prism is 45° on an inclined surface of the bracket, the inclined surface for bonding the reflecting prism on the optical path bracket is also 45°. The detector chip is placed on the PCBA and is electrically connected to the PCBA; the spacer is placed on the PCBA, and the second focusing lens is mounted on the upper surface of the spacer.

FIG. 10 is a perspective view of a 3D structure of an optical module provided by an embodiment of the disclosure; FIG. 10 shows PCBA 108, spacer 107, metal ring 109, glass holder 110, optical port 106, turning prism 105, collimation The lens 104, the wave division multiplexing component 101, the first focusing lens 1021, the reflecting prism 1022, the detector chip 103, and the second focusing lens 1023. The collimating lens 104 is fixed in the light-passing hole of the optical carrying platform by a metal ring 109.

The second focusing lens 1023 includes at least two channels, and the at least two channels correspond to the at least two single-wave parallel optical signals. In other words, each channel in the second focusing lens 1023 is connected to one channel. The single-wave parallel light signal corresponds; the center of the second focusing lens 1023 is aligned with the center of the photosensitive surface of the detector chip 103 one by one.

In the embodiment of the present disclosure, the detector chip, the first focusing lens, and the second focusing lens may all be in the form of an array, that is, the detector chip is an array detector chip; the second focusing lens, the first focusing lens The focusing lens is an array focusing lens. Of course, the first focusing lens, the second focusing lens, and the detector chip can also be a single focusing lens or a single detector chip. When the first focusing lens, the second focusing lens, and the detector chip are in a single form, their number is the same as that of the detector chip. The number of single-wave optical signals obtained after decomposing the multiplexed optical signal is the same, that is, four single-wave optical signals are obtained after decomposing the multiplexing component. Then there are 4 first focusing lenses, 4 second focusing lenses, and 4 detector chips.

Here, the number of light paths emitted from the emission end face of the wave division multiplexing component is the same as the number of single focusing lenses included in the first focusing lens, wherein each single focusing lens can receive and emit one optical signal; That is, the number of channels of the first focusing lens is the same as the number of optical paths of the at least two single-wave parallel optical signals.

It should be noted that in the above-mentioned receiving optical path and optical module packaging method, most optical components adopt a passive mounting method, and only the receiving optical port and the optical path support are integrally coupled in an active manner; this makes the packaging process simple. Here, the active coupling between the receiving optical port and the optical path bracket is more conducive to monitoring the responsivity of the optical module.

In this way, an embodiment of the present disclosure provides an optical module that includes: an optical carrying platform, a collimating lens, a turning prism, a wave decomposition multiplexing component, a reflecting prism, a first focusing lens, an optical path support, and a second focusing Lens and detector chip. In this optical path structure, the collimating lens is used to collimate the optical signal emitted from the optical port into parallel light. After wavelength routing by the wavelength division multiplexing component, at least two optical signals pass through the first focusing lens and reflection The prism cooperates with the second focusing lens to achieve focusing and aiming of the collimated light onto the detector chip. Here, the optical coupling tolerance of the optical path structure of the optical module provided by the embodiments of the present disclosure is large, the packaging method is simple, and the reliability is high, and can achieve the purpose of industrial batch manufacturing.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the foregoing processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present invention. The implementation process constitutes any limitation. The sequence numbers of the foregoing embodiments of the present invention are only for description, and do not represent the superiority or inferiority of the embodiments.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

Claims

An optical module, the optical module includes: a wave division multiplexing component, a coupling component, and a detector chip; wherein,

The wavelength division multiplexing component is configured to decompose a received multiplexed parallel optical signal containing at least two wavelengths into at least two single-wavelength parallel optical signals;

The coupling component is configured to perform focus reflection processing on the at least two channels of single-wave parallel light signals, and focus the at least two channels of single-wave parallel light signals after the focus and reflection processing on the detector chip;

The detector chip is configured to receive the at least two channels of single-wave parallel optical signals, and convert the at least two channels of single-wave parallel optical signals into electrical signals.
The optical module according to claim 1, wherein:

The coupling component includes: a first focusing lens, a second focusing lens, and a reflecting prism;

The first focusing lens, the second focusing lens, and the reflecting prism are in a first relative position; wherein, the first relative position is the image formed by the focal point of the first focusing lens through the reflecting prism, and the The position where the image formed by the detector chip passing through the second focusing lens overlaps.
The optical module according to claim 2, wherein:

The first focusing lens is configured to focus the at least two single-wave parallel optical signals onto the reflecting prism;

The reflecting prism is configured to reflect the at least two single-wave parallel optical signals to the second focusing lens;

The second focusing lens is configured to focus the at least two single-wave parallel light signals onto the detector chip.
The optical module according to claim 2, wherein:

Each of the first focusing lens and the second focusing lens includes a first surface and a second surface. The first surface and the second surface are opposite surfaces; the first surface is a flat surface and the second surface is a convex surface.
The optical module according to claim 3, wherein:

The image formed by the focal point of the first focusing lens through the reflecting prism and the focusing point of the optical path of at least two single-wave parallel light signals after the focusing processing by the first focusing lens and the reflecting processing by the reflecting prism coincide.
The optical module according to claim 1, wherein the optical module further comprises: a collimating lens;

The collimating lens is configured to receive a multiplexed optical signal containing at least two wavelengths, and collimate the multiplexed optical signal containing at least two wavelengths into parallel light to obtain a multiplexed parallel containing at least two wavelengths An optical signal, transmitting the multiplexed parallel optical signal containing at least two wavelengths.
The optical module according to claim 6, wherein the collimating lens and the optical port that emits a combined optical signal containing at least two wavelengths are in a second relative position; wherein the second relative position is the collimator The position where the focal point of the straight lens coincides with the position of the optical center of the optical port.
The optical module according to claim 6, wherein the optical module further comprises: a turning prism;

The turning prism is configured to receive the multiplexed parallel optical signal containing at least two wavelengths after collimation processing by the collimator lens, and direct the multiplexed parallel optical signal containing at least two wavelengths to the pre- It is assumed that the direction is shifted by a preset distance and sent to the wave decomposition and multiplexing component.
3. The optical module according to claim 2, wherein the focal point of the second focusing lens is located below the image formed by the reflecting prism by the focal point of the first focusing lens.
3. The optical module according to claim 2, wherein the number of channels of the first focusing lens and the second focusing lens is the same as the number of optical paths of the at least two single-wave parallel optical signals.