CN110320612B

CN110320612B - Optical module and optical module assembly

Info

Publication number: CN110320612B
Application number: CN201810297389.9A
Authority: CN
Inventors: 王安斌
Original assignee: Alibaba Group Holding Ltd
Current assignee: Alibaba Group Holding Ltd
Priority date: 2018-03-30
Filing date: 2018-03-30
Publication date: 2023-06-30
Anticipated expiration: 2038-03-30
Also published as: CN110320612A

Abstract

The application discloses optical module and optical module assembly, each side optical module in optical module or the optical module assembly can include: at least one light emitter and at least one receiver arranged in sequence along a first direction; a first optical filter disposed in correspondence with the optical transmitter for: reflecting first emitted light of the corresponding light emitter, wherein the reflected light propagates along a first direction and along the optical fiber; and a second optical filter provided corresponding to the receiver for: reflecting a second emitted light propagating through the optical fiber in a direction opposite to the first direction, the reflected light reaching the corresponding receiver; wherein the first optical filter and the second optical filter have different transmission characteristics for light of different wavelengths. Therefore, the light emitted by the light emitters which are arranged along the first direction and positioned in the two side light modules can be coupled into the same optical fiber, so that the difficulty in arranging the internal structure of the optical module can be reduced, and the product integration level of the optical module is improved.

Description

Optical module and optical module assembly

Technical Field

The embodiment of the specification relates to the technical field of optical modules, in particular to an optical module and an optical module assembly.

Background

In the technical field of communication transmission, the optical module provides a feasible solution for remote communication transmission, is a key component meeting the performance requirement of the current network architecture, improves the flexibility of network coverage, and is easier to replace components under the condition of failure.

The optical module is an electronic component for photoelectric conversion, and the existing optical module comprises:

the optical transmitter, the optical fiber and the receiver are in one-to-one correspondence, the optical fiber is used as an optical channel of a beam of light, and the emitted light of the optical transmitter reaches the receiver through the optical fiber. Multiple sets of optical transmitters, optical fibers, and receivers may be integrated in an optical module, with the multiple optical transmitters being aligned with the multiple optical fibers, respectively.

However, it is desirable to provide an optical module with higher integration.

Disclosure of Invention

In view of this, the embodiments of the present disclosure provide an optical module and an optical module assembly with higher integration level.

The embodiment of the specification adopts the following technical scheme:

the embodiment of the present specification provides an optical module, including:

at least one light emitter and at least one receiver arranged in sequence along a first direction;

and a first optical filter, corresponding to the optical transmitter, for: reflecting first emitted light of the corresponding light emitter, wherein the reflected light propagates along the first direction and along the optical fiber;

and a second optical filter provided corresponding to the receiver for: reflecting a second emitted light propagating through the optical fiber in a direction opposite to the first direction, the reflected light reaching the corresponding receiver;

wherein the first optical filter and the second optical filter have different transmission characteristics for light of different wavelengths.

The embodiment of the specification also provides an optical module assembly, including: two side light modules arranged along a first direction;

each side of the light module comprises:

at least two groups of at least one light emitter and at least one receiver which are sequentially arranged along a first direction, wherein the light emitters and the receivers are arranged in an array;

and a first optical filter, corresponding to the optical transmitter, for: reflecting first emitted light of the corresponding light emitter, wherein the reflected light propagates along the first direction and propagates to another light module along the optical fiber;

and a second optical filter provided corresponding to the receiver for: reflecting a second emitted light propagating from another light module through the optical fiber in a direction opposite to the first direction, the reflected light reaching the corresponding receiver;

The embodiment of the specification also comprises an optical module assembly, which comprises: two side light modules arranged along a first direction;

each side of the light module comprises:

at least one group of at least one light emitter and at least one receiver arranged in sequence along a first direction;

The above-mentioned at least one technical scheme that this description embodiment adopted can reach following beneficial effect:

each side light module in the light module or light module assembly may comprise: at least one light emitter and at least one receiver arranged in sequence along a first direction; and a first optical filter, corresponding to the optical transmitter, for: reflecting first emitted light of the corresponding light emitter, wherein the reflected light propagates along the first direction and along the optical fiber; and a second optical filter provided corresponding to the receiver for: reflecting a second emitted light propagating through the optical fiber in a direction opposite to the first direction, the reflected light reaching the corresponding receiver; wherein the first optical filter and the second optical filter have different transmission characteristics for light of different wavelengths. Like this, in practical application, along the first direction arrange and lie in the light of a plurality of light emitters of both sides optical module in the emission light can be coupled to same optic fibre, and same optic fibre can be simultaneously as the optical path of the emission light of two at least light emitters, and then can reduce the optical module inner structure and arrange the degree of difficulty, promotes the product integrated level of optical module. At the same time, the number of optical fibers can be saved, and the production cost is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a top view of an optical module assembly according to a first embodiment of the present description;

FIG. 2 is a side view of the area A shown in FIG. 1;

FIG. 3 is a schematic diagram of a band distribution of each of the first optical filter and the second optical filter in the optical module assembly shown in FIG. 2;

fig. 4 is a schematic structural diagram of another optical module assembly according to the first embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another optical module assembly according to the first embodiment of the present disclosure;

fig. 6 is a top view of an optical module assembly provided in a second embodiment of the present disclosure;

fig. 7 is a side view of the area D shown in fig. 6.

Detailed Description

The analysis of the existing optical module finds that the optical fibers have one-to-one correspondence with the light emitters and the receivers with the emitting-receiving relationship, and an optical fiber is arranged between each pair of light emitters and each pair of light receivers to serve as an optical channel. In this case, when more groups of light emitters and receivers need to be arranged in the optical module, the number of required optical fibers also increases, the difficulty in arranging the internal structure of the optical module increases, and the integration level is low.

To this end, the present description embodiments provide an improved optical module and optical module assembly. The optical module can be a small pluggable SFP (full name: small Form Pluggable) module, a four-channel small pluggable QSFP (full name: quad Small Form Pluggable) module or other multi-channel optical modules or the design of an active optical cable AOC (full name: active Optical Cables) adopting the multi-channel optical modules. Specifically, the optical module described in the embodiments of the present specification can be used for SFP DD (50 g,100 g), QSFP (100 g,200 g), QSFP DD (200 g,400 g), CXP, and the like.

The light emitters in the optical module may be selected from lasers, such as vertical cavity surface emitting lasers VCSELs (full: vertical Cavity Surface Emitting Laser), and the receivers in the optical module may be selected from photodiodes PD (full: photodiode). This converts the electrical signal to an optical signal using a VCSEL and reconverts the optical signal to an electrical signal using a PD. The optical module may be provided with an electrical signal receiving port connected to the VCSEL and an electrical signal output port connected to the PD, which will not be described in detail herein. Besides the photoelectric conversion function, the optical module integrates a plurality of signal processing functions, such as: the functions of the multiplexer MUX (collectively: multiplexer)/demultiplexer DEMUX, CDR, function control, energy harvesting and monitoring, etc., are not described in detail herein.

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present specification. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present application based on the embodiments herein.

The following describes in detail the technical solutions provided by the embodiments of the present specification with reference to the accompanying drawings.

First embodiment

Fig. 1 is a schematic structural diagram of an optical module assembly according to an embodiment of the present disclosure, and fig. 2 is a front view of a region a in fig. 1, where the structure is as follows.

The optical module assembly may include: the two side light modules B, C disposed along the first direction HH'. In a specific application, the optical module B may be a switch optical module or others, and the optical module C may be a server optical module or others, which is not specifically limited herein. The two optical modules B are connected by using the optical fiber 100.

Taking optical module B as an example, optical module B may include:

the

light emitters

11a, 12a and the

receivers

13b, 14b arranged in this order along the first direction;

first

optical filters

21a, 22a provided corresponding to the

optical transmitters

11a, 12a, respectively, are configured to: reflecting the first emitted light of the respective corresponding light emitters, the reflected light L1, L2 propagating along the first direction HH '(as arrow H') and along the optical fiber 100;

second

optical filters

23b, 24b provided corresponding to the

receivers

13b, 14b, respectively, for: reflecting the second emitted light L3, L4 propagating through the optical fiber 100 in the opposite direction to the first direction (as indicated by arrow H), the reflected light reaching the corresponding

receiver

13b, 14b;

taking the optical module C as an example, the optical module C may include:

the

light emitters

13a, 14a and the

receivers

11b, 12b arranged in this order along the first direction;

first

optical filters

23a, 24a provided corresponding to the

optical transmitters

13a, 14a, respectively, for: reflecting the first emitted light of the respective corresponding light emitters, the reflected light L3, L4 propagating along the first direction HH' (as arrow H) and along the optical fiber 100;

second optical filters 21b, 22b provided corresponding to the

receivers

11b, 12b, respectively, for: reflecting the second emitted light L1, L2 propagating through the optical fiber 100 in the opposite direction to the first direction (as indicated by arrow H'), the reflected light reaching the corresponding

receiver

11b, 12b;

the first

optical filters

21a, 22a, 23a and the second

optical filters

21b, 22b, 23b, 24b have different transmission characteristics for light of different wavelengths.

The "first" of the first optical filter and the "second" of the second optical filter are used to distinguish optical filters corresponding to different optical elements at different positions, and do not constitute limitation of the optical filter properties.

In practical application, a transmitting-receiving relationship is formed between the light emitter of the optical module B and the corresponding receiver of the optical module C, and a transmitting-receiving relationship is formed between the receiver of the optical module B and the corresponding light emitter of the optical module C. Specifically, the transmission-reception relationship is formed between the light emitter 11a and the receiver 11b, between the light emitter 12a and the receiver 12b, between the light emitter 13a and the receiver 13b, and between the light emitter 14a and the receiver 14b, respectively.

In this case, the operating principle of the optical module assembly may be:

the first optical filter 21a corresponding to the optical transmitter 11a reflects the light emitted by the optical transmitter 11a for the first time, so as to obtain reflected light L1 parallel to the first direction HH ', and propagates along the arrow H' toward the optical fiber 100, and during the propagation, transmits from the other optical filter between the first optical filter 21a and the second optical filter 21b, passes through the corresponding optical fiber 100, and reaches the second optical filter 21b corresponding to the receiver 11 b;

the second optical filter 21b corresponding to the receiver 11b reflects the reflected light L1 reflected for the first time, and the reflected light reaches the corresponding receiver 11b.

The first optical filter 22a corresponding to the optical transmitter 12a reflects the light emitted by the optical transmitter 12a for the first time, so as to obtain reflected light L2 parallel to the first direction HH ', and propagates along the arrow H' toward the optical fiber 100, and during the propagation, transmits from the other optical filter between the first optical filter 22a and the second optical filter 22b, passes through the corresponding optical fiber 100, and reaches the second optical filter 22b corresponding to the receiver 12b;

the second optical filter 22b corresponding to the receiver 12b reflects the reflected light L2 reflected for the second time, and the reflected light reaches the corresponding receiver 12b.

The first optical filter 23a corresponding to the optical transmitter 13a reflects the light emitted by the optical transmitter 13a for the first time, so as to obtain reflected light L3 parallel to the first direction HH', and propagates along the arrow H toward the optical fiber 100, and during the propagation, transmits from the other optical filter between the first optical filter 23a and the second optical filter 23b, passes through the corresponding optical fiber 100, and reaches the second optical filter 23b corresponding to the receiver 13 b;

the second optical filter 23b corresponding to the receiver 13b reflects the reflected light L3 reflected for the first time, and the reflected light reaches the corresponding receiver 13b.

The first optical filter 24a corresponding to the optical transmitter 14a reflects the light emitted by the optical transmitter 14a for the first time, so as to obtain reflected light L4 parallel to the first direction HH', and propagates along the arrow H toward the optical fiber 100, and during the propagation, transmits from the other optical filter between the first optical filter 24a and the second optical filter 24b, passes through the corresponding optical fiber 100, and reaches the second optical filter 24b corresponding to the receiver 14b;

the second optical filter 24b corresponding to the receiver 14b reflects the reflected light L4 reflected for the second time, and the reflected light reaches the corresponding receiver 14b.

Thus, according to the first optical filter and the second optical filter having different transmission characteristics for light of different wavelengths, two optical filters corresponding to each pair of the optical transmitters and the receivers based on the transmission-reception relationship may be reflective for the corresponding transmission light and transmissive for the other respective reflection lights, so that the transmission lights corresponding to at least two pairs of the optical transmitters and the receivers having the transmission-reception relationship may be coupled into the same optical fiber.

Referring to fig. 2, the light emitters 11a and the light receivers 11b forming the transmitting-receiving relationship are respectively located at the left and right sides of the optical fiber 100, and the other light emitters and the other light receivers forming the transmitting-receiving relationship are also respectively located at the left and right sides of the optical fiber 100, which can be referred to. The reflected light L1, L2, L3, L4 of the light emitted from each

light emitter

11a, 12a, 13a, 14a after the light is reflected for the first time by the corresponding light filter is parallel to the first direction HH' and passes through the same optical fiber 100 to reach the

corresponding receiver

11b, 12b, 13b, 14b. Therefore, by utilizing the optical module and the optical module assembly described in the embodiments of the present application, the same optical fiber can be used as the optical channels of the pairs of light emitters and the receivers, so that the difficulty in arranging the internal structure of the optical module is reduced, and the product integration level of the optical module is improved. At the same time, the number of optical fibers can be saved, and the production cost is reduced.

In addition, as shown in fig. 2, in the optical module B, two

optical transmitters

11a, 12a and receivers 13B, 14B are included. The light module C is correspondingly arranged. In an embodiment of the present application, at least one light emitter and at least one receiver may be sequentially arranged along the first direction in each side light module, so as to be used with another light module arranged based on the emission-receiving relationship.

Thus, referring to the examples shown in fig. 1 and 2, each side light module may include:

In this embodiment of the present disclosure, each of the first optical filter and the second optical filter may select an optical bandpass filter, where the optical bandpass filter allows light in a selected wavelength band to pass, and light in a wavelength band outside the passband is cut off, where the passing is to allow light transmission, and the cut off is to allow light reflection, so that the first optical filter and the second optical filter have different transmission characteristics for light of different wavelengths. At this time, the wavelength of the optical filter may refer to the center wavelength of the optical band-pass filter.

In this case, referring to fig. 3 in combination, fig. 3 is a schematic diagram showing the band distribution of each optical filter in the optical module according to the embodiment of the present specification.

Referring to fig. 2 and 3 (a), on the left side of the optical fiber 100, the first optical filter 21a reflects the light emitted by the optical transmitter 11a for the first time to obtain reflected light L1, where the reflected light L1 is parallel to the first direction HH', and the lower limit λa of the selected wavelength bands λa to λb of the first optical filter 21a may be greater than the wavelength λ1 of the reflected light of the optical transmitter 11 a;

the first optical filter 22a reflects the light emitted from the light emitter 12a for the first time to obtain reflected light L2 parallel to the first direction HH', so that a lower limit λc of the selected wavelength bands λc to λd of the first optical filter 22a can be larger than the light wavelength λ2 emitted from the light emitter 12a, and at the same time, the first optical filter 22a transmits the reflected light L1 corresponding to the light emitter 11a, so that the light wavelength λ1 emitted from the light emitter 11a is also located between λc to λd;

the second optical filter 23b reflects the reflected light L3 corresponding to the light emitter 13a, so that the lower limit λe of the selected wavelength bands λe to λf of the second optical filter 23b can be larger than the emitted light wavelength λ3 of the light emitter 13a, and simultaneously, the second optical filter 23b transmits the reflected light L1 and L2 corresponding to the

light emitters

11a and 12a, so that the emitted light wavelength λ1 of the light emitter 11a and the emitted light wavelength λ2 of the light emitter 12a are also located between λe to λf;

the second optical filter 24b reflects the reflected light L4 corresponding to the light emitter 14a, such that the lower limit λg of the selected wavelength bands λg to λh of the second optical filter 24b may be larger than the emitted light wavelength λ4 of the light emitter 14a, and simultaneously, the second optical filter 24b transmits the reflected light L1, L2, L3 corresponding to the

light emitters

11a, 12a, 13a, such that the emitted light wavelength λ1 of the light emitter 11a, the emitted light wavelength λ2 of the light emitter 12a, and the emitted light wavelength λ3 of the light emitter 13a are all located between λg to λh.

Correspondingly, referring to fig. 2 and 3 (b), on the right side of the optical fiber 100, the second optical filter 21b reflects the reflected light L1 corresponding to the optical transmitter 11a for the second time, so that the upper limit λb ' of the selected wavelength band λa ' to λb ' of the second optical filter 21b may be smaller than λ1, while the second optical filter 21b transmits the reflected light L2, L3, L4 corresponding to the

optical transmitters

12a, 13a, 14a, so that λ2, λ3, λ4 are all located within λa ' to λb ';

the second optical filter 22b reflects the light emitted by the light emitter 12a for the first time to obtain reflected light L2 parallel to the first direction HH ', so that an upper limit λd' of a selected wavelength band λc 'to λd' of the second optical filter 22b can be smaller than λ2, and the second optical filter 22b transmits the reflected light L3, L4 corresponding to the

light emitters

13a, 14a, so that both λ3, λ4 are located in λc 'to λd';

the first optical filter 23a reflects the light emitted from the light emitter 13a for the first time, the upper limit λf ' of the selected wavelength band λe ' to λf ' of the first optical filter 23a may be smaller than λ3, and the first optical filter 23a transmits the reflected light L4 corresponding to the light emitter 14a such that λ4 is located within λe ' to λf ';

the first optical filter 24a first reflects the light emitted by the light emitter 14a such that an upper limit λg ' of the selected wavelength bands λg ' to λh ' of the first optical filter 24a may be less than λ4.

The working principle of the optical module assembly described in the embodiment of the application is as shown in the above, and the wavelengths of the first optical filter and the second optical filter can be reasonably selected according to different wavelengths of emitted light of each light emitter. By reasonably selecting the relation between the wavelength of each light emitter and the wavelength of the first optical filter and the wavelength of the second optical filter, the emitted light corresponding to a plurality of pairs of light emitters and receivers can be coupled into one optical fiber, and the same optical fiber can be used as channels of the emitted light corresponding to four pairs or at least two pairs of light emitters and receivers.

It should be understood that the emitted light between the light emitter and the receiver having the emission-receiving relationship in fig. 2 is represented by using different forms of lines, such as solid lines, dashed lines, and does not represent actual light rays. In addition, the reflected lights parallel to the first direction HH 'that reflect the respective emitted lights for the first time may be separated from each other, which is only required for descriptive effect, and in practical applications, the reflected lights parallel to the first direction HH' may be coupled into one beam or separated from each other by some other distance, which is not particularly limited herein.

Based on the above analysis, in the same direction (as arrow H ') of the first direction HH', the light emitters and/or receivers located at the left side light module B and the light emitters and/or receivers located at the other side light module C are in a positional correspondence according to a one-to-one correspondence of the emission-reception relationships. Specifically, in the direction H', the

light emitters

11a, 12a and the receivers 13B, 14B in the light module B are arranged in order, and correspondingly, the receivers 11B, 12B and the

light emitters

13a, 14a in the light module C are arranged in order according to a one-to-one transmission-reception relationship. In this case, the optical path length of the emitted light of each light emitter is the same, facilitating the layout of the respective optical components.

In addition, in the optical module B located on the left side along the same direction H 'of the first direction HH', the wavelengths of the first

optical filters

21a, 22a and the second optical filters 23B, 24B may be sequentially reduced; in the optical module C located on the right side, the wavelengths of the respective second optical filters 21b, 22b and the

first filters

23a and 24a are sequentially increased.

In this way, in the same direction as the first direction, when the wavelengths of the first optical filter and the second optical filter located in one of the side optical modules are sequentially increased, the wavelengths of the first optical filter and the second optical filter located in the other side optical module are sequentially decreased.

In addition, referring to fig. 2, the optical module assembly may further include:

and an auxiliary optical filter positioned on the optical path between the receiver and the corresponding second optical filter for filtering the variegated color. For example, an auxiliary optical filter 33b is provided on the optical path between the receiver 13b and the corresponding second optical filter 23b, an auxiliary optical filter 34b is provided on the optical path between the receiver 14b and the corresponding second optical filter 24b, an auxiliary optical filter 31b is provided on the optical path between the receiver 11b and the corresponding second optical filter 21b, and an auxiliary optical filter 32b is provided on the optical path between the receiver 12b and the corresponding second optical filter 22 b.

Each auxiliary filter can be used for eliminating variegated colors except corresponding light rays and reducing optical crosstalk. For example, the auxiliary filter 33b may be used to eliminate other light than the light emitted by the light emitter 13a, and reference is made to other auxiliary filters, which are not described in detail herein.

In the embodiment of the present application, as shown in fig. 2, each side light module B, C includes both a light emitter and a receiver sequentially arranged along the first direction. In this way, the same side of each optical fiber 100 may be provided (simultaneously) with at least one optical transmitter and receiver, and the sensitivity of the optical transmitter (e.g., VCSEL) to position and angle may be reduced with a receiver (e.g., PD) having a larger optical space, which may account for larger coupling tolerances due to optical transmitter concentration. For example, as shown in fig. 2, the left or right side of the optical fiber 100 only needs to consider the coupling between the emitted light of two light emitters, rather than the coupling between four light emitters.

Preferably, in the optical module B, the

light emitters

11a, 12a are arranged in sequence along the first direction HH ' to form one group, and the receivers 13B, 14B are arranged in sequence along the first direction HH ' to form another group, the two groups being arranged along the first direction HH '. In the optical module C, the

light emitters

13a, 14a are arranged in sequence along the first direction HH ' to form one group, and the

receivers

11b, 12b are arranged in sequence along the first direction HH ' to form another group, the two groups being arranged along the first direction HH '. Thus, in each side light module, the at least one light emitter and the at least one receiver sequentially arranged along the first direction are arranged in the following manner: the light emitters and the receivers are each arranged in sequence along the first direction to form two groups arranged in sequence along the first direction.

Fig. 4 is a schematic structural view of another optical module assembly according to the embodiment of the present disclosure, and the structure is as follows. Wherein in the light module B ', the light emitters 11a', 12a 'and the receivers 13B', 14B 'are alternately arranged along the first direction HH'; in the light module C ', the light emitters 13a', 14a 'and the receivers 11b', 12b 'are alternately arranged along the first direction HH'. Thus, in each side light module, the at least one light emitter and at least one receiver sequentially arranged along the first direction may be arranged in the following manner: and the first direction is sequentially and alternately arranged along the first direction. The principle of operation in the light module assembly may refer to the paths of the emitted light identified by the arrows.

Fig. 5 is a schematic structural view of another optical module assembly according to the embodiment of the present disclosure, and the structure is as follows. Wherein in the light module B ', the light emitters 11a ", 12a" are closer to the other side light module C than the receivers 13B ", 14B", and in the light module C ', the light emitters 13a ", 14a" are closer to the other side light module B ' than the receivers 11B ", 12B", based on a one-to-one transmission-reception relationship. The principle of operation in the light module assembly may refer to the paths of the emitted light identified by the arrows.

Therefore, in the embodiment of the present application, in each side light module, the number and the arrangement order of the at least one light emitter and the at least one receiver sequentially arranged along the first direction may be adjusted according to the specific application.

As shown in fig. 1, in the optical module assembly according to the embodiment of the present application, each side light module may include 3 groups of at least one light emitter and at least one receiver sequentially arranged along the first direction, and may further include other numbers of at least one group of at least one light emitter and at least one receiver sequentially arranged along the first direction. Each group of at least one light emitter and at least one receiver arranged in sequence along the first direction are arranged in parallel along the second direction LL ', and each optical fiber may be arranged in parallel along the second direction LL'.

By utilizing the optical module and the optical module assembly described in the embodiments of the present disclosure, the transmitting light of at least two optical transmitters can be coupled to the same optical fiber, and each optical fiber can be used as an optical channel between at least two pairs of optical transmitters and receivers having a transmitting-receiving relationship in two-side optical modules, so as to reduce the difficulty of arranging the internal structure of the optical module, and improve the product integration level of the optical module. Meanwhile, in practical application, the number of optical fibers can be saved, and the production cost is reduced.

Second embodiment

Fig. 6 is a top view of an optical module assembly according to a second embodiment of the present disclosure, and the structure is as follows.

In the light module assembly, each side light module may include eight groups of at least one light emitter and at least one receiver sequentially arranged along the first direction. Accordingly, in practical applications, the optical module assembly may include eight optical fibers 500.

Wherein the light emitters 51 and the receivers 52 in each side light module are arranged in an array.

The array is thus arranged such that each light emitter 51 and receiver 52 forms a respective node in the array. The array arrangement mode can improve the arrangement precision of chips corresponding to the light emitters 51 and the receivers 52 on the PCB 50, for example, when the chips are stuck on the PCB 50, the array arrangement mode can reduce the difficulty of position calibration between the light emitters and the receivers, improve the arrangement precision and improve the rigid yield of products.

Further, in each side light module, the light emitters 51 sequentially arranged along the second direction LL' are located on the same chip; the receivers 52 arranged in sequence along the second direction LL' are located on the same chip. Wherein the second direction LL 'is perpendicular to the first direction HH'.

Thus, on the same chip, one row parallel to the second direction LL' may be provided with light emitters 51, which may be fabricated in an array manner in the same manufacturing process; another row parallel to the second direction LL' may be provided with receivers 52 each, which may be fabricated in an array in the same manufacturing process. This makes the positions and the order of the light emitters 51 and the receivers 52 on the same chip more desirable and the arrangement accuracy higher. In addition, in this case, it is not necessary to individually attach each chip to the PCB 50, and the man-hour cost is reduced.

The working principle and other structures of the optical module and the optical module assembly described in the present specification may refer to the content of the first embodiment, and are not described herein again.

As shown in fig. 6, each side light module may include eight groups of at least one light emitter and at least one receiver arranged in sequence along the first direction. In other embodiments of the present application, each side light module may include at least two groups of at least one light emitter and at least one receiver sequentially arranged along the first direction, and the light emitters and the receivers are arranged in an array. The working principle of each group of at least one light emitter and at least one receiver and the corresponding first optical filter and second optical filter, which are arranged in sequence along the first direction, may be referred to the content of the first embodiment, and will not be described in detail here.

As shown in fig. 7, each side light module may include one light emitter and one receiver arranged in sequence along the first direction, which is only an example. In combination with the content of the first embodiment, each side light module may include at least one light emitter and at least one receiver arranged in sequence along the first direction.

In practical applications, as shown in fig. 7, each two pairs of optical transmitters and receivers having a transmitting-receiving relationship may share one optical fiber 500, and each optical fiber 500 may serve as an optical channel for the corresponding emitted light of the two pairs of optical transmitters and receivers. Therefore, the original connection of sixteen optical fibers is changed into the connection of eight optical fibers, the number of the optical fibers is saved, and the cost is further reduced. As an improvement, it may be that at least two pairs of optical transmitters and receivers having a transmission-reception relationship share one optical fiber.

In the embodiment of the present disclosure, the optical module and the optical module assembly described in the embodiment of the present disclosure can reduce the number of optical fibers used, for example, from originally requiring eight optical fibers to requiring only four optical fibers, from four optical fibers to requiring only two optical fibers.

Meanwhile, referring to fig. 7, the optical module described in the embodiment of the present disclosure adopts a very compact dual-wavelength optical path, so that a multi-channel optical module and an active optical cable AOC adopting the multi-channel optical module can be realized.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The foregoing is merely exemplary of the present disclosure and is not intended to limit the present disclosure. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. An optical module, comprising:

wherein the first optical filter and the second optical filter have different transmission characteristics for light of different wavelengths;

the optical module includes: at least two groups of at least one light emitter and at least one receiver which are sequentially arranged along a first direction, wherein the light emitters and the receivers in the optical module are arranged in an array, so that the emitting light corresponding to the at least two groups of light emitters and the receivers with an emitting-receiving relationship is coupled into the same optical fiber; wherein at least two emitted lights of the same side of the optical module are coupled into the same optical fiber;

the light emitters which are sequentially arranged along the second direction are manufactured in an array mode in the same manufacturing process so as to be positioned on the same chip; and/or the number of the groups of groups,

the receivers which are sequentially arranged along the second direction are manufactured in an array mode in the same manufacturing process so as to be positioned on the same chip, wherein the second direction is perpendicular to the first direction;

in the same direction along the first direction, the light emitter and the receiver positioned at one side light module and the light emitter and the receiver positioned at the other side light module are in position correspondence according to a one-to-one corresponding emission-receiving relation; the optical path length of the emitted light of each light emitter is the same;

when the wavelengths of the first optical filter and the second optical filter positioned on one side optical module are sequentially increased along the same direction of the first direction, the wavelengths of the first optical filter and the second optical filter positioned on the other side optical module are sequentially decreased;

the wavelengths of the first optical filter and the second optical filter are selected according to the different wavelengths of the emitted light of the light emitters.

2. An optical module assembly, comprising: two side light modules arranged along a first direction;

each side of the light module comprises:

in the optical module at each side, the light emitters which are sequentially arranged along the second direction are manufactured in an array mode in the same manufacturing process so as to be positioned on the same chip; and/or the number of the groups of groups,

the receivers which are sequentially arranged along the second direction are manufactured in an array mode in the same manufacturing process so as to be positioned on the same chip, wherein the second direction is perpendicular to the first direction, so that at least two groups of light emitters with emission-receiving relations and emission lights corresponding to the receivers are coupled into the same optical fiber, and at least two emission lights on the same side of the optical module are coupled into the same optical fiber;

3. The optical module assembly of claim 2, wherein: and in the same direction along the first direction, the light emitter or the light receiver positioned on one side light module and the light emitter or the light receiver positioned on the other side light module are in position correspondence according to a one-to-one corresponding emission-receiving relation.

4. The light module assembly of claim 2, the light module further comprising on each side:

and an auxiliary optical filter positioned on the optical path between the receiver and the second optical filter for filtering the variegated color.

5. The light module assembly of claim 2, wherein in each side light module, the at least one light emitter and the at least one receiver sequentially arranged along the first direction are arranged in a manner that:

sequentially and alternately arranged along the first direction; or alternatively

The light emitters and the receivers are each arranged in sequence along the first direction to form two groups arranged in sequence along the first direction.

6. The optical module assembly of claim 2, the first and second optical filters being optical bandpass filters.