Optical coupling assembly based on hybrid integrated FA array

Abstract

The utility model relates to the technical field of optical communication, in particular to an optical coupling assembly based on a hybrid integrated FA array, which comprises a laser assembly, an optical signal preprocessing assembly, an integrated optical fiber array assembly, a plurality of photoelectric detectors and a base, the laser assembly, the optical signal preprocessing assembly and the integrated optical fiber array assembly are sequentially coupled and arranged along an optical path, and the laser assembly, the optical signal preprocessing assembly, the integrated optical fiber array assembly and the photoelectric detector are arranged on the base; the integrated optical fiber array assembly comprises a first optical fiber array and a second optical fiber array, the first optical fiber array and the second optical fiber array are vertically overlapped or horizontally arranged in parallel, and the photoelectric detector is arranged below the second optical fiber array. The first optical fiber array and the second optical fiber array are vertically overlapped or horizontally arranged in parallel to form the integrated optical fiber array assembly, so that the structure is more compact, and the occupied volume of the first optical fiber array and the second optical fiber array in a limited space is reduced.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, and in particular to an optical coupling component based on a hybrid integrated FA array. Background Technology

[0002] In the 400G DR (Datacenter Reach) 4 and 800G DR8 series products widely used in existing data centers, both the Transmitter Optical Sub-Assembly (TOSA) and Receiver Optical Sub-Assembly (ROSA) products employ a discrete fiber array design. The optical signal emitted by the laser assembly is first focused by a lens, then guided by an isolator, and finally enters the fiber array at the input end of the TOSA. The ROSA's coupling end uses the fiber array to receive the optical signal, which is reflected at a 42.5° angle at the bevel at the fiber end and enters a photodetector for conversion. In traditional single-mode DR series optical devices used in data centers, the TOSA and ROSA fiber arrays are discrete and independent of each other.

[0003] However, as data center product speeds continue to increase, the number of required components is also increasing, making product miniaturization and integration an urgent need. The discrete fiber array designs used in traditional TOSA and ROSA are not conducive to meeting the needs of product miniaturization because they are independent and occupy a large space.

[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0005] The technical problem this invention aims to solve is that the discrete fiber array design used in traditional TOSA and ROSA occupies a large space, which is not conducive to meeting the needs of product miniaturization.

[0006] The present invention adopts the following technical solution:

[0007] On one hand, this utility model provides an optical coupling component based on a hybrid integrated FA array, comprising a laser component 1, an optical signal preprocessing component 2, an integrated fiber array component 3, multiple photodetectors 4, and a base 5; the laser component 1, the optical signal preprocessing component 2, and the integrated fiber array component 3 are sequentially coupled along the optical path, and the laser component 1, the optical signal preprocessing component 2, the integrated fiber array component 3, and the photodetectors 4 are disposed on the base 5;

[0008] The integrated fiber array assembly 3 includes a first fiber array 300 and a second fiber array 310. The first fiber array 300 and the second fiber array 310 are stacked vertically or placed horizontally side by side. The photodetector 4 is disposed below the second fiber array 310.

[0009] The first fiber array 300 is used to transmit the optical signal emitted by the laser assembly 1 to the other end; the second fiber array 310 is used to receive the optical signal from the other end.

[0010] Preferably, the integrated fiber array assembly 3 includes a first fixing block 301 and a second fixing block 311, the first fiber array 300 is fixedly disposed between the first fixing block 301 and the second fixing block 311, and the second fiber array 310 is fixedly disposed between the base 5 and the second fixing block 311.

[0011] Preferably, the light output port of the second fiber array 310 is provided with a first reflective surface 3100, and the end face of the second fixing block 311 is provided with a second reflective surface 3110. The second reflective surface 3110 is disposed close to the optical signal preprocessing component 2. The first reflective surface 3100 is used to reflect the optical signal transmitted from the second fiber array 310 into the photodetector 4, and the second reflective surface 3110 is used to reflect the optical signal emitted by the laser component 1 into the first fiber array 300.

[0012] Preferably, the receiving end of the first fiber array 300 is provided with a third reflective surface 3000. The optical signal emitted by the laser component 1 is reflected by the second reflective surface 3110 to the third reflective surface 3000, and the third reflective surface 3000 reflects the optical signal into the first fiber array 300.

[0013] Preferably, the end of the third reflective surface 3000 extends beyond the top of the second fixing block 311 by a predetermined distance to receive the light signal reflected by the second reflective surface 3110.

[0014] Preferably, the integrated fiber array assembly 3 includes a first fixing block 301 and a second fixing block 311, with the first fiber array 300 and the second fiber array 310 located between the first fixing block 301 and the second fixing block 311.

[0015] Preferably, the base 5 is provided with a boss 50, the boss 50 is provided corresponding to the second fiber array 310, and the photodetector 4 is provided on the boss 50.

[0016] Preferably, the optical signal emitted by the laser component 1 is directly transmitted to the first fiber array 300 after passing through the optical signal preprocessing component 2.

[0017] Preferably, the optical signal preprocessing component 2 includes a converging lens 20, an optical isolator 21, and a transimpedance amplifier 22; the optical isolator 21 is fixedly mounted on a bracket 23, the transimpedance amplifier 22 is mounted below the bracket 23, and the laser component 1, the converging lens 20, the optical isolator 21, and the integrated fiber array component 3 are arranged sequentially.

[0018] Preferably, the optical signal preprocessing component 2 includes a converging lens 20, an optical isolator 21, and a collimating lens 24; the laser component 1, the collimating lens 24, the optical isolator 21, the converging lens 20, and the integrated fiber array component 3 are arranged sequentially.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: by placing the first fiber array 300 and the second fiber array 310 overlapping vertically or horizontally side by side to form an integrated fiber array assembly 3, the structure is more compact than the separate design of the existing TOSA and ROSA, reducing the volume occupied by the first fiber array 300 and the second fiber array 310 in a limited space. At the same time, when assembling the first fiber array 300 and the second fiber array 310 to form the integrated fiber array assembly 3, a partial optical path for the optical signal to enter the first fiber array 300 and a optical path for the return optical signal to exit from the second fiber array 310 are preset. When installing the integrated fiber array assembly 3 in the optical coupling assembly, it is only necessary to align the transmitting end in the second fiber array 310 with the photodetector 4, making the installation convenient and simple. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an optical coupling component based on a hybrid integrated FA array provided in an embodiment of the present invention;

[0022] Figure 2a This invention provides an optical coupling component based on a hybrid integrated FA array. Figure 1 Front view of the structure;

[0023] Figure 2bThis invention provides an optical coupling component based on a hybrid integrated FA array. Figure 2a A schematic diagram of the optical path of the structure;

[0024] Figure 2c This is a schematic diagram of a laser component based on a hybrid integrated FA array optical coupling component, where the optical signal directly enters the first fiber array, according to an embodiment of the present invention.

[0025] Figure 2d This utility model provides an embodiment of a hybrid integrated FA array. Figure 2c A three-dimensional schematic diagram;

[0026] Figure 3a This is a schematic diagram of a second structure of an optical coupling component based on a hybrid integrated FA array provided in an embodiment of the present invention;

[0027] Figure 3b This invention provides an optical coupling component based on a hybrid integrated FA array. Figure 3a Schematic diagram of the optical path;

[0028] Figure 3c This invention provides an optical coupling component based on a hybrid integrated FA array. Figure 3a A schematic diagram showing the return optical signal entering the photodetector.

[0029] The attached figures are labeled as follows:

[0030] 1-Laser assembly, 10-Laser unit, 2-Optical signal preprocessing assembly, 20-Converging lens, 21-Optical isolator, 22-Transimpedance amplifier, 23-Bracket, 24-Collimating lens, 3-Integrated fiber array assembly, 300-First fiber array, 301-First fixing block, 3000-Third reflecting surface, 310-Second fiber array, 311-Second fixing block, 3100-First reflecting surface, 3110-Second reflecting surface, 4-Photodetector, 5-Base, 50-Boss. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0033] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0034] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0035] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other, such as "optical coupling" or "wireless connection." The embodiments disclosed herein are not necessarily limited to the scope of this invention.

[0036] In the description of this utility model, the expression "A and / or B" (where A and B are used to formally represent specific features) will be involved. The corresponding expression includes the following three combinations: only A, only B, and a combination of A and B.

[0037] As used in this invention, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the specified value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the specified quantity (i.e., the limitations of the measurement system).

[0038] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0039] Example 1:

[0040] Embodiment 1 of this utility model provides an optical coupling component based on a hybrid integrated FA array, such as... Figure 1 As shown, it includes: a laser assembly 1, an optical signal preprocessing assembly 2, an integrated fiber array assembly 3, multiple photodetectors 4, and a base 5; the laser assembly 1, the optical signal preprocessing assembly 2, and the integrated fiber array assembly 3 are arranged in sequence coupled along the optical path, and the laser assembly 1, the optical signal preprocessing assembly 2, the integrated fiber array assembly 3, and the photodetectors 4 are disposed on the base 5; wherein, the laser assembly 1 includes multiple laser units 10, and each laser unit 10 corresponds to one photodetector 4.

[0041] The integrated fiber array assembly 3 includes a first fiber array 300 and a second fiber array 310. The first fiber array 300 and the second fiber array 310 are stacked vertically or placed horizontally side by side. The photodetector 4 is disposed below the second fiber array 310. The first fiber array 300 is used to transmit the optical signal emitted by the laser assembly 1 to the other end. The second fiber array 310 is used to receive the optical signal from the other end.

[0042] In one embodiment, when the first fiber array 300 and the second fiber array 310 are placed vertically overlapping each other, the first fiber array 300 is located above the second fiber array 310, the first fiber array 300 is part of TOSA, and the second fiber array 310 is part of ROSA.

[0043] By placing the first fiber array 300 and the second fiber array 310 vertically overlapping or horizontally side by side to form an integrated fiber array assembly 3, the structure is more compact compared to the existing separate designs of TOSA and ROSA, reducing the volume occupied by the first fiber array 300 and the second fiber array 310 in a limited space. At the same time, when assembling the first fiber array 300 and the second fiber array 310 to form the integrated fiber array assembly 3, a portion of the optical path for the optical signal to enter the first fiber array 300 and the optical path for the return optical signal to exit from the second fiber array 310 are pre-defined. When installing the integrated fiber array assembly 3 in the optical coupling assembly, it is only necessary to align the transmitting end of the second fiber array 310 with the photodetector 4, making installation convenient and simple.

[0044] The TOSA30 in the aforementioned integrated fiber array assembly 3 is used to receive the laser signal emitted by the laser unit, and the ROSA31 is connected to an external light source to input the returned light signal emitted by the external light source into the photodetector 4. Based on this, in one embodiment, the first fiber array 300 and the first fixed block 301, as well as the second fiber array 310 and the second fixed block 311, have the following two arrangement forms, see reference. Figure 2aAs shown, the integrated fiber optic array assembly 3 includes a first fixing block 301 and a second fixing block 311. The first fiber optic array 300 is fixedly disposed between the first fixing block 301 and the second fixing block 311, and the second fiber optic array 310 is fixedly disposed between the base 5 and the second fixing block 311. The light outlet of the second fiber optic array 310 is provided with a first reflecting surface 3100, and the end face of the second fixing block 311 is provided with a second reflecting surface 3110. The second reflecting surface 3110 is disposed close to the optical signal preprocessing assembly 2. The first reflecting surface 3100 is used to reflect the optical signal transmitted from the second fiber optic array 310 into the photodetector 4, and the second reflecting surface 3110 is used to reflect the optical signal emitted by the laser assembly 1 into the first fiber optic array 300.

[0045] The first fiber array 300 includes a plurality of first fiber units, each of which corresponds to a laser unit 10. The second fiber array 310 includes a plurality of second fiber units, each of which corresponds to a photodetector 4. The second reflective surface 3110 is used to reflect the light signal emitted by the laser assembly 1 into the first fiber array 300, and the first reflective surface 3100 is used to reflect the light signal returned from the second fiber array 310 into the photodetector 4.

[0046] The first reflective surface 3100 and the second reflective surface 3110 are ground and polished at a preset angle, which can be 42.5 degrees or 45 degrees. In the actual processing, the polishing angle can be set according to the actual needs, and no specific limitation is made here. During the grinding process, since the optical fiber is easily damaged, the second optical fiber array 310 and the second fixing block 311 can be fixed and ground together to reduce the possibility of optical fiber damage during the grinding process.

[0047] In order to enable the optical signal to enter the first optical fiber array 300, the receiving end of the first optical fiber array 300 is provided with a third reflective surface 3000. The optical signal emitted by the laser component 1 is reflected by the second reflective surface 3110 to the third reflective surface 3000, and the third reflective surface 3000 reflects the optical signal into the first optical fiber array 300.

[0048] In order to ensure that the second reflective surface 3110 can reflect the light signal to the third reflective surface 3000, the end of the third reflective surface 3000 extends beyond the top of the second fixing block 311 by a predetermined distance to receive the light signal reflected by the second reflective surface 3110. This predetermined distance ensures that the second reflective surface 3110 can reflect the light signal to the third reflective surface 3000, and is not specifically limited here. Figure 2bAs shown, taking the polishing of the second reflective surface 3110 at an angle of 42.5 degrees or 45 degrees as an example, when the angle of the second reflective surface 3110 is 42.5 degrees, the angle of the third reflective surface 3000 is 47.5 degrees; when the angle of the second reflective surface 3110 is 45 degrees, the angle of the third reflective surface 3000 is 45 degrees, and so on, so that the optical signal accurately enters the first fiber array 300 for signal transmission after being reflected by the third reflective surface 3000.

[0049] In order for the optical signal to enter the first fiber array 300, such as Figure 2c As shown, the optical signal emitted by the laser assembly 1 is directly transmitted to the first fiber array 300 after passing through the optical signal preprocessing assembly 2. The second fiber array 310 receives the returned optical signal, which is then reflected by the first reflective surface 3100 and enters the photodetector 4. Figure 2d As shown, Figure 2c In the corresponding 3D view, when this scheme is adopted, the receiving end face of the first fiber array 300 and the first fixing block 301 is perpendicular to the horizontal plane and flush with the upper surface of the second fixing block 311.

[0050] Unlike the aforementioned embodiments, this utility model also provides a second embodiment, in which the first fiber array 300 and the second fiber array 310 are placed horizontally side by side, as shown below. Figure 3a As shown, the integrated fiber optic array assembly 3 includes a first fixing block 301 and a second fixing block 311, with the first fiber optic array 300 and the second fiber optic array 310 located between the first fixing block 301 and the second fixing block 311. In both of the above configurations, the second fiber optic array 310 is correspondingly positioned to the photodetector 4. When the first fiber optic array 300 and the second fiber optic array 310 are located between the first fixing block 301 and the second fixing block 311, a boss 50 is provided on the base 5, the boss 50 corresponding to the second fiber optic array 310, and the photodetector 4 is positioned on the boss 50.

[0051] In the second embodiment, the optical signal can directly enter the first fiber array 300 (e.g., Figure 2c (as shown); or enter the first fiber array 300 through two reflections (such as...). Figure 2b (As shown in the diagram), the specific structural design is detailed in the preceding description and will not be specifically limited here.

[0052] Based on the solutions provided in the above embodiments, this utility model provides two solutions for optical signal preprocessing component 2. The first solution for optical signal preprocessing component 2 is as follows: Figure 1and Figure 2a As shown, the optical signal preprocessing component 2 includes a converging lens 20, an optical isolator 21, and a transimpedance amplifier 22. The optical isolator 21 is fixedly mounted on a bracket 23, and the transimpedance amplifier 22 is located below the bracket 23. The laser component 1, the converging lens 20, the optical isolator 21, and the integrated fiber array component 3 are arranged sequentially. Specifically, the bracket 23 is U-shaped, elevating the optical isolator 21, and the transimpedance amplifier 22 is positioned in the space below it. The optical isolator 21 is bonded to the bracket 23 using conductive silver paste.

[0053] The second optical signal preprocessing component 2 scheme is as follows: Figure 3a As shown, the optical signal preprocessing component 2 includes a converging lens 20, an optical isolator 21, and a collimating lens 24; the laser component 1, the collimating lens 24, the optical isolator 21, the converging lens 20, and the integrated fiber array component 3 are arranged sequentially. Figure 3b and Figure 3c As shown, the optical signal emitted by the laser assembly 1 passes through the collimating lens 24, the optical isolator 21, and the converging lens 20, and is reflected on the second reflecting surface 3110. After being reflected to the third reflecting surface 3000, it enters the first fiber array 300. The second fiber array 310 receives the optical signal from the other end, and the optical signal enters the photodetector 4 after being reflected by the first reflecting surface 3100.

[0054] In the above scheme, the base 5 can be made of tungsten copper, and the photodetector 4, the first fixing block 301 and the second fixing block 311 are bonded to the base 5 with UV glue.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An optical coupling component based on a hybrid integrated FA array, characterized in that, include: The laser assembly (1), optical signal preprocessing assembly (2), integrated fiber array assembly (3), multiple photodetectors (4), and base (5) are arranged in sequence along the optical path and coupled together. The laser assembly (1), optical signal preprocessing assembly (2), integrated fiber array assembly (3), and photodetectors (4) are disposed on the base (5). The integrated fiber array assembly (3) includes a first fiber array (300) and a second fiber array (310). The first fiber array (300) and the second fiber array (310) are stacked vertically or placed horizontally side by side. The photodetector (4) is located below the second fiber array (310). The first fiber array (300) is used to transmit the optical signal emitted by the laser assembly (1) to the other end; The second fiber array (310) is used to receive optical signals from the other end.

2. The optical coupling component based on a hybrid integrated FA array according to claim 1, characterized in that, The integrated fiber array assembly (3) includes a first fixing block (301) and a second fixing block (311). The first fiber array (300) is fixedly disposed between the first fixing block (301) and the second fixing block (311), and the second fiber array (310) is fixedly disposed between the base (5) and the second fixing block (311).

3. The optical coupling component based on a hybrid integrated FA array according to claim 2, characterized in that, The second fiber array (310) has a first reflective surface (3100) at its light output port, and the second fixed block (311) has a second reflective surface (3110) at its end face. The second reflective surface (3110) is located close to the optical signal preprocessing component (2). The first reflective surface (3100) is used to reflect the optical signal transmitted from the second fiber array (310) into the photodetector (4), and the second reflective surface (3110) is used to reflect the optical signal emitted by the laser component (1) into the first fiber array (300).

4. The optical coupling component based on a hybrid integrated FA array according to claim 3, characterized in that, The receiving end of the first fiber array (300) is provided with a third reflective surface (3000). The optical signal emitted by the laser assembly (1) is reflected by the second reflective surface (3110) to the third reflective surface (3000), and the third reflective surface (3000) reflects the optical signal into the first fiber array (300).

5. The optical coupling component based on a hybrid integrated FA array according to claim 4, characterized in that, The end of the third reflective surface (3000) extends beyond the top of the second fixing block (311) by a predetermined distance to receive the light signal reflected by the second reflective surface (3110).

6. The optical coupling component based on a hybrid integrated FA array according to claim 1, characterized in that, The integrated fiber array assembly (3) includes a first fixing block (301) and a second fixing block (311), with the first fiber array (300) and the second fiber array (310) located between the first fixing block (301) and the second fixing block (311).

7. The optical coupling component based on a hybrid integrated FA array according to claim 6, characterized in that, The base (5) is provided with a boss (50), which is provided corresponding to the second fiber array (310), and the photodetector (4) is provided on the boss (50).

8. The optical coupling component based on a hybrid integrated FA array according to claim 1, characterized in that, The optical signal emitted by the laser assembly (1) is directly transmitted to the first fiber array (300) after passing through the optical signal preprocessing assembly (2).

9. The optical coupling component based on a hybrid integrated FA array according to any one of claims 1-8, characterized in that, The optical signal preprocessing component (2) includes a converging lens (20), an optical isolator (21), and a transimpedance amplifier (22); the optical isolator (21) is fixedly mounted on a bracket (23), the transimpedance amplifier (22) is mounted below the bracket (23), and the laser component (1), the converging lens (20), the optical isolator (21), and the integrated fiber array component (3) are arranged in sequence.

10. The optical coupling component based on a hybrid integrated FA array according to any one of claims 1-8, characterized in that, The optical signal preprocessing component (2) includes a converging lens (20), an optical isolator (21), and a collimating lens (24); the laser component (1), the collimating lens (24), the optical isolator (21), the converging lens (20), and the integrated fiber array component (3) are arranged in sequence.

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