Optical receiving assembly and optical module
By adding a receiver FA pad and a reflective inclined lens array to the optical receiver assembly, the problems of low coupling efficiency and component damage in conventional optical receiver assemblies are solved, achieving more efficient signal-optical coupling and reducing the risk of damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ACCELIGHT TECHNOLOGIES (WUHAN) CO LTD
- Filing Date
- 2025-10-27
- Publication Date
- 2026-08-04
AI Technical Summary
Conventional optical receiving components have low coupling efficiency, and direct coupling can easily damage components such as the FA cover plate and PD chip.
A receiver FA pad is added to the optical receiver assembly, and a reflective slope and lens array are set. The signal light is reflected to the lens array for shaping by the reflective slope, so that the signal light is focused on the photosensitive surface of the PD array. The receiver FA pad also increases the operating space during coupling.
It improves coupling efficiency, reduces the risk of component damage during coupling, and improves return loss parameters.
Smart Images
Figure CN224594889U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical communication technology, specifically to an optical receiving component and an optical module. Background Technology
[0002] With the rapid growth of data center interconnect applications, the demand for high-speed optical modules is increasing daily, and the requirements for the design of optical receiving components and the packaging of optical devices are also gradually increasing.
[0003] like Figure 1 As shown, conventional optical receiver component solutions employ a design where the FA (Fiber Array) is directly coupled to the PD. The photosensitive surface diameter of the PD used in high-speed optical modules such as 800G and 1.6T is typically less than 20μm. This conventional approach results in low coupling efficiency, making it difficult to meet the performance requirements of high-speed optical modules. Furthermore, direct coupling may cause collisions due to excessively close proximity, potentially damaging components such as the FA cover and the PD chip. Utility Model Content
[0004] The purpose of this invention is to provide an optical receiving component and an optical module to solve the problems of low coupling efficiency in the direct coupling method of the receiving end, and the easy damage to components such as the FA cover plate and PD chip during the coupling process when the FA is directly mounted on the PCB.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: In a first aspect, the present invention provides an optical receiving component, which includes: a PCB board, a receiving end FA, a lens array, a PD array, and a receiving end FA pad; The receiver FA pad is mounted on the PCB board, and the receiver FA is mounted on the receiver FA pad; the light-emitting end of the receiver FA is provided with a reflective slope, and the lens array is located on the lower side of the reflective slope. The signal light received by the receiver FA is reflected by the reflective inclined plane to the lens array, and then enters the PD array through the lens array.
[0006] In the above scheme, the PD array is set on the PCB board.
[0007] In the above scheme, the angle of the reflecting slope is less than or equal to 45°.
[0008] In the above scheme, the angle of the reflective slope is 41.5°.
[0009] In the above scheme, the receiving end FA includes an optical fiber array, an FA cover plate, and an FA substrate. The FA cover plate is disposed on the receiving end FA pad, the FA substrate is disposed on the FA cover plate, and the optical fiber array passes through the FA cover plate and the FA substrate.
[0010] In the above scheme, the lens array is located on the underside of the FA cover plate.
[0011] In the above scheme, the receiving end FA pad is recessed by a first distance relative to the reflective slope.
[0012] In the above scheme, the first distance is 0.5~3mm.
[0013] In the above scheme, the optical receiving component also includes an MPO interface, which is connected to the receiving end FA, and the signal light enters the receiving end FA through the MPO interface.
[0014] Secondly, the present invention provides an optical module, which includes the optical receiving component described in any one of the first aspects.
[0015] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects: This invention provides an optical receiving component, which adds a receiving end FA spacer. By raising the receiving end FA with the receiving end FA spacer, the operating space during coupling can be increased, effectively reducing the risk of damage to components such as the receiving end FA and PD array during coupling. In addition, the light-emitting end of the receiving end FA is provided with a reflective slope, and a lens array is arranged on the lower side of the reflective slope. The signal light received by the receiving end FA can be reflected to the lens array for shaping, so that the signal light is focused on the photosensitive surface of the PD array, thereby improving the coupling efficiency of the receiving end.
[0016] Furthermore, when the angle of the reflective slope is less than 45°, the reflected signal light will not be perpendicular to the photosensitive surface of the PD array after passing through the lens array, thus improving the return loss parameter.
[0017] Furthermore, the receiving end FA pad is recessed by a first distance relative to the reflective slope, which further improves the operating space during coupling and avoids mechanical damage to components such as the receiving end FA and PD array during the coupling process. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of a conventional optical receiving component structure; Figure 2 A schematic diagram of the overall structure of an optical module provided in an embodiment of this utility model; Figure 3 A method provided for embodiments of this utility model Figure 2 A magnified view of a section at point C.
[0019] In the diagram: 100, PCB board; 200, optical receiver assembly; 210, receiver FA; 211, FA substrate; 212, FA cover plate; 220, lens array; 230, PD array; 240, receiver FA pad; 300, MPO interface. Detailed Implementation
[0020] 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. All other embodiments obtained by those skilled in the art based on the embodiments provided by this utility model without inventive effort are within the scope of protection of this utility model.
[0021] Obviously, the accompanying drawings described below are merely some examples or embodiments of this utility model. Those skilled in the art can apply this utility model to other similar scenarios without any creative effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this utility model, any changes to the design, manufacturing, or production methods based on the disclosed technical content are merely conventional technical means and should not be construed as insufficient disclosure of this utility model.
[0022] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this utility model may be combined with other embodiments without conflict.
[0023] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," "a kind," "the," and similar words used in this utility model do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this utility model are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms "connected," "linked," "coupled," and similar words used in this utility model are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A plurality" used in this utility model refers to two or more. The "and / or" operator describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. The terms "first," "second," and "third" used in this utility model are merely to distinguish similar objects and do not represent a specific ordering of the objects.
[0024] like Figure 1 As shown, conventional optical receiver solutions employ a design where the FA (Fiber Array) is directly coupled to the PD. This direct coupling method at the receiver end has low coupling efficiency, and since the FA is directly mounted on the PCB, it is prone to damage to components such as the FA cover and the PD chip during the coupling process.
[0025] To address this, the present invention provides an optical receiving component and an optical module. The optical receiving component is equipped with a receiving end FA spacer. By raising the receiving end FA with the receiving end FA spacer, the operating space during coupling can be increased, effectively reducing the risk of damage to components such as the receiving end FA and PD array during coupling. In addition, the light-emitting end of the receiving end FA is provided with a reflective slope, and a lens array is provided on the lower side of the reflective slope. The signal light received by the receiving end FA can be reflected to the lens array for shaping, so that the signal light is focused on the photosensitive surface of the PD array, thereby improving the coupling efficiency of the receiving end.
[0026] like Figure 2 and Figure 3As shown, the optical receiving component 200 provided in this embodiment of the present invention includes a PCB board 100, a receiver FA 210, a lens array 220, a PD array 230, and a receiver FA spacer 240. The PD array 230 and the receiver FA spacer 240 are disposed on the PCB board 100, and the receiver FA 210 is disposed on the receiver FA spacer 240. The receiver FA spacer 240 raises the optical path, thereby increasing the operating space during coupling. The light-emitting end of the receiver FA 210 has a reflective slope, and the lens array 220 is disposed below the reflective slope and located in the optical path between the receiver FA 210 and the PD array 230 to shape the signal light.
[0027] The receiver FA210 is connected to the MPO interface 300, and the signal light enters the receiver fiber array through the MPO interface 300. The output end of the receiver FA210 is angled, forming a reflective slope that reflects the signal light to the lens array 220 for reshaping, thereby focusing the signal light onto the photosensitive surface of the PD array 230. The angle of the reflective slope at the FA output end is less than or equal to 45°, where the angle refers to the angle between the reflective slope and the lower end face of the receiver FA210. When this angle is less than 45°, the reflected signal light after passing through the lens array 220 is not perpendicular to the photosensitive surface of the PD array 230, thus improving the return loss parameter.
[0028] To ensure the signal light is successfully reflected at the reflecting slope, the receiver FA210 can be made of a high-refractive-index material, thus enabling total internal reflection of the signal light at the reflecting slope. Of course, the receiver FA210 can also be made of other materials; simply adding a reflective film to the reflecting slope will suffice.
[0029] In this embodiment, the receiver FA210 includes an optical fiber array FA, an FA cover plate 212, and an FA substrate 211. The FA cover plate 212 is disposed on the receiver FA pad 240, and the FA substrate 211 is disposed on the FA cover plate 212. The optical fiber array passes between the FA cover plate 212 and the FA substrate 211 for transmitting optical signals. At this time, the lens array 220 can be disposed on the underside of the FA cover plate, located on the reflected light transmission optical path, to shape the emitted signal light and converge the signal light onto the photosensitive surface of the PD array 230 to improve coupling efficiency.
[0030] In a preferred embodiment, the receiving end FA pad 240 is recessed relative to the reflecting slope by a first distance, such as... Figure 3 As shown, the first distance is preferably 0.5~3mm. For example, the receiver FA pad 240 can be designed to be recessed by 1.5mm, which can further improve the operating space during coupling.
[0031] Therefore, compared with conventional solutions, this invention can improve the coupling efficiency of the receiver and effectively reduce the risk of damage to components such as the receiver FA and PD array during the coupling process.
[0032] Specifically, such as Figure 2 and Figure 3 As shown, the optical receiving component 200 of this embodiment includes a PCB board 100, a receiver FA 210, a lens array 220, a PD array 230, and a receiver FA pad 240. The PD array 230 and the receiver FA pad 240 are mounted on the PCB board 100, the receiver FA 210 is mounted on the receiver FA pad 240, and the lens array 220 is mounted on the underside of the FA cover plate 212 of the receiver FA 210.
[0033] The receiver FA210 is connected to the MPO interface 300. Signal light enters the receiver FA210 through the MPO interface 300. The output end of the receiver FA210 is angled at 41.5°, reflecting the signal light to the lens array 220 for reshaping, converging the signal light onto the photosensitive surface of the PD array 230, thus improving coupling efficiency. Simultaneously, the reflected signal light, after passing through the lens array, does not incident perpendicularly on the photosensitive surface of the PD array 230, improving return loss parameters. The receiver FA210 is mounted on the receiver FA pad 240, which is recessed by a first distance relative to the reflecting angle. This increases the operating space during coupling while preventing damage to components such as the receiver FA210 and the PD array 230 during coupling. The angle of the output end of the receiver FA210 and the first distance the receiver FA pad 240 is recessed relative to the reflecting angle can be adjusted according to actual design requirements, as long as the angle is less than or equal to 45°.
[0034] In addition, this utility model also provides an optical module, which includes the optical receiving component described in any of the above-mentioned methods, so as to improve the coupling efficiency of the receiving end and reduce the risk of damage to components such as FA and PD array during the coupling process.
[0035] In summary, this invention provides an optical receiving component and an optical module. The optical receiving component incorporates a receiving end FA spacer. By elevating the receiving end FA with the spacer, the operating space during coupling is increased, effectively reducing the risk of damage to components such as the receiving end FA and the PD array during coupling. Furthermore, the receiving end FA spacer can be recessed relative to the reflecting slope by a first distance, further increasing the operating space during coupling and preventing mechanical damage to components such as the receiving end FA and the PD array during coupling. In addition, the light-emitting end of the receiving end FA has a reflecting slope, and a lens array is arranged on the lower side of the reflecting slope. This reflects the signal light received by the receiving end FA to the lens array for shaping, converging the signal light onto the photosensitive surface of the PD array, improving the coupling efficiency of the receiving end. Moreover, when the angle of the reflecting slope is less than 45°, the reflected signal light after passing through the lens array is not perpendicular to the photosensitive surface of the PD array, improving the return loss parameter.
[0036] It should be noted that, depending on the implementation needs, the various steps / components described in this utility model can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this utility model.
[0037] Those skilled in the art will readily understand that the above are merely preferred embodiments of the present utility model and are 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 receiving component, characterized in that, The optical receiving assembly includes: a PCB board, a receiver FA, a lens array, a PD array, and a receiver FA pad; The receiver FA pad is mounted on the PCB board, and the receiver FA is mounted on the receiver FA pad; the light-emitting end of the receiver FA is provided with a reflective slope, and the lens array is located on the lower side of the reflective slope. The signal light received by the receiver FA is reflected by the reflective inclined plane to the lens array, and then enters the PD array through the lens array.
2. The optical receiving component according to claim 1, characterized in that, The PD array is mounted on the PCB board.
3. The optical receiving component according to claim 1, characterized in that, The angle of the reflecting slope is less than or equal to 45°.
4. The optical receiving component according to claim 2 or 3, characterized in that, The angle of the reflecting slope is 41.5°.
5. The optical receiving component according to claim 1, characterized in that, The receiver FA includes an optical fiber array, an FA cover plate, and an FA substrate. The FA cover plate is disposed on the receiver FA pad, the FA substrate is disposed on the FA cover plate, and the optical fiber array passes through the FA cover plate and the FA substrate.
6. The optical receiving component according to claim 5, characterized in that, The lens array is located on the underside of the FA cover plate.
7. The optical receiving component according to claim 5, characterized in that, The receiving end FA pad is recessed by a first distance relative to the reflecting slope.
8. The optical receiving component according to claim 7, characterized in that, The first distance is 0.5~3mm.
9. The optical receiving component according to claim 1, characterized in that, The optical receiving component also includes an MPO interface, which is connected to the receiving end FA, and the signal light enters the receiving end FA through the MPO interface.
10. An optical module, characterized in that, The optical module includes the optical receiving component as described in any one of claims 1 to 9.