Double-layer multi-channel active emission optical module

Abstract

The invention discloses a double-layer multi-channel active emission optical module which comprises an upper layer printed circuit board and a lower layer printed circuit board which are arranged in parallel. The upper layer printed circuit board is provided with a first LD laser, and a path of light waves generated by the first LD laser is provided with a first wave division assembly and a light wave transmission assembly; the lower layer printed circuit board is provided with a second LD laser, and a path of light waves generated by the second LD laser is provided with a second wave division assembly and a light wave receiving assembly. Through the layered design, heat generated by each layer of laser is effectively reduced, so that the heat dissipation effect is optimized, the influence of the heat on an optical path is reduced, meanwhile, the transverse space of the optical module is saved, and the stability of the optical path is improved.

Description

Technical Field

[0001] The invention relates to an active emission optical module, belongs to the technical field of optical modules, and in particular to a double-layer multi-channel active emission optical module. Background Art

[0002] With the explosive growth of global data traffic and the rapid development of 5G communication technology, optical fiber communication plays an increasingly important role in modern communication networks. Optical communication has significant advantages such as large transmission capacity, long transmission distance, and anti-electromagnetic interference, and has become the core infrastructure supporting high-speed Internet and big data transmission. In this context, as a key component in the optical communication system, the performance and reliability of the optical module directly affect the quality of the entire communication system.

[0003] Especially in scenarios such as data centers, the transmission rate has rapidly evolved from 10Gbps to 100Gbps or even 400Gbps, which poses a more severe challenge to the design of optical modules. In order to meet the needs of high-speed transmission, multi-channel parallel transmission technology is widely adopted. However, in existing multi-channel transmitting optical modules, since multiple optical components (such as lasers, monitor photodiodes, etc.) are arranged on the same plane level, this planar structure has significant defects: first, the high integration of components leads to significant local heat accumulation and low heat dissipation efficiency; second, heat accumulation will cause thermal deformation and optical path deviation of optical components, which directly affects the quality and stability of optical signals; in addition, the increase in temperature will accelerate the aging of components and reduce the service life of optical modules.

[0004] In the face of the above technical difficulties, it is particularly urgent to develop a new multi-channel active transmission optical module with optimized thermal management capabilities and optical path stability. This is not only related to the performance improvement of a single optical module, but also has an important impact on the reliability and economy of the entire optical communication system. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a double-layer multi-channel active emission optical module in response to the technical defects existing in the prior art. The double-layer multi-channel active emission optical module effectively reduces the heat generated by each layer of laser through a layered design, thereby optimizing the heat dissipation effect and reducing the impact of heat on the optical path, while saving the lateral space of the optical module and improving the stability of the optical path.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the present invention discloses a double-layer multi-channel active emission optical module, comprising an upper printed circuit board and a lower printed circuit board arranged in parallel; a first LD laser is arranged on the upper printed circuit board, and a first wave splitter component and a light wave transmission component for transmitting the light wave from the upper layer to the lower layer are arranged on the path of the light wave generated by the first LD laser; a second LD laser is arranged on the lower printed circuit board, and a second wave splitter component and a light wave receiving component for receiving the light wave transmitted by the light wave transmission component are arranged on the path of the light wave generated by the second LD laser.

[0007] In a preferred embodiment of the present invention, the light wave transmission component includes a first wedge-shaped prism, a second wedge-shaped prism, a first 45-degree reflecting prism and a second 45-degree reflecting prism.

[0008] In a preferred embodiment of the present invention, the first wave splitter comprises a first lens, a first filter, a first prism and a first polarizing prism arranged in sequence.

[0009] In a preferred embodiment of the present invention, a first 1 / 4 wave plate is arranged between the first wedge prism and the first polarizing prism.

[0010] In a preferred embodiment of the present invention, the optical wave receiving component includes a third 45-degree reflecting prism, and the arrangement position of the third 45-degree reflecting prism and the second 45-degree reflecting prism corresponds to each other.

[0011] In a preferred embodiment of the present invention, the third 45-degree reflecting prism refracts the received light waves to the second wave splitter.

[0012] In a preferred embodiment of the present invention, the second wavelength splitter comprises a second lens, a second filter, a second prism, a second polarizing prism and a collimator which are arranged in sequence.

[0013] In a preferred embodiment of the present invention, a second 1 / 4 wave plate is arranged between the second polarizing prism and the collimator.

[0014] In a preferred embodiment of the present invention, a first light source, a photodetector and a signal processor are also provided on the upper printed circuit board. The photodetector and the signal processor are electrically connected. The light waves emitted by the first light source are refracted by the first wedge-shaped prism and then transmitted to the photodetector.

[0015] In a preferred embodiment of the present invention, the upper printed circuit board and the lower printed circuit board are connected via a space support.

[0016] In a preferred embodiment of the present invention, the optical path is as follows: the light wave generated by the first LD laser located in the upper layer is focused and converged by the first lens and transmitted to the first filter; after being filtered by the first filter, it propagates in the first prism, and after multiple reflections and filtering in the first prism, the light wave is combined and isolated and filtered by the first polarization prism and the first 1 / 4 wave plate; then the light wave is emitted from the first 1 / 4 wave plate and transmitted to the first wedge prism, the light wave is refracted and then incident on the second wedge prism and then continues to refract and transmit to the first 45-degree reflecting prism; the first 45-degree reflecting prism reflects the light wave to the second 45-degree reflecting prism, and the second 45-degree reflecting prism reflects the light wave to the third 45-degree reflecting prism located in the lower layer, and the third 45-degree reflecting prism The reflecting prism reflects the light wave to the second prism; the light wave generated by the second LD laser located in the lower layer is focused and converged by the second lens and transmitted to the second filter; after being filtered by the second filter, it propagates in the second prism; at the same time, the light wave of the upper layer is reflected by the third 45-degree reflecting prism to the second prism of the lower layer, and combined with this light wave, after multiple reflections in the second prism, it is isolated and filtered by the second polarizing prism and the second 1 / 4 wave plate; then the light wave is emitted from the second 1 / 4 wave plate, received and emitted by the collimator; the first light source located in the upper layer emits a light wave to the reflecting surface of the first wedge-shaped prism, and the light wave is reflected by the reflecting surface of the first wedge-shaped prism to the surface of the photodetector and received by it, and then the photodetector transmits the signal to the signal processor.

[0017] The beneficial effects of the present invention are as follows: the double-layer multi-channel active emission optical module of the present invention has achieved a number of significant technological breakthroughs and optimization effects through innovative structural design, and can effectively replace the isolator. First, the present invention adopts a double-layer printed circuit board structure, and divides the optical components originally arranged in a plane into two layers, which effectively solves the problem of heat accumulation caused by the concentrated arrangement of multi-channel devices in the traditional single-layer design. This layered arrangement significantly optimizes the heat dissipation effect, effectively prevents the optical path deviation caused by the temperature increase, and improves the stability and reliability of the module.

[0018] Furthermore, the present invention supports the upper and lower layers of PCBA boards through spatial pillars, which not only ensures the mechanical stability of the structure, but also forms an effective heat dissipation channel between the two layers, further enhancing the heat dissipation performance of the module. At the same time, this vertical stacking technical solution greatly saves the lateral space occupied by the module and improves the space utilization efficiency. In terms of optical path design, the innovative combination of wedge prisms and reflectors cleverly realizes the precise connection of the upper and lower optical paths and the combination of multi-channel optical signals, ensuring the accuracy and stability of the optical transmission path.

[0019] To ensure the reliability of signal transmission, the present invention uses a flexible tape to connect the electrical signals of the upper and lower layers of PCBA boards. This flexible connection method not only simplifies the assembly process, but also effectively reduces the impact of mechanical stress on the optical system, further improving the overall performance and service life of the module. Through the organic combination of these innovative designs, the present invention has achieved significant improvements in heat dissipation efficiency, space utilization, structural stability, and optical signal transmission quality, providing reliable technical support for the development of high-speed optical communication systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 is an exploded schematic diagram of the present invention; Figure 2 is a schematic diagram of the present invention; Figure 3 is a side view of the present invention; Figure 4 is a schematic diagram of an upper printed circuit board of the present invention; Figure 5 is a schematic diagram of a lower printed circuit board of the present invention; Figure 6 It is a schematic diagram of the upper optical path propagation of the present invention; Figure 7 It is a schematic diagram of the monitoring optical path of the present invention. DETAILED DESCRIPTION In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] Embodiment 1: This embodiment provides a double-layer multi-channel active transmission optical module, such as Figure 1-3 As shown, the optical module of the present invention adopts an innovative double-layer structure design, mainly including an upper printed circuit board 21 and a lower printed circuit board 2 arranged in parallel. The double-layer structure design of the present invention not only effectively solves the heat accumulation problem in the traditional single-layer optical module, but also significantly improves the space utilization efficiency.

[0022] The structure of the upper optical path system is as follows: Figure 4As shown: The upper printed circuit board 21 of the present invention is provided with a first LD laser 11 as the main light source. To ensure stable transmission and accurate processing of optical signals, a first wavelength division component is provided on the transmission path of the light wave generated by the first LD laser 11. The wavelength division component is composed of a plurality of precision optical components, including a first lens 12, a first filter 13, a first prism 14 and a first polarizing prism 15 arranged in sequence. These optical components are firmly bonded to the upper printed circuit board 21 by high-precision optical glue, ensuring the stability of the optical path system.

[0023] In order to achieve the precise connection between the upper and lower optical paths, this embodiment designs an innovative light wave transmission component. The component includes a first wedge prism 17, a second wedge prism 18, a first 45-degree reflecting prism 19, and a second 45-degree reflecting prism 20. A first 1 / 4 wave plate 16 is specially arranged between the first wedge prism 17 and the first polarizing prism 15. The first 1 / 4 wave plate 16 can achieve isolation filtering, thereby ensuring that the optical path is irreversible, avoiding the optical path return from damaging the first LD laser 11, and further improving the transmission quality of the optical signal. These light wave transmission components are also firmly bonded to the upper printed circuit board 21 with high-precision optical glue.

[0024] The structure of the upper optical path system is as follows: Figure 5 As shown. A second LD laser 8 is provided on the lower printed circuit board 2 of the present invention as an auxiliary light source. In order to receive and process the optical signal from the upper layer, a second wave splitter assembly and an optical wave receiving assembly are configured on the optical wave transmission path of the second LD laser 8. The core component of the optical wave receiving assembly is the third 45-degree reflecting prism 10, and its installation position precisely corresponds to the second 45-degree reflecting prism 20 of the upper layer, ensuring the accurate transmission of the optical signal. After receiving the optical signal, the third 45-degree reflecting prism 10 refracts it to the second wave splitter assembly for further processing.

[0025] The second wave splitter adopts a multi-stage optical processing structure, including a second lens 7, a second filter 6, a second prism 5, a second polarizing prism 4 and a collimator 1 arranged in sequence. In order to optimize the quality of the optical signal, a second 1 / 4 wave plate 3 is also arranged between the second polarizing prism 4 and the collimator 1. The second 1 / 4 wave plate 3 can achieve isolation filtering, thereby ensuring that the optical path is irreversible and avoiding the optical path returning to damage the second LD laser 8. This multi-stage optical processing structure ensures high-quality transmission and accurate wave combining of optical signals.

[0026] The present invention also adds a monitoring system. In order to realize real-time monitoring of the working state of the optical module, the present embodiment also integrates a complete monitoring system on the upper printed circuit board 21. The system includes a first light source 22, a photodetector 23 and a signal processor 24. Among them, the photodetector 23 is electrically connected to the signal processor 24 to form a closed-loop monitoring circuit. The light wave emitted by the first light source 22 is refracted by the first wedge prism 17 and then transmitted to the photodetector 23. Through this design, real-time monitoring of the optical path system is realized.

[0027] To ensure the mechanical stability and reliability of the entire optical module, the upper printed circuit board 21 and the lower printed circuit board 2 are physically connected by a space support 9. This connection method not only provides stable mechanical support, but also forms an effective heat dissipation channel between the two layers of circuit boards. At the same time, in order to realize signal transmission between the upper and lower circuit boards, the two layers of circuit boards are connected by a flexible communication belt 25. This flexible connection method can effectively reduce the impact of mechanical stress on the optical system and improve the reliability of the system.

[0028] The double-layer multi-channel active emission optical module of this embodiment achieves excellent heat dissipation performance and stable optical signal transmission through innovative structural design and precise optical system layout. The double-layer structural design not only solves the heat accumulation problem in the traditional single-layer design, but also improves the space utilization efficiency. The accuracy and reliability of optical signal transmission are ensured through the precise configuration of multi-level optical components and advanced monitoring system. The present invention provides reliable technical support for the development of high-speed optical communication systems.

[0029] Embodiment 2: This embodiment describes in detail the working principle of a double-layer multi-channel active transmission optical module. Figure 6-7 The optical module achieves efficient and stable optical signal transmission through innovative double-layer structure design and precise optical component configuration, effectively solving technical problems such as heat dissipation and optical path stability faced by traditional single-layer optical modules.

[0030] In the upper optical path transmission system, the first LD laser 11 located on the upper printed circuit board 21 serves as the main light source to emit light waves. To ensure the quality of the optical signal, the light wave is first focused and converged by the first lens 12. This process effectively improves the energy density of the optical signal and lays the foundation for subsequent signal processing. The focused light wave is then transmitted to the first filter 13 for preliminary filtering to remove the clutter components in the signal. The filtered light signal enters the first prism 14 and is reflected multiple times through a carefully designed optical path inside it. This multiple reflection process not only further purifies the optical signal, but also realizes the preliminary combination of light waves, significantly improving the signal quality.

[0031] In order to ensure the unidirectionality and safety of optical signal transmission, the present invention sets a key protection mechanism in the optical path. After passing through the first polarization prism 15, the optical signal needs to be processed by the first 1 / 4 wave plate 16. The first 1 / 4 wave plate 16 plays a crucial role in isolation and filtering. By changing the polarization state of the light wave, the unidirectional transmission characteristics of the optical path are ensured, and the optical signal reflection back is effectively prevented from damaging the first LD laser 11. This design greatly improves the reliability and service life of the system.

[0032] A major innovation of the present invention lies in its unique light wave transmission system design. After the light signal processed as described above is emitted from the first 1 / 4 wave plate 16, it enters a carefully designed light wave transmission system. The system first refracts accurately through the first wedge prism 17, and the refracted light signal continues to enter the second wedge prism 18 for secondary refraction. This innovative double wedge prism design not only ensures the precise control of the light path, but also provides a larger adjustment margin. The light signal passing through the wedge prism system then passes through the first 45-degree reflecting prism 19 and the second 45-degree reflecting prism 20 in turn, achieving precise transmission from the upper layer to the lower layer, and is finally received by the third 45-degree reflecting prism 10 of the lower layer and accurately reflected to the second prism 5.

[0033] In order to realize real-time monitoring of the working state of the system, the present invention integrates a complete monitoring system on the upper printed circuit board 21. The system adopts a unique optical path design: the first light source 22 located in the upper layer emits a monitoring light wave, which is directed to the reflecting surface of the first wedge-shaped prism 17 and directly transmitted to the photodetector 23 after reflection. After receiving the optical signal, the photodetector 23 converts it into an electrical signal and transmits it to the signal processor 24 for real-time analysis and processing, thereby realizing all-round monitoring of the working state of the system.

[0034] In the lower optical path system, the second LD laser 8 located on the lower printed circuit board 2 works as an auxiliary light source at the same time. The light waves it emits are first focused and converged by the second lens 7, and then filtered by the second filter 6. At the same time, the light signal from the upper layer is reflected by the third 45-degree reflecting prism 10 and enters the second prism 5, where it is accurately combined with the light waves generated by the lower light source. The combined light signal is reflected multiple times in the second prism 5 to further improve the signal quality. Similar to the protection design of the upper optical path, a second polarizing prism 4 and a second 1 / 4 wave plate 3 are also provided in the lower optical path to ensure unidirectional transmission of the optical path and prevent the reflection and return of the light signal from damaging the second LD laser 8. The optical signal after this series of precise processing is finally received and emitted by the collimator 1, completing the entire optical signal transmission process.

[0035] The double-layer structure design adopted by the present invention has significant technical advantages. By placing the optical components in the upper and lower layers, the problem of heat accumulation caused by the centralized arrangement of multi-channel devices in the traditional single-layer design is effectively solved. A flexible soft tape is used to connect the electrical signals between the upper and lower layers of PCBA. This design not only ensures the reliability of signal transmission, but also effectively reduces the impact of mechanical stress on the optical system. At the same time, the double-layer structure supported by the space pillar, combined with the precise wedge prism and reflector system, not only the accurate combination of multi-channel optical paths is achieved, but also the structural stability of the entire system and the accuracy of optical signal transmission are guaranteed.

[0036] The technical solution of the present invention successfully solves the key technical problems faced by traditional optical modules, including heat dissipation and optical path stability. Through reasonable structural design and precise optical system configuration, the present invention significantly improves the performance and reliability of optical modules, providing solid technical support for the development of high-speed optical communication systems. The successful implementation of this design marks a major step forward in the multi-channel optical module technology towards higher performance and higher reliability.

[0037] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A double-layer multi-channel active emission optical module, characterized in that: The invention comprises an upper printed circuit board (21) and a lower printed circuit board (2) arranged in parallel; a first LD laser (11) is arranged on the upper printed circuit board (21); a first wave splitter assembly and a light wave transmission assembly for transmitting the light wave from the upper layer to the lower layer are arranged on the path of the light wave generated by the first LD laser (11); and a second LD laser (8) is arranged on the lower printed circuit board (2); a second wave splitter assembly and a light wave receiving assembly for receiving the light wave transmitted by the light wave transmission assembly are arranged on the path of the light wave generated by the second LD laser (8).

2. The double-layer multi-channel active emission optical module according to claim 1, characterized in that: The light wave transmission component comprises a first wedge-shaped prism (17), a second wedge-shaped prism (18), a first 45-degree reflecting prism (19) and a second 45-degree reflecting prism (20).

3. The double-layer multi-channel active emission optical module according to claim 2, characterized in that: The first wave splitter assembly comprises a first lens (12), a first filter (13), a first prism (14) and a first polarizing prism (15) which are arranged in sequence.

4. The double-layer multi-channel active emission optical module according to claim 3, characterized in that: A first quarter wave plate (16) is arranged between the first wedge prism (17) and the first polarization prism (15).

5. The double-layer multi-channel active emission optical module according to claim 4, characterized in that: The light wave receiving component comprises a third 45-degree reflecting prism (10), and the third 45-degree reflecting prism (10) and the second 45-degree reflecting prism (20) are arranged at corresponding positions.

6. The double-layer multi-channel active emission optical module according to claim 5, characterized in that: The third 45-degree reflecting prism (10) refracts the received light waves to a second wavelength splitter assembly; the second wavelength splitter assembly comprises a second lens (7), a second filter (6), a second prism (5), a second polarizing prism (4) and a collimator (1) which are arranged in sequence.

7. The double-layer multi-channel active emission optical module according to claim 6, characterized in that: A second quarter wave plate (3) is arranged between the second polarizing prism (4) and the collimator (1).

8. The double-layer multi-channel active emission optical module according to claim 7, characterized in that: A first light source (22), a photoelectric detector (23) and a signal processor (24) are also provided on the upper printed circuit board (21); the photoelectric detector (23) and the signal processor (24) are electrically connected; and the light waves emitted by the first light source (22) are refracted by the first wedge-shaped prism (17) and then transmitted to the photoelectric detector (23).

9. The double-layer multi-channel active emission optical module according to claim 8, characterized in that: A space pillar (9) is provided between the upper printed circuit board (21) and the lower printed circuit board (2), and the upper printed circuit board (21) and the lower printed circuit board (2) are communicatively connected via a communication belt (25).

10. The double-layer multi-channel active emission optical module according to claim 1, characterized in that: The optical path is as follows: the light wave generated by the first LD laser (11) located in the upper layer is focused and converged by the first lens (12) and transmitted to the first filter (13), and then propagated in the first prism (14) after being filtered by the first filter (13); the light wave is reflected and filtered multiple times in the first prism (14), and then the light wave is combined and isolated and filtered by the first polarizing prism (15) and the first 1 / 4 wave plate (16); the light wave is emitted from the first 1 / 4 wave plate (16) and transmitted to the first wedge prism (17); the light wave is refracted and then incident on the second wedge prism (18) and then further refracted and transmitted to the first 45-degree reflection prism (19); the first 45-degree reflection prism (19) reflects the light wave to the second 45-degree reflection prism (20); the second 45-degree reflection prism (20) reflects the light wave to the third 45-degree reflection prism (10) located in the lower layer; the third 45-degree reflection prism (10) reflects the light wave to the second prism (5); The light wave generated by the second LD laser (8) located at the lower layer is then focused and converged by the second lens (7) and transmitted to the second filter (6). After being filtered by the second filter (6), it propagates in the second prism (5); at the same time, the light wave reflected by the third 45-degree reflecting prism (10) to the lower second prism (5) is combined with the light wave and is reflected multiple times in the second prism (5) before being isolated and filtered by the second polarizing prism (4) and the second 1 / 4 wave plate (3); then the light wave is emitted from the second 1 / 4 wave plate (3) and received and emitted by the collimator (1); The first light source (22) located in the upper layer emits a light wave which is incident on the reflection surface of the first wedge-shaped prism (17). The light wave is reflected by the reflection surface of the first wedge-shaped prism (17) to the surface of the photoelectric detector (23) and is received by the photoelectric detector (23). Then the photoelectric detector (23) transmits the light wave to the signal processor (24).

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