Optical engine and optical module with multi-channel optical transceiver assembly

Abstract

The invention discloses an optical engine with a multi-channel optical transceiver assembly and an optical module. The optical engine comprises a printed circuit board; the multi-channel light emitting assembly is arranged on the printed circuit board, and the multi-channel light emitting assembly comprises a wave combining Z-Block; the transmitting optical fiber is connected with the multi-channel light transmitting assembly; the multi-channel optical receiving assembly is arranged on the printed circuit board, and the multi-channel optical receiving assembly comprises a partial wave Z-Block and is used for carrying out partial wave processing on an input multiplexing optical signal to obtain optical signals of a plurality of optical channels; the receiving optical fiber is connected with the multi-channel optical receiving assembly and is used for inputting the multiplexing optical signal; and the fiber coiling frame is used for coiling the transmitting optical fiber and / or the receiving optical fiber. According to the optical module, low transmission loss, reliable optical fiber path management, optimized space utilization rate and simplified assembly process are realized, and the overall performance and reliability of the optical module are improved.

Description

Technical Field

[0001] The present invention relates to an optical fiber arrangement structure inside an optical module, and in particular to an optical engine and an optical module with a multi-channel optical transceiver component. Background Art

[0002] With the explosive growth of data center traffic, the demand for optical modules with 400G, 800G, and higher speeds in smaller form factors (such as QSFP-DD and OSFP) is becoming increasingly urgent. Among the various technical solutions, those based on EML (electroabsorption modulated laser) and Z-Block free-space optics are considered the preferred choice for meeting the needs of high-speed, long-distance, and high-density transmission due to their potential advantages in insertion loss, isolation, stability, and channel consistency.

[0003] However, amidst the continued miniaturization and increasing integration of optical modules, existing technologies face the following key technical challenges: 1. Fiber management challenges within confined spaces: Within the extremely limited space within a module, effectively coiling, housing, securing, and routing the bare optical fibers used to connect optical components and optical interfaces is a major challenge. 2. Unreliable direct-connect wiring: Due to the limited fiber length, simple direct-connect fiber connections are prone to excessive bending, stretching, and even wear and tear during assembly, transportation, or use due to stress, thermal expansion and contraction, or vibration, seriously affecting reliability.

[0004] In summary, existing fiber coiling solutions have the following limitations: 1. While existing technologies can alleviate the aforementioned issues by using fiber coiling with reserved redundant length, these solutions often suffer from the following deficiencies in highly miniaturized modules: Low space utilization: Failure to fully optimize the fiber coiling area results in wasted space. 2. Poor path planning flexibility: Fibers cannot adapt to complex or changing internal layouts. 3. Unreliable fiber fixation: Fibers may loosen or shift due to vibration or impact. 4. Risk of cross-winding and interference: Improper coiling can easily cause fibers to cross, entangle, or interfere with other components, increasing the risk of loss or damage. 5. Low assembly efficiency: Complex fiber coiling operations can reduce production efficiency and introduce human error. 6. Balancing optical performance and reliability: How to maintain the optical performance advantages of the Z-Block free-space optical path, such as low loss and high isolation, while addressing the aforementioned fiber routing reliability issues through optimized internal structure (particularly the fiber management structure) is key to achieving high-performance, high-reliability miniaturized optical engines.

[0005] Therefore, there is an urgent need for a high-speed optical transceiver component and optical engine technology that can fully utilize the optical advantages of EML and Z-Block solutions and improve space utilization, simplify assembly, and ensure reliable fiber routing in a small space through innovative fiber management design. Summary of the Invention

[0006] This invention provides an optical engine and optical module with a multi-channel optical transceiver assembly, effectively resolving the performance bottlenecks and structural complexity issues inherent in existing technologies and bringing significant technological advancements. First, the invention utilizes a technical solution based on EML and free-space optics Z-Blocks to combine and split optical signals. Compared to traditional AWG solutions, this solution achieves lower insertion loss, higher channel isolation and stability, and better channel consistency. This is crucial for meeting the stringent optical transmission performance requirements of high-speed (e.g., 400G / 800G and above) and long-distance data center interconnect applications.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: the present invention discloses an optical engine with a multi-channel optical transceiver component, comprising a printed circuit board; a multi-channel optical transmitting component, arranged on the printed circuit board, the multi-channel optical transmitting component including a wave-splitting Z-Block for performing wave-splitting processing on optical signals of multiple optical channels; a transmitting optical fiber, connected to the multi-channel optical transmitting component, for outputting the optical signal after wave-splitting processing; a multi-channel optical receiving component, arranged on the printed circuit board, the multi-channel optical receiving component including a wave-splitting Z-Block for performing wave-splitting processing on an input multiplexed optical signal to obtain optical signals of multiple optical channels; a receiving optical fiber, connected to the multi-channel optical receiving component, for inputting the multiplexed optical signal; and a fiber coiling rack, arranged on the printed circuit board, for coiling the transmitting optical fiber and / or the receiving optical fiber.

[0008] Preferably, the optical transmission component also includes a chip array and a first-stage lens array at the transmitting end arranged between the chip array and the combining Z-Block; a second-stage lens at the transmitting end arranged after the combining Z-Block, and an adjustment ring for connecting and fixing the second-stage lens at the transmitting end and the transmitting optical fiber; the second-stage lens at the transmitting end is used to couple the combined optical signal to the transmitting optical fiber.

[0009] Preferably, the multi-channel optical transmission assembly further comprises a thermoelectric cooler, the chip array and the first-stage lens array at the transmitting end are arranged on the thermoelectric cooler, and the thermoelectric cooler regulates the temperature of the chip array.

[0010] Preferably, the optical receiving assembly further includes a collimating lens arranged between the receiving optical fiber and the wave splitting Z-Block; a receiving end lens array arranged after the wave splitting Z-Block; and a photodiode array mounted on the printed circuit board.

[0011] Preferably, the fiber coiling rack has a first surface and a second surface relative to each other; the second surface of the fiber coiling rack is provided with a first optical component slot and a second optical component slot for accommodating or aligning the optical transmitting component and the optical receiving component respectively; the first surface of the fiber coiling rack is provided with an arc-shaped fiber coiling channel and at least one fiber coiling structure.

[0012] Preferably, the arcuate fiber coiling channel and the fiber coiling structure cooperate to form a first limiting structure, and the first limiting structure is used to coil and limit the transmitting optical fiber led out from the first optical component slot of the second surface and reaching the first surface.

[0013] Preferably, a guide channel is also provided on the second surface of the fiber spool; the guide channel constitutes a part of the second limiting structure, and the second limiting structure is used to guide and limit the receiving optical fiber led out from the second optical component slot on the second surface, and guide the receiving optical fiber to be directly led out.

[0014] Preferably, the optical engine with a multi-channel optical transceiver assembly also includes a limiter, which cooperates with the first surface of the fiber coiling rack, and has a limit block facing the arcuate fiber coiling channel, which is used to limit the transmitting optical fiber coiled in the arcuate fiber coiling channel from escaping upward.

[0015] Preferably, the optical transmitting component adopts a BOX packaging structure, including a BOX tube shell and a thermoelectric cooler installed in the BOX tube shell; or the optical receiving component adopts an integrated packaging structure, including an RX component substrate installed on the printed circuit board, and the receiving optical fiber, collimating lens, wave splitting Z-Block, receiving end lens array and prism are arranged on the RX component substrate.

[0016] The present invention also discloses an optical module, comprising an optical module housing, the optical module housing comprising an optical module base and an optical module cover; and an optical engine with a multi-channel optical transceiver component, the optical engine with the multi-channel optical transceiver component being arranged in the optical module housing; wherein the fiber tray of the optical engine with the multi-channel optical transceiver component is fixed to the printed circuit board and / or the optical module base through its supporting portion.

[0017] The beneficial effects of the present invention are as follows: First, the present invention adopts a technical solution based on EML and free-space optics Z-Block to realize the combination and demultiplexing of optical signals. Compared with the traditional AWG solution, it can achieve lower insertion loss, higher channel isolation and stability, and better channel consistency, which is crucial for meeting the stringent requirements of high-speed (such as 400G / 800G and above) and long-distance data center interconnection applications on optical transmission performance.

[0018] Furthermore, in response to the internal fiber management difficulties brought about by the miniaturization of optical modules, the present invention innovatively designs an integrated optical engine with multi-channel optical transceiver components. This structure cleverly utilizes the two surfaces of the fiber optic rack: the second surface is provided with optical component slots for accommodating and aligning optical transmitting and receiving components, which plays a physical protective role; while the first surface is provided with a special arc-shaped fiber optic channel and fiber optic structure for redundant length management with a controlled bending radius for optical fibers that need to be coiled, effectively releasing stress and avoiding the reliability risks of direct wiring. At the same time, the structure also provides an independent, non-coiled guide channel for optical fibers that do not need to be coiled, thereby realizing orderly and separate management of different optical fiber paths and avoiding cross-entanglement and interference. In conjunction with the use of a limiter, it can better ensure that the coiled optical fiber is reliably fixed in the channel.

[0019] Furthermore, the optical engine with multi-channel optical transceiver components of the present invention serves more than just a fiber manager; it also cleverly assumes the function of a separate cover plate in traditional solutions. When the fiber tray is mounted on a PCB, its second surface and its slotted structure directly overlie the optical transmitting and receiving components. By cooperating with the PCB or optical module base (e.g., using supports and sealant), it effectively protects and seals the underlying optical components. This reduces the number of separate covers and seals, optimizes internal module space utilization, simplifies assembly, reduces costs, and enhances the overall compactness and environmental adaptability of the structure.

[0020] Furthermore, the present invention designs a fiber winding rack having a first surface and a second surface relative to each other, and sets the optical component slot on the second surface, while setting the main arc-shaped fiber winding channel on the first surface. This layout cleverly utilizes space and realizes the effective separation of the optical component installation area and the optical fiber winding area. The first optical fiber led out from the second surface and reaching the first surface is coiled by the first limiting structure and reliably fixed by the limiter, which effectively solves the redundant management and bending radius control problems of long optical fibers and avoids stress damage; at the same time, the second optical fiber led out from another optical component on the second surface is guided and limited in a non-coiling manner by the second limiting structure, meeting the management requirements of different optical fiber paths. This not only realizes the orderly and reliable management of different optical fibers and prevents cross-interference and damage between optical fibers, but also provides preliminary positioning and protection for the optical components through the slot design, laying the foundation for subsequent assembly.

[0021] Furthermore, the present invention further stipulates that the limiter is fixed to the first surface of the fiber optic rack by means of a specific fixing column and fixing hole. This design ensures that the installation of the limiter is firm and reliable, thereby ensuring the continued effectiveness of limiting the top of the first optical fiber, preventing the optical fiber from accidentally escaping the channel, and improving the stability of the structure and the reliability of assembly.

[0022] Furthermore, the present invention clearly stipulates that the bending radius of the arc-shaped fiber coiling channel arranged on the first surface is greater than the minimum bending radius of the optical fiber. This is the key to achieving high-reliability fiber coiling, directly ensuring the transmission performance of the coiled optical fiber, avoiding the risk of increased signal loss or physical damage caused by excessive bending, and significantly improving the signal transmission quality and long-term working reliability of the optical module.

[0023] Furthermore, the present invention emphasizes the protective function of the optical component slots arranged on the second surface. After the fiber tray is installed, these slot structures can physically shield and protect the optical components accommodated or aligned, preventing them from being accidentally touched or damaged during subsequent assembly processes or module operation, further enhancing the protection effect on core optical devices.

[0024] Furthermore, the present invention proposes a method of fixing the fiber optic rack support part to the PCB board or the optical module base through sealant, which not only achieves the stable installation of the fiber optic rack itself and prevents it from displacement during use, but more importantly, uses sealant to fill the gap at the joint, thereby effectively sealing the optical component area covered by the second surface of the fiber optic rack, preventing the invasion of external pollutants such as dust and moisture, and improving the environmental adaptability and overall sealing level of the optical module.

[0025] Furthermore, the present invention clarifies that the first limiting structure can support the first optical fiber to be coiled at least one circle in the arc-shaped fiber winding channel on the first surface, which gives the structure the ability to manage longer redundant optical fibers, enhances the design flexibility, and can adapt to a wider range of optical fiber length requirements, ensuring effective stress release and reliable fixation even when the optical fiber margin is large.

[0026] Furthermore, the present invention provides a more flexible design variant. By adding a fiber coiling structure and a branch channel to the first surface, the second optical fiber that was originally non-coiled can also be guided from the second surface to the first surface for coiling as needed, which greatly enhances the adaptability of the fiber coiling rack to different internal wiring requirements. Both optical fibers can be coiled or directly connected as needed, thereby improving the versatility of the design.

[0027] Furthermore, the present invention integrates the aforementioned fiber-coiling structure into the optical engine. By precisely mounting the fiber-coiling frame on the substrate containing the PCB and optical components, the slots on the second surface of the frame align with the optical components. The first and second surface retaining structures act on the corresponding optical fibers, respectively. This creates a compact, functionally integrated, and reliable optical path management optical engine subsystem. This not only ensures effective fiber management but also facilitates modular production and testing of optical engines, optimizing the overall optical module manufacturing process.

[0028] Furthermore, at the optical engine level, this invention emphasizes the dual functionality of the fiber tray, secured with sealant: while simultaneously managing the optical fibers, its secondary surface and slotted structure, combined with the sealant, effectively seal and protect the underlying optical components. This integrated design reduces the number of separate covers and seals, optimizing space utilization within the optical engine and reducing costs and assembly complexity.

[0029] Ultimately, the present invention integrates the optical engine, including the optimized design, into the optical module housing, forming a complete optical module product. Therefore, the technical effects achieved by the present invention are progressive, from the underlying fiber-coiling structure design that ensures the reliable management and protection of individual optical fibers, to the integration, miniaturization, sealing protection, and assembly optimization of the optical engine. Ultimately, the entire optical module product boasts higher reliability, better space utilization, a simplified assembly process, and improved environmental adaptability, meeting the development needs of miniaturized and highly reliable high-speed optical modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 A front view of a light engine with a multi-channel optical transceiver assembly provided by an embodiment of the present invention; Figure 2 A magnified view of an optical engine with a multi-channel optical transceiver assembly provided by an embodiment of the present invention; Figure 3 An exploded view of an optical engine with a multi-channel optical transceiver assembly provided by an embodiment of the present invention; Figure 4 A first view of a fiber coil rack provided by an embodiment of the present invention; Figure 5 A second view of a fiber coil rack provided in an embodiment of the present invention; Figure 6 A top view of a fiber coil rack provided in an embodiment of the present invention; Figure 7 A schematic diagram of another fiber tray provided by an embodiment of the present invention; Figure 8 A schematic diagram of an optical module provided in an embodiment of the present invention; In the accompanying drawings: 100 - fiber tray; 101 - through hole; 102 - curved fiber channel; 103 - fiber coil structure; 104 - stopper fixing column; 105 - first positioning block; 106 - second positioning block; 107 - guide channel; 108 - third positioning block; 109 - fourth positioning block; 110 - second optical component slot; 111 - first optical component slot; 112 - first supporting portion; 113 - second supporting portion; 114 - third supporting portion; 115 - fourth supporting portion; 116 - curved fiber channel branch; 117 - second fiber coil structure; 118 - third fiber coil structure; 200 - stopper; 201 - stopper fixing hole; 202 - stopper; 300 - optical engine; 310-Multi-channel optical transmitter assembly; 311-COC array; 312-Transmitter first-stage lens array; 313-Combiner Z-Block; 314-BOX tube shell; 315-Transmitter second-stage lens; 316-Adjustment ring; 317-Transmitter optical fiber; 318-Thermoelectric cooler; 320-Multi-channel optical receiver assembly; 321-Optical receiver assembly substrate; 322-Receiving optical fiber; 323-Collimating lens; 324-Wavelength demultiplexing Z-Block; 325-Receiving end lens array; 326-Prism; 327-PD array; 328-TIA array; 330-Gasket; 340-Printed circuit board; 400-Optical module base; 500-Optical module cover. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that, in the description of the present invention, the terms "upper", "lower", "inner", "outer", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example 1 This embodiment provides an optical engine with a multi-channel optical transceiver assembly, which aims to improve optical performance by using a solution based on EML and Z-Block free space optics, and optimize internal space utilization and fiber management through an integrated fiber coil structure, thereby improving reliability and assembly efficiency. Figure 1-4 , which shows the overall schematic diagram of the optical engine with a multi-channel optical transceiver component of this embodiment, the layout of its multi-channel optical transmitting component 310 and multi-channel optical receiving component 320, and the decomposition and assembly schematic diagram of the optical engine 300 with a fiber tray 100 and a limiter 200.

[0034] The multi-channel optical transmitter assembly 310 of this embodiment utilizes a BOX package structure and is mounted on a printed circuit board 340. Its primary function is to convert four high-speed electrical signals into a combined optical signal that complies with the CWDM4 wavelength standard and couples it to the transmitting optical fiber 317. Its structure and operation are as follows: A thermoelectric cooler 318 is mounted on the bottom substrate of the BOX housing 314. Above the thermoelectric cooler 318 is a COC array 311 containing four EML chips, one corresponding to each of the four center wavelengths of CWDM4. The thermoelectric cooler 318 precisely controls the operating temperature of the laser to ensure stable wavelength and optical power output. A transmitting-end first-stage lens array 312 is mounted in front of the COC array 311 in the direction of light output. This lens array comprises four microlenses, one corresponding to each of the four laser light output points in the COC array 311, and is used to collimate the diverging laser beam. This lens array is typically mounted on the thermoelectric cooler 318 or on a bracket secured to the BOX housing 314. After being collimated by the first-stage lens array 312 at the transmitter, four parallel light beams of different wavelengths are incident on the combiner Z-Block 313 mounted on the substrate of the BOX housing 314. This combiner Z-Block 313 contains a series of precisely arranged thin-film filters and reflectors. Leveraging the free-space optical path and the wavelength-selective properties of the filters, it combines the four light beams into a single, coaxially transmitted combined beam. The height of the combiner Z-Block 313 can be precisely adjusted using a spacer 330 below it. After exiting the combiner Z-Block 313, the combined light beams enter the second-stage lens 315 at the transmitter, fixed to the light outlet of the BOX housing 314. This lens 315 focuses the collimated combined light beams. The end face of the transmitting optical fiber 317 is positioned at the focal point of the second-stage lens 315. The adjustment ring 316 precisely aligns the lens 315 and the transmitting optical fiber 317, achieving efficient optical coupling. An optical isolator is usually integrated inside the transmitting optical fiber 317 to prevent reflected light from the optical fiber end face or the link from returning to the laser and interfering with its normal operation.

[0035] The multi-channel optical receiving assembly 320 of this embodiment utilizes an integrated on-board package structure and is fixed to a printed circuit board 340. Its primary function is to demultiplex the combined optical signal input from the receiving optical fiber 322 and couple the four separated optical signals to the PD array 327 for conversion into electrical signals. Its structure and operation are as follows: The pigtail end of the receiving optical fiber 322 is fixedly mounted on the optical receiving assembly substrate 321. The combined optical signal emitted from the optical fiber enters the collimating lens 323, which is immediately mounted on the optical receiving assembly substrate 321, and is collimated into a parallel beam. The collimated combined optical beam is then incident on the demultiplexing Z-Block 324, which is mounted on the optical receiving assembly substrate 321. Similar to the demultiplexing Z-Block, the demultiplexing Z-Block 324 utilizes its internal free-space optical path and filters to separate the combined optical beam into four spatially parallel but spaced beams of different wavelengths based on wavelength. The four separated parallel light beams emitted from the demultiplexer Z-Block 324 enter the receiving-end lens array 325 mounted on the optical receiving assembly substrate 321. The receiving-end lens array 325 contains four microlenses, each focusing the corresponding light beam. The four focused light beams are then incident on the prism 326 mounted on the optical receiving assembly substrate 321. The function of the prism 326 is to deflect the horizontally transmitted light path so that it is directed vertically downward. Below the prism 326, on the printed circuit board 340, are mounted a PD array 327 and a TIA array 328. The deflected focused light spot falls precisely on the corresponding photosensitive surface on the PD array 327, achieving photoelectric conversion. The weak current signal generated by the PD array 327 is then amplified by the TIA array 328 into a processable voltage signal. The optical receiving assembly substrate 321 is mounted entirely on the printed circuit board 340, ensuring precise alignment between the bottom of the prism 326 and the PD array 327.

[0036] To manage the transmitting optical fiber 317 from the multi-channel optical transmitter assembly 310 and the receiving optical fiber 322 from the multi-channel optical receiver assembly 320, this embodiment utilizes an integrated fiber coiling structure comprising a fiber coiling frame 100 and a stopper 200. The fiber coiling frame 100 is mounted on a printed circuit board 340. The slot structure beneath it (referred to as the second optical component slot 110 and the first optical component slot 111) aligns with and covers portions of the multi-channel optical transmitter assembly 310 and the multi-channel optical receiver assembly 320, providing a degree of physical protection and auxiliary sealing. After exiting the multi-channel optical transmitter assembly 310, the transmitting optical fiber 317 is guided to the first surface of the fiber coiling frame 100 and into the pre-defined curved fiber coiling channel 102. The optical fiber is coiled around the fiber coiling structure 103 within the channel to accommodate its excess length and ensure that its bend radius exceeds the minimum allowable value. After exiting the multi-channel optical receiving assembly 320, the receiving optical fiber 322 is guided into the guide channel 107 on the fiber spooling rack 100. Typically, it is not coiled and is directed along a predetermined path toward the optical module interface. After the optical fiber routing is complete, the stopper 200 is installed on the first surface of the fiber spooling rack 100. The stopper 202 on the stopper 200 presses against the transmitting optical fiber 317 in the curved fiber spooling channel 102 to prevent it from jumping out. The fiber spooling rack 100 may also have a through hole 101 for subsequent glue sealing to enhance fixation and environmental protection.

[0037] The multi-channel optical transmitter assembly 310, multi-channel optical receiver assembly 320, and fiber-coil structure of the present invention together constitute an optical engine 300. Once assembled, the optical engine 300 can be placed within an optical module housing, such as a QSFP-DD, OSFP, or CFP8 package. Together with the module's other circuits and interfaces, it forms a complete high-speed optical module. This embodiment boasts a compact design, excellent performance, and easy assembly, making it particularly suitable for data center optical interconnect scenarios where size, performance, and reliability are paramount.

[0038] Example 2 This embodiment provides an optical engine with a multi-channel optical transceiver component and its application, aiming to solve the problem that bare optical fiber layout in high-speed, miniaturized optical modules is susceptible to stress and reliability risks, while optimizing the internal space utilization and assembly process of the module. Figures 4 to 7 The optical engine with a multi-channel optical transceiver assembly primarily comprises a fiber tray 100 and a matching stopper 200. This structure is particularly suitable for integration into an optical engine 300 and ultimately assembled into an optical module housing, which comprises an optical module base 400 and an optical module cover 500.

[0039] The fiber tray 100 is a key functional integrated component, usually made of engineering plastics with good mechanical strength, dimensional stability, insulation and easy precision molding, such as PBT, LCP, etc., and is integrally molded through processes such as injection molding. The fiber tray 100 has a relative first surface, usually referring to the upper surface facing the optical module cover, and a second surface, usually referring to the lower surface facing the printed circuit board 340 and optical components below. The fiber tray 100 is provided with a plurality of support parts, such as the first support part 112, the second support part 113, the third support part 114 and the fourth support part 115 as shown in the figure. These support parts play a key supporting and positioning role when the fiber tray 100 is installed. Specifically, the bottom surfaces of the first support part 112 and the third support part 114 are designed to fit tightly with the surface of the printed circuit board 340 in the optical engine 300. At the same time, the side surfaces or specific structures of the first and second support portions 112 and 113 are designed to mate with the sidewalls or specific features of the BOX housing 314 of the multi-channel optical transmitter assembly 310 (typically a TOSA or a component containing a combiner). This mating relationship effectively prevents undesirable relative displacement of the fiber spooling frame 100 relative to the multi-channel optical transmitter assembly 310 and printed circuit board 340 during fiber spooling and subsequent glue dispensing operations, providing a reliable reference for precise fiber routing and subsequent fixation. The fourth support portion 115 is designed to mate with the inner surface or specific structure of the optical module base 400, further enhancing the installation stability of the fiber spooling frame within the entire module. This multi-point, multi-directional support and positioning design ensures the precise positioning of the fiber spooling frame in three-dimensional space.

[0040] The second surface of the fiber tray 100 is recessed to form at least two optical component slots: a first optical component slot 111 and a second optical component slot 110. The shape, size and position of these two slots are precisely designed to respectively accommodate or precisely align the multi-channel optical transmitting component 310 and the multi-channel optical receiving component 320 in the optical engine 300, which are generally optical receiving components ROSA or components including a wavelength splitter. Figure 3As shown, when the fiber tray 100 is installed, the main body of the multi-channel optical transmitter assembly 310 is accommodated in the corresponding space below the first optical component slot 111, and the main body of the multi-channel optical receiver assembly 320 is accommodated in the corresponding space below the second optical component slot 110. These slot structures not only guide the fiber tray during installation, but more importantly, after the fiber tray is secured, the slot walls, particularly the top, i.e., the second surface of the fiber tray itself, act as a cover, providing effective physical protection for the fragile optical components below, preventing accidental mechanical damage, scratches, or contamination during subsequent fiber coiling, gluing, assembly, and even module use. In this embodiment, a physical partition wall may exist between the two slots, the first optical component slot 111 and the second optical component slot 110. This closed partition wall can further enhance the isolation between the two optical components and reduce potential optical or electromagnetic crosstalk. If the partition wall is open, it can be considered a larger slot.

[0041] The first surface of the fiber spooling rack 100 is the core area for fiber spooling. This surface features a curved fiber spooling channel 102, a pre-defined, grooved channel with a large bend radius. Its carefully designed path, typically in the shape of an arc or quasi-arc, guides and accommodates the redundant length of the transmitting optical fiber 317 that needs to be spooled. Crucially, the bend radius of the curved fiber spooling channel 102 at all locations is designed to be significantly greater than the minimum bend radius allowed for bare optical fiber, ensuring that excessive bending during spooling does not lead to significant additional losses or long-term reliability issues. The channel's depth and width are also appropriate. Furthermore, one or more fiber spooling structures 103 are positioned near the central area surrounded by the curved fiber spooling channel 102. These serve as an inner reference for fiber spooling and, together with the outer walls of the curved fiber spooling channel 102, define the fiber's bending path and radius. The optical fiber is wound around the fiber spooling structures 103. A plurality of positioning blocks are provided near the entrance and exit of the curved fiber channel 102 and key turning points in the path, such as the first positioning block 105 and the second positioning block 106 shown in the figure. These positioning blocks are used to accurately guide the optical fiber into and out of the channel, or to regulate the path outside the channel. For example, after the transmitting optical fiber 317 is led out from the second surface and reaches the first surface, it may first be guided to the entrance of the curved fiber channel 102 by the second positioning block 106, and then guided out of the channel by the first positioning block 105 after being coiled. In addition, one or more limiter fixing posts 104 are provided on the first surface of the fiber coiling rack 100 to cooperate with the limiter fixing hole 201 on the limiter 200 to achieve precise positioning and stable installation of the limiter 200 on the fiber coiling rack 100.

[0042] For optical fibers that do not require coiling, such as the receiving optical fiber 322 in this embodiment, the fiber tray 100 also provides corresponding guiding and limiting structures. This includes a guide channel 107, which may be a relatively short, straight channel or path area with only simple bends, located on the fiber tray 100. Its primary function is to guide the receiving optical fiber 322, after exiting the second optical component slot 110, along a predetermined, non-coiled path to its connection destination, such as an adapter. Additional positioning blocks, such as a third positioning block 108 and a fourth positioning block 109, may also be located near the guide channel 107 or along the path of the receiving optical fiber 322. These positioning blocks are used to constrain the path of the receiving optical fiber 322 and prevent it from interfering with the transmitting optical fiber 317 or other components. According to the claims, the third positioning block 108 and the fourth positioning block 109 participate in the second limiting structure to guide the path of the receiving optical fiber 322. For example, the path of the receiving optical fiber 322 may be: exiting the second optical component slot 110, directly through the guide channel 107, and then exiting to the receiving optical fiber 322. The fiber tray 100 may also be provided with one or more through holes 101. The through holes 101 are used to complete the final sealing after assembly, which can be completed by dispensing glue or applying tape, so as to firmly fix the fiber tray 100 on the light engine 300 and form a seal for the optical component area below.

[0043] The stopper 200 is also usually a small component made of injection-molded engineering plastic. Its structure mainly includes one or more stopper fixing holes 201 set on the main body of the stopper 200, whose position and size are precisely matched with the stopper fixing column 104 on the fiber coiling rack 100, and through the cooperation, the stopper 200 can be quickly and accurately positioned and installed on the first surface of the fiber coiling rack 100. The side of the stopper 200 facing the fiber coiling rack 100 is provided with a raised structure, called a limit block 202. When the stopper 200 is installed in place, these limit blocks 202 are located just above the coiled transmitting optical fiber 317 in the arc-shaped fiber coiling channel 102, limiting the space for the optical fiber to move upward and keeping it stably in the channel.

[0044] The optical engine 300 is the core subsystem of the optical module. In this embodiment, it primarily comprises a printed circuit board 340, a multi-channel optical transmitter assembly 310, and a multi-channel optical receiver assembly 320. These components are fixedly mounted side by side on the printed circuit board 340 and electrically connected to it. The multi-channel optical transmitter assembly 310 leads to a transmitting optical fiber 317, while the multi-channel optical receiver assembly 320 leads to a receiving optical fiber 322. Each transmitting optical fiber 317 and receiving optical fiber 322 are typically connected to an adapter at their respective ends.

[0045] The installation and fiber routing process of the fiber spooling structure on the optical engine is roughly as follows: First, place the fiber spooling frame 100 onto the printed circuit board 340, which already has the multi-channel optical transmitter 310 and multi-channel optical receiver 320 installed. Carefully align the spooling frame 100 to ensure that the first optical component slot 111 and the second optical component slot 110 respectively cover the corresponding optical components, and that each support is in good contact with the printed circuit board 340 or the optical component housing. The fiber spooling frame 100 is bonded to the PCB using glue dispensed from the outside. Through-holes 101 serve as the final seal after assembly, which can be achieved by dispensing glue or applying tape. This securely secures the fiber spooling frame 100 to the optical engine 300 and seals the optical component area below. Next, the transmitting optical fiber 317 is routed, leading it from the second surface to the first surface. It is then guided into the curved fiber channel 102 using the second positioning block 106 and carefully coiled once (or multiple times, as needed) along the curved fiber channel 102 and the fiber coiling structure 103, ensuring the required bend radius. The transmitting optical fiber 317 is then routed out of the channel using the first positioning block 105. Subsequently, the receiving optical fiber 322 is routed and guided and positioned along a non-coiled path toward the adapter at its end using the third and fourth positioning blocks 108, 109, and guide channel 107. After the optical fiber is routed, the stopper 200 is installed on the first surface of the fiber coiling rack 100, with the stopper fixing hole 201 inserted into the stopper fixing post 104. The stopper 202 below securely confines the transmitting optical fiber 317 within the curved fiber channel 102. Finally, additional sealing can be performed as needed.

[0046] The overall assembly process for the optical module is as follows: The optical engine 300, with the fiber coiling structure and optical fiber routing complete, is placed in a predetermined position within the optical module base 400. At this point, the fourth support portion 115 of the fiber coiling rack 100 is aligned with the optical module base 400. A gasket 330 can be used to limit the range of motion of the adapter connecting the transmitting optical fiber 317 and the receiving optical fiber 322. Finally, the optical module cover 500 is closed and secured to the optical module base 400 using screws or other fasteners, completing the assembly of the optical module.

[0047] The beneficial effects of this embodiment are reflected in many aspects. First, through the dedicated arc-shaped fiber winding channel 102 and the limiting structure on the fiber winding rack 100, including the fiber winding structure 103, the first positioning block 105 / the second positioning block 106 and the limiter 200, the orderly winding and reliable fixation of the longer transmitting optical fiber 317 are achieved, the bending radius is guaranteed, the stress is released, and the risk of optical fiber wear and breakage is significantly reduced. At the same time, the receiving optical fiber 322 is managed by the independent guide channel 107 and the third positioning block 108 / the fourth positioning block 109, avoiding cross-entanglement and mutual damage between optical fibers. The slot structure of the fiber winding rack, the first optical component slot 111 and the second optical component slot 110, also provide effective physical protection for the optical component itself, thereby improving the reliability and long-term stability of the optical module as a whole. Secondly, the fiber winding rack 100 not only realizes the core optical fiber management function, but its structural design also enables it to simultaneously assume the protection and sealing functions of the independent optical component cover in the traditional optical module after being fixed, which is achieved by cooperating with the sealant. This multifunctional integrated design reduces the number of parts and optimizes the internal space layout of the optical module. Compared with the solution of independently setting up the fiber coiling structure and optical component cover, it occupies a smaller volume. Finally, the positioning structure on the fiber coiling rack 100 can achieve its precise and reliable positioning with the optical engine, simplifying the installation steps. The optical components are accommodated under the corresponding slots, reducing the risk of accidentally touching the internal optical components during fiber coiling operations. The integrated design reduces the total number of components, shortens assembly time, reduces assembly complexity and potential cumulative tolerances, and improves production efficiency and product consistency.

[0048] Example 3 This embodiment is a variation of Example 1. Its primary difference lies in the fact that the transmitting optical fiber 317 to be coiled has a longer redundant length and needs to be coiled more than once, for example, two or more times, within the curved fiber channel 102 of the fiber tray 100. Structurally, the basic structure of the fiber tray 100 and the retainer 200 is the same as in Example 1. However, to accommodate multiple turns of optical fiber, the depth and / or width of the curved fiber channel 102 may need to be appropriately increased. Furthermore, the design of the retainer 202 of the retainer 200 may require consideration of how to effectively restrain multiple layers of superimposed optical fiber. Regarding assembly differences, when routing the transmitting optical fiber 317, after introducing it into the curved fiber channel 102, it must be carefully wound around the fiber coiling structure 103 the required number of times. Care must be taken to maintain the flatness of the optical fiber during this operation to avoid excessive stress concentration at any intersections or overlaps. After completing the multiple turns of coiling, the optical fiber is then guided out of the channel using the first positioning block 105. The subsequent installation of the retainer 200 and the assembly of the optical engine and optical module are essentially the same as in Example 1. This embodiment inherits all the beneficial effects of Example 1. Its particular advantage is that by supporting multi-turn winding, it can effectively manage and accommodate longer-distance optical fiber redundancy, adapt to scenarios with more complex internal optical path designs of optical modules, longer physical distances between optical devices, or higher requirements for optical fiber stress release, providing greater flexibility in the design of optical modules.

[0049] Example 4 This embodiment provides another variant design of an optical engine with a multi-channel optical transceiver component. Figure 7 Compared with Example 1, the main feature of this embodiment is that the structure of the fiber coiling frame 100 is improved, so that it can not only coil the transmitting optical fiber 317, but also coil the receiving optical fiber 322 as needed, and provide a more flexible winding path selection for the transmitting optical fiber 317. The structural improvement is mainly reflected in the first surface of the fiber coiling frame 100. In addition to the original fiber coiling structure 103 and the curved fiber coiling channel 102, a second fiber coiling structure 117 and a third fiber coiling structure 118 are added. These newly added fiber coiling structures and the original structure together define an curved fiber coiling channel branch 116. This curved fiber coiling channel branch 116 may branch out from the main curved fiber coiling channel 102, or partially overlap with it or run parallel to it. At the same time, the exit area of ​​the guide channel 107, which was originally used to directly guide the receiving optical fiber 322 to leave, has been modified, for example, by widening it or changing its path, so that it can conveniently guide the receiving optical fiber 322 to the first surface of the fiber coiling frame 100 and connect it to the newly added fiber coiling area.

[0050] During the fiber routing process, the transmitting optical fiber 317 can now be coiled within the main curved fiber channel 102 or directed to the newly added curved fiber channel branch 116 for coiling, depending on its actual length and routing requirements. If coiling is required for the receiving optical fiber 322, its path will differ from that of Example 1. After exiting from below the second optical component slot 110, the receiving optical fiber 322 is guided to the first surface of the fiber coiling rack 100 via the modified guide channel 107. Thereafter, the receiving optical fiber 322 may be guided into the newly added fiber coiling area using positioning blocks or other structures, such as passing through the outer wall of the second positioning block 106 and the first positioning block 105, and then introduced into the curved fiber channel branch 116 adjacent to the third fiber coiling structure 118. The receiving optical fiber 322 is coiled within the curved fiber channel branch 116, possibly merging into the main curved fiber channel 102, before finally exiting from an outlet. The design of the limiter 200 may need to be adjusted to ensure that it can simultaneously cover and effectively limit the coiled optical fibers located in the main arc-shaped fiber winding channel 102 and the arc-shaped fiber winding channel branch 116. This embodiment also inherits the basic advantages of Example 1, and its unique advantage is that it enhances the versatility and adaptability of the design. By providing an optional winding path and supporting the ability to coil a second optical fiber, the same fiber winding rack design can adapt to the needs of more diverse optical module products. In addition, when both optical paths are facing the risk of bare fiber stress, this embodiment can provide a coiling solution for both optical fibers, ensuring that they both meet the minimum bending radius requirements and receive sufficient stress relief, thereby improving the reliability of the entire optical module to a higher level.

[0051] Those skilled in the art can make various modifications, combinations or equivalent substitutions to these specific details based on actual application requirements without departing from the core idea of ​​the present invention and the scope defined by the claims. For example, the partition walls between the optical component slots can be opened or closed; the structure of the positioning blocks can be optimized or increased or decreased; the fiber winding channel can be designed into a more complex path; the shape and contact method of the support portion can be adjusted; the fixing method can also be combined with snap-ons, hot melt, etc. in addition to sealants. In addition, the material selection, manufacturing process, etc. of the fiber winding rack and the limiter can also be adjusted according to cost and performance requirements. All these improvements or deformations based on the spirit of the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light engine with a multi-channel optical transceiver assembly, characterized in that: including a printed circuit board (340); A multi-channel optical transmission component (310) is arranged on the printed circuit board (340), and the multi-channel optical transmission component (310) includes a wave-combining Z-Block (313) for combining optical signals of multiple optical channels; A transmitting optical fiber (317), connected to the multi-channel optical transmitting assembly (310), for outputting the optical signal after the multiplexing process; A multi-channel optical receiving component (320) is arranged on the printed circuit board (340), wherein the multi-channel optical receiving component (320) includes a wave splitting Z-Block (324) for performing wave splitting processing on an input multiplexed optical signal to obtain optical signals of multiple optical channels; A receiving optical fiber (322), connected to the multi-channel optical receiving component (320), and used for inputting the multiplexed optical signal; A fiber coiling frame (100) is provided on the printed circuit board (340) and is used for coiling the transmitting optical fiber (317) and / or the receiving optical fiber (322).

2. The light engine with a multi-channel optical transceiver assembly according to claim 1, characterized in that: The optical transmission component (310) further includes a chip array (311) and a transmitting end first-stage lens array (312) arranged between the chip array (311) and the combining Z-Block (313); a transmitting end second-stage lens (315) arranged after the combining Z-Block (313), and an adjustment ring (316) for connecting and fixing the transmitting end second-stage lens (315) and the transmitting optical fiber (317); the transmitting end second-stage lens (315) is used to couple the combined optical signal to the transmitting optical fiber (317).

3. The light engine with a multi-channel optical transceiver assembly according to claim 2, characterized in that: The multi-channel optical transmission component (310) further includes a thermoelectric cooler (318), the chip array (311) and the transmitting end first-stage lens array (312) are arranged on the thermoelectric cooler (318), and the thermoelectric cooler (318) regulates the temperature of the chip array (311).

4. The light engine with a multi-channel optical transceiver assembly according to claim 1, characterized in that: The optical receiving assembly (320) further includes a collimating lens (323) disposed between the receiving optical fiber (322) and the wave splitting Z-Block (324); a receiving end lens array (325) disposed after the wave splitting Z-Block (324); and a photodiode array (327) mounted on the printed circuit board (340).

5. The light engine with a multi-channel optical transceiver assembly according to claim 4, characterized in that: The fiber coiling rack (100) has a first surface and a second surface opposite to each other; a first optical component slot (111) and a second optical component slot (110) for accommodating or aligning the optical transmitting component (310) and the optical receiving component (320) are provided on the second surface of the fiber coiling rack (100); and an arc-shaped fiber coiling channel (102) and at least one fiber coiling structure (103) are provided on the first surface of the fiber coiling rack (100).

6. The light engine with a multi-channel optical transceiver assembly according to claim 5, characterized in that: The arc-shaped fiber coiling channel (102) and the fiber coiling structure (103) cooperate to form a first limiting structure, and the first limiting structure is used to coil and limit the transmitting optical fiber (317) that is led out from the first optical component slot (111) of the second surface and reaches the first surface.

7. The light engine with a multi-channel optical transceiver assembly according to claim 5, characterized in that: A guide channel (107) is also provided on the second surface of the fiber coil rack (100); the guide channel (107) constitutes a part of a second limiting structure, and the second limiting structure is used to guide and limit the receiving optical fiber (322) led out from the second optical component slot (110) of the second surface, so as to guide the receiving optical fiber (322) to be directly led out.

8. The light engine with a multi-channel optical transceiver assembly according to claim 6, characterized in that: The optical engine with a multi-channel optical transceiver assembly further comprises a stopper (200), wherein the stopper (200) cooperates with the first surface of the fiber coiling frame (100), and the stopper (200) has a stopper block (202) facing the arcuate fiber coiling channel (102), and is used to limit the emitting optical fiber (317) coiled in the arcuate fiber coiling channel (102) from escaping upward.

9. The light engine with a multi-channel optical transceiver assembly according to claim 1, characterized in that: The optical transmitting component (310) adopts a BOX packaging structure, including a BOX tube shell (314) and a thermoelectric cooler (318) installed in the BOX tube shell (314); or the optical receiving component (320) adopts an integrated packaging structure, including an RX component substrate (321) installed on the printed circuit board (340), and the receiving optical fiber (322), the collimating lens (323), the wave splitting Z-Block (324), the receiving end lens array (325) and the prism (326) are arranged on the RX component substrate (321).

10. An optical module, characterized in that: It comprises an optical module housing, wherein the optical module housing comprises an optical module base (400) and an optical module cover plate (500); And an optical engine with a multi-channel optical transceiver assembly as claimed in any one of claims 1 to 9, wherein the optical engine with a multi-channel optical transceiver assembly is arranged in the optical module housing; wherein the fiber tray (100) of the optical engine with a multi-channel optical transceiver assembly is fixed to the printed circuit board (340) and / or the optical module base (400) through its supporting portion.

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