Optical receiver modules, optical devices and optical communication equipment

Abstract

This disclosure provides an optical receiving module, an optical device, and an optical communication equipment, belonging to the field of optical communication technology. The optical receiving module includes: a first housing, a first optical receiving unit, a second optical receiving unit, and a beam splitter assembly; the beam splitter assembly is located within the first housing and includes a first beam splitter block, a first waveplate, and a second waveplate; the first beam splitter block includes a first optical processing surface, a second optical processing surface, a third optical processing surface, and a fourth optical processing surface; the first optical processing surface is located on one side of the first beam splitter block along a second direction, and the second and third optical processing surfaces are located on the other side of the first beam splitter block along the second direction; the first waveplate is mounted on the second optical processing surface, and the second waveplate is mounted on the first optical processing surface. The optical receiving module provided by this disclosure helps to reduce the overall size of the optical receiving module, lower the production and processing costs of the optical receiving module, and achieve low-cost and miniaturized design of the optical device.

Description

Technical Field

[0001] This disclosure relates to the field of optical communication technology, and particularly to optical receiving modules, optical devices, and optical communication equipment. Background Technology

[0002] With the development of new business and application models such as cloud computing, mobile internet, and video, the advancement of optical communication technology has become increasingly important. In optical communication technology, optical devices are the tools for converting photoelectric signals to each other, and are one of the key components in optical communication equipment. Furthermore, with the evolving needs of optical communication technology, the transmission rates of optical devices are continuously increasing.

[0003] In related technologies, in order to meet the needs of scenarios where multiple generations of PON coexist, such as G PON (Gbit / s passive optical network), 10G PON (10Gbit / s PON), and 50G PON, optical devices supporting multiple PON protocols have emerged. However, these optical devices generally have complex structures, large sizes, and cannot achieve low cost and miniaturization. Summary of the Invention

[0004] This disclosure provides an optical receiving module, an optical device, and an optical communication equipment, which can solve the technical problems in related technologies where optical devices have complex structures, large sizes, and cannot achieve low cost and miniaturization.

[0005] Specifically, the technical solution is as follows.

[0006] On the one hand, an optical receiving module is provided, the optical receiving module comprising: a first housing, a first optical receiving unit, a second optical receiving unit, and a beam splitting component;

[0007] The first optical receiving unit and the second optical receiving unit are respectively located on opposite sides of the first housing along a first direction; the beam splitting component is located inside the first housing, and the beam splitting component includes a first beam splitting block, a first waveplate, and a second waveplate;

[0008] The first beam splitter includes a first light processing surface, a second light processing surface, a third light processing surface, and a fourth light processing surface;

[0009] The first light processing surface is located on one side of the first beam splitter along the second direction, and the second light processing surface and the third light processing surface are located on the other side of the first beam splitter along the second direction; the first waveplate is mounted on the second light processing surface, and the second waveplate is mounted on the first light processing surface, wherein the second direction and the first direction are perpendicular to each other.

[0010] The solution disclosed herein has a built-in optical receiving module with a beam splitter component. This beam splitter component can be used to achieve multi-path beam splitting processing, meet the optical signal reception requirements of various different modes, and enable the optical device to support multiple PON protocols, thus meeting the requirements of scenarios where multiple PON protocols coexist.

[0011] Moreover, the beam splitter includes a first beam splitter block with four light processing surfaces, and a first waveplate and a second waveplate mounted on the first beam splitter block. Different light processing surfaces have different light processing effects. With a smaller number of waveplates, light can be filtered, refracted, reflected, or transmitted according to different wavelengths. By utilizing the folded arrangement of the light path within the first beam splitter block, the transmission direction of different light rays can be adjusted. The structure of the beam splitter is simpler, reducing the number of light processing elements such as filter elements and lens elements, reducing the geometric optical path of light, which is beneficial to reducing the volume of the beam splitter and thus the overall size of the light receiving module.

[0012] In addition, two waveplates in the beam splitter are mounted on the first beam splitter block, making the beam splitter a whole component. The beam splitter has a high degree of integration. Only by assembling this whole component with the first housing with high precision can the precise positioning of multiple different optical paths be completed. This greatly simplifies the assembly and debugging process of the beam splitter, thereby helping to reduce the production and processing costs of the optical receiving module and realizing the low-cost and miniaturized design of optical devices.

[0013] In some possible implementations, the first housing is provided with a first connection end and a second connection end on opposite sides along the second direction. The first connection end is used to connect to the optical emitting module, and the optical emitting module can transmit side-light signals to the optical receiving module through the first connection end. The second connection end is used to connect to the optical fiber connection module, and the optical fiber connection module can input receiving side-light signals to the optical receiving module through the second connection end, and can also receive transmitting side-light signals transmitted from the optical receiving module.

[0014] The optical transmitting module, the optical receiving module, and the optical fiber connection module are connected to each other to form a complete optical device with optical transmitting and receiving functions.

[0015] For example, the optical emitting module may or may not be a packaged integrated element.

[0016] In another example, the first optical receiving unit, the second optical receiving unit, and the beam splitting component are respectively encapsulated within the first housing.

[0017] In some possible implementations, the first light processing surface, the second light processing surface, and the third light processing surface are respectively arranged at an angle relative to the second direction, and the angle of inclination of the third light processing surface relative to the second direction is greater than the angles of inclination of the first light processing surface and the second light processing surface relative to the second direction.

[0018] With the above arrangement, the light transmitted along the second direction can be obliquely irradiated onto the first light processing surface and the second light processing surface. The first light processing surface can transmit, reflect or refract the light, while the third light processing surface has a larger tilt angle, which can increase the reflection angle of the light, so that the light irradiated onto the third light processing surface has a larger emission range, thus meeting the position requirements of the second light receiving unit.

[0019] In some possible implementations, the tilt angle α of the first light-processing surface relative to the first direction ranges from 8° to 13.5°.

[0020] And / or,

[0021] The tilt angle β of the second light-processed surface relative to the first direction ranges from 8° to 13.5°.

[0022] In this embodiment, when the tilt angles of the first and second optical processing surfaces respectively meet the aforementioned value ranges, the beam splitter can perform beam splitting processing on optical signals within the wavelength ranges corresponding to G PON, 10G PON, and 50G PON. The setting of this tilt angle mainly considers the narrowest wavelength interval of the received wavelengths and can achieve the transmission of one wavelength and the reflection of the other two wavelengths.

[0023] For example, the tilt angle α of the first light-processing surface is equal to the tilt angle β of the second light-processing surface, that is, the first light-processing surface and the second light-processing surface are parallel to each other.

[0024] In some possible implementations, the wavelength range of the optical signal of 50G PON (1284nm-1288nm) can be defined as the first wavelength range, and the wavelength range of the optical signal of 10G PON (1300nm-1330nm) and 10G PON (1260nm-1280nm) can be defined as the second wavelength range. That is, the optical signal on the receiving side may contain optical signals of the first wavelength range and the second wavelength range.

[0025] In some possible implementations, the optical receiving module has three optical paths: one between the first connection end and the second connection end, one between the second connection end and the first optical receiving unit, and one between the second connection end and the second optical receiving unit.

[0026] The first optical path is used to transmit the transmitting side optical signal emitted by the optical transmitting module toward the optical fiber connection module, while the second and third optical paths are used to transmit the receiving side optical signal input by the optical fiber connection module.

[0027] In some possible implementations, the first beam splitter further includes a fifth light processing surface, which is parallel to the fourth light processing surface;

[0028] The first light-processing surface, the fourth light-processing surface, the second light-processing surface, the third light-processing surface, and the fifth light-processing surface are connected end to end in sequence.

[0029] With the above arrangement, the first beam splitter has five light processing surfaces, all of which can participate in the processing of light, giving the beam splitter more light processing effects and more flexible beam splitting methods. This is beneficial for further optimizing the structure of the light receiving module and achieving miniaturization and low-cost design.

[0030] In some possible implementations, the beam splitter further includes a first optical mirror located in the light-receiving direction of the first light receiving unit, which is used to reflect light to the first light receiving unit.

[0031] By arranging a first optical mirror in the light-receiving direction of the first optical receiving unit, the first optical mirror can be used to reflect the optical signal of the first wavelength range transmitted along the second optical path to the light-receiving direction of the first optical receiving unit, so that the optical signal of the first wavelength range can enter the first optical receiving unit along the light-receiving direction.

[0032] For example, the first optical mirror is located on the refraction path of the second wave plate, which can reflect light signals of the first wavelength range refracted by the second wave plate to the first light receiving unit.

[0033] In some possible implementations, the second waveplate includes a first filter surface, a first reflective surface, and a first light-emitting surface. The first filter surface is attached to the first light processing surface, and light can pass through the first light processing surface and the first filter surface to enter the second waveplate. After being reflected by the first reflective surface, light is emitted from the first light-emitting surface and enters the first light receiving unit.

[0034] By arranging a first filter surface, a first reflective surface, and a first light-emitting surface within the second waveplate, the first filter surface can filter out light outside the first wavelength range, allowing only light signals within the first wavelength range to pass through and enter the second waveplate. The first optical mirror reflects the light signals within the first wavelength range to the first light-emitting surface, which can transmit or refract the light signals within the first wavelength range, enabling the light signals within the first wavelength range to enter the first light receiving unit along the light-incoming direction.

[0035] For example, an optical signal in the first wavelength range transmitted along the second optical path can pass through the first optical processing surface and the first filter surface to enter the second waveplate.

[0036] In some possible implementations, the optical receiving module further includes a third optical receiving unit, which is located on the same side of the first housing along the first direction as the second optical receiving unit;

[0037] The beam splitting assembly further includes a third waveplate and a fourth waveplate. The third waveplate is located at the intersection of the light-receiving direction of the second light receiving unit and the fourth light processing surface, and the fourth waveplate is located at the intersection of the light-receiving direction of the third light receiving unit and the fourth light processing surface.

[0038] With the above arrangement, the optical receiving module can have three optical receiving units, which can respectively receive optical signals of three different wavelength ranges, and the optical receiving module can support the reception of optical signals of three protocols.

[0039] The third optical receiving unit and the second optical receiving unit are arranged on the same side of the first housing along the first direction, which can reduce the difficulty of optical path design of the beam splitter and reduce the geometric optical path.

[0040] The structure of the third waveplate is similar to that of the second waveplate. It has the functions of filtering and transmitting light. It can transmit or refract light signals in a specific wavelength range and reflect light signals in another specific wavelength range. The reflected light is the light signal that the third light receiving unit needs to receive.

[0041] In some possible implementations, the optical receiver module has four optical paths, with the second, third, and fourth optical paths used to transmit the receiving-side optical signals input from the fiber optic connection module.

[0042] In some possible implementations, the third optical receiving unit and the second optical receiving unit are arranged at a distance from each other along the second direction. This arrangement reduces the complexity of the optical path design for the beam splitter and decreases the geometric optical path length.

[0043] In some possible implementations, when the first beam splitter includes a fifth optical processing surface, the fourth and fifth optical processing surfaces are respectively arranged at an angle relative to the second direction. This arrangement reduces the complexity of the optical path design for the beam splitter and decreases the geometric optical path length.

[0044] On the other hand, an optical receiving module is provided, the optical receiving module comprising: a first housing, a first optical receiving unit, a second optical receiving unit, and a beam splitting component;

[0045] The first light receiving unit and the second light receiving unit are respectively located on opposite sides of the first housing along a first direction; the beam splitting assembly is located inside the first housing, and the beam splitting assembly includes a first filter, a second optical mirror, a second beam splitter block, and a third optical mirror;

[0046] The first filter is arranged at an angle, the second optical mirror is located in the light-receiving direction of the first light receiving unit, the third optical mirror is located in the light-receiving direction of the second light receiving unit, and the second beam splitter is located between the first filter and the second optical mirror, or between the first filter and the third optical mirror, or between the second optical mirror and the third optical mirror.

[0047] The solution disclosed herein has a built-in optical receiving module with a beam splitter component. This beam splitter component can be used to achieve multi-path beam splitting processing, meet the optical signal reception requirements of various different modes, and enable the optical device to support multiple PON protocols, thus meeting the requirements of scenarios where multiple PON protocols coexist.

[0048] Furthermore, the beam splitting assembly includes three light processing elements: a first filter, a second optical mirror, and a third optical mirror, as well as a second beam splitter. The second beam splitter can be arranged between any two light processing elements. By utilizing its own light filtering, emission, and / or refraction characteristics, it changes the light transmission direction between the two light processing elements, thereby allowing the positions of the three light processing elements to be optimized and adjusted. For example, by converting direct light into reflected or refracted light, the spacing between two adjacent light processing elements along the first and / or second directions can be reduced, thereby compressing the size of the light receiving module in the first and / or second directions and reducing the overall size of the light receiving module.

[0049] In some possible implementations, the first housing is provided with a first connection end and a second connection end on opposite sides along the second direction. The first connection end is used to connect to the optical emitting module, and the optical emitting module can transmit side-light signals to the optical receiving module through the first connection end. The second connection end is used to connect to the optical fiber connection module, and the optical fiber connection module can input receiving side-light signals to the optical receiving module through the second connection end, and can also receive transmitting side-light signals transmitted from the optical receiving module.

[0050] The optical transmitting module, the optical receiving module, and the optical fiber connection module are connected to each other to form a complete optical device with optical transmitting and receiving functions.

[0051] In some possible implementations, the third optical mirror is located on the reflection path of the first filter, the second beam splitter is located on the reflection path of the third optical mirror, and the second optical mirror is located on the reflection path of the second beam splitter.

[0052] And / or,

[0053] The second optical mirror and the third optical mirror are located on one side of the first filter along the first direction, and the second beam splitter is located on the opposite side of the first filter along the first direction.

[0054] With the above arrangement, the optical path of the beam splitter in the optical receiving module is simple, the geometric optical path is short, and the length of the optical receiving module is small, which is conducive to the miniaturization design of optical devices. The receiving-side optical signal reflected by the first filter first reaches the second beam splitter. The second beam splitter transmits or refracts the optical signal of a specific wavelength range onto the second optical mirror according to the wavelength range, and reflects the optical signal of another specific wavelength range onto the third optical mirror. By splitting the light first and then reflecting it, each reflector only needs to be designed in position and angle according to the specific wavelength range of light, making the structure simpler. Moreover, only one reflector needs to be arranged between the second beam splitter and the two optical receiving units, without the need for other additional optical processing elements. This helps to reduce the spacing between the optical processing elements in the optical receiving module, thereby realizing the miniaturization and low-cost design of the optical receiving module.

[0055] In some possible implementations, the second beam splitter is located on the reflection path of the first filter, the second optical mirror is located on the transmission or refraction path of the second beam splitter, and the third optical mirror is located on the reflection or refraction path of the second beam splitter.

[0056] And / or,

[0057] The second optical mirror and the second beam splitter are located on one side of the first filter along the first direction, and the third optical mirror is located on the other side of the first filter along the first direction.

[0058] With the above arrangement, the receiving light signal reflected by the first filter first reaches the second beam splitter. The second beam splitter transmits or refracts the light signal of a specific wavelength range onto the second optical mirror according to the wavelength range, and reflects the light signal of another specific wavelength range onto the third optical mirror. By splitting the light first and then reflecting it, each reflector only needs to be designed in terms of position and angle according to the specific wavelength range of light, making the structure simpler. Moreover, only one reflector needs to be arranged between the second beam splitter and the two light receiving units, without the need for other additional light processing elements. This helps to reduce the spacing between the light processing elements in the light receiving module, thereby realizing the miniaturization and low-cost design of the light receiving module.

[0059] The optical path of the beam splitter in the optical receiver module is simple, the geometric optical path is short, and the length of the optical receiver module is small, which is conducive to the miniaturization design of optical devices.

[0060] On the other hand, an optical device is provided, the optical device comprising: the optical receiving module described in this disclosure, as well as an optical fiber connection module and an optical transmitting module;

[0061] The optical fiber connection module and the optical emission module are respectively located on opposite sides of the first housing along the second direction, and a first optical path is formed between the optical fiber connection module and the optical emission module;

[0062] There is a second optical path between the optical fiber connection module and the first optical receiving unit, and there is a third optical path between the optical fiber connection module and the second optical receiving unit.

[0063] The solution shown in this embodiment uses the optical receiving module provided in this disclosure and has all the beneficial technical effects of this disclosure. The optical device is a combo device, and the optical receiving module has a built-in beam splitter component. This beam splitter component can be used to realize the beam splitting processing of the first optical path, the second optical path, and the third optical path, so as to meet the optical signal transmission requirements of three different modes. This allows the optical device to support three PON protocols and meet the scenario requirements of the coexistence of the three PON protocols.

[0064] Moreover, in the optical receiving module, the size of the beam splitting component along the first and / or second directions is small, and the material and production costs are low, which realizes the miniaturization and low cost of the optical receiving module, and thus is conducive to the miniaturization and low cost design of optical devices.

[0065] In some possible implementations, the first optical receiving unit and the optical fiber connection module are located on the side of the first optical processing surface, and the second optical receiving unit is located on the side of the fourth optical processing surface.

[0066] With the above arrangement, the length and width of the optical device are relatively small, which is beneficial for the miniaturization and low-cost design of the optical device.

[0067] In some possible implementations, the optical fiber connection module includes an optical fiber component and a first collimating lens, the first collimating lens being located between the optical fiber component and the first light processing surface. The first collimating lens can collimate the light emitted by the optical fiber component into parallel light, improving the transmission efficiency of the optical signal.

[0068] In some possible implementations, the optical emitting module includes a first optical emitting component, a second optical emitting component, and a light combining component;

[0069] The light emission direction of the first light emitting component is parallel to the first direction, the light emission direction of the second light emitting component is parallel to the second direction, and the light combining component is located at the intersection of the light emission directions of the first light emitting component and the light emission direction of the second light emitting component. The light combining component can combine the light emitted by the first light emitting component and the second light emitting component and transmit them along the first optical path.

[0070] With the above arrangement, the optical transmitting module can transmit optical signals of two wavelength ranges using the first optical transmitting component and the second optical transmitting component. This is suitable for situations where the optical transmitting component transmits optical signals of two wavelength ranges, such as in scenarios where 10G PON and 50G PON coexist: the first optical transmitting component transmits the optical signal corresponding to 50G PON, and the second optical transmitting component transmits the optical signal corresponding to 10G PON, or the first optical transmitting component transmits the optical signal corresponding to 10G PON, and the second optical transmitting component transmits the optical signal corresponding to 50G PON; in scenarios where 5G PON and 10G PON coexist: the first optical transmitting component transmits the optical signal corresponding to 10G PON, and the second optical transmitting component transmits the optical signal corresponding to 5G PON, or the first optical transmitting component transmits the optical signal corresponding to 5G PON, and the second optical transmitting component transmits the optical signal corresponding to 10G PON.

[0071] In some possible implementations, the first light emitting component includes a first light emitting unit, a second collimating lens, and an isolator, wherein the second collimating lens and the isolator are sequentially located in the light emission direction of the first light emitting unit; wherein the first light emitting unit is used to emit light signals within a specific wavelength range, the second collimating lens is used to collimate the focusing light emitted by the light emitting unit into parallel light, thereby improving the signal transmission distance and efficiency; and the isolator is used to block the input signal and the output signal.

[0072] The second light emitting assembly includes a second light emitting unit and a third collimating lens, the third collimating lens being located in the light emission direction of the second light emitting unit. The second light reflecting unit is used to emit light signals within a specific wavelength range, and the third collimating lens is used to collimate the focused light emitted by the light emitter into parallel light, improving signal transmission distance and efficiency.

[0073] On the other hand, an optical communication device is provided, which includes the optical receiving module or the optical device described in this disclosure. Attached Figure Description

[0074] Figure 1 This is a schematic diagram of an exemplary optical device and a first optical path disclosed herein;

[0075] Figure 2This is a schematic diagram of an exemplary optical device and a second optical path disclosed herein;

[0076] Figure 3 This is a schematic diagram of an exemplary optical device and a third optical path disclosed herein;

[0077] Figure 4 This is a schematic diagram of the structure of an exemplary first beam splitter of this disclosure;

[0078] Figure 5 This is a schematic diagram of another exemplary optical device and second optical path disclosed herein;

[0079] Figure 6 This is a schematic diagram of another exemplary optical device and the third and fourth optical paths disclosed herein;

[0080] Figure 7 This is a schematic diagram of the structure of another exemplary optical device disclosed herein;

[0081] Figure 8 This is a schematic diagram of the structure of another exemplary optical device disclosed herein;

[0082] Figure 9 This is a schematic diagram of the structure of another exemplary optical device disclosed herein;

[0083] Figure 10 This is a schematic diagram of the networking structure of an exemplary optical communication device disclosed herein.

[0084] The reference numerals in the attached figures represent:

[0085] 0a, First direction; 0b, Second direction;

[0086] 001, First optical path; 002, Second optical path; 003, Third optical path; 004, Fourth optical path;

[0087] 1. Fiber optic connection module;

[0088] 11. Fiber optic component; 12. First collimating lens;

[0089] 2. Optical receiver module;

[0090] 21. First housing; 211. First connecting end; 212. Second connecting end;

[0091] 22. First optical receiving unit;

[0092] 23. Second optical receiving unit;

[0093] 24. Beam splitter assembly; 241. First beam splitter block; 241a. First light processing surface; 241b. Second light processing surface; 241c. Third light processing surface; 241d. Fourth light processing surface; 241e. Fifth light processing surface; 242. First waveplate; 243. Second waveplate; 243a. First filter surface; 243b. First reflecting surface; 243c. First light emitting surface; 244. First optical mirror; 245. Third waveplate; 246. Fourth waveplate; 247. First filter element; 248. Second optical mirror; 249. Second beam splitter block; 2410. Third optical mirror;

[0094] 25. Third optical receiving unit;

[0095] 3. Optical emission module;

[0096] 31. First light emitting component; 311. First light emitting unit; 312. Second collimating lens; 313. Isolator;

[0097] 32. Second light emitting component; 321. Second light emitting unit; 322. Third collimating lens;

[0098] 33. Photosynthesis Components. Detailed Implementation

[0099] In the description of the embodiments of this disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", "length", "width", "thickness", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. The orientation may change when the product is placed in different postures, and therefore should not be construed as a limitation on the embodiments of this disclosure.

[0100] This application relates to optical receiving components, optical transmitting components, optical modules, optical line terminals, and passive optical network systems. The following is a brief explanation of the concepts involved:

[0101] Passive optical network (PON): A passive optical network is an optical distribution network (ODN) between the optical line terminal (OLT) and the optical network unit (ONU), without any active electronic devices.

[0102] ODN is a fiber-to-the-home (FTTH) network based on PON equipment. Its function is to provide an optical transmission channel between the OLT and ONU.

[0103] Wavelength division multiplexing (WDM) is a technique that combines two or more optical carrier signals of different wavelengths (carrying various information) at the transmitting end using a multiplexer (also called a multiplexer) and couples them into the same optical fiber for transmission. At the receiving end, a demultiplexer (also called a demultiplexer) separates the optical carriers of different wavelengths, and then the optical receiver performs further processing to recover the original signal. This technique of simultaneously transmitting two or more different wavelength optical signals in the same optical fiber is called wavelength division multiplexing.

[0104] Optical transmission module: also known as an optical module, it consists of two main parts: a bidirectional optical subassembly (BOSA) and an electronic subassembly (ESA). The optical transceiver is electrically connected to the external electronic subassembly (ESA), and then installed into the optical module housing to form the optical transmission module.

[0105] A bi-directional optical sub-assembly (BOSA) mainly includes a transmitting optical sub-assembly (TOSA) and a receiving optical sub-assembly (ROSA).

[0106] Transmitting optical sub-assembly (TOSA): The function of TOSA is to convert electrical signals into optical signals and input them into optical fibers for transmission.

[0107] Optical receiving sub-assembly (ROSA): The function of ROSA is to receive optical signals transmitted through optical fibers and convert them into electrical signals.

[0108] Optical modules that can simultaneously support multiple different transmission rates can be called combo optical modules. For example, commonly used combo optical modules are compatible with existing G PON network services while providing 10G PON or 50G PON high-bandwidth services on demand. They reuse existing network equipment and ODN, avoiding changes to existing network resources and additional equipment room space occupation. User-side ONU terminals can be replaced as needed according to service package upgrades, enabling rapid and smooth upgrades of high-bandwidth services.

[0109] In recent years, 50G PON has become the path for the evolution of the next generation of PON networks. However, since home users do not have such an urgent need for bandwidth upgrades, G PON and 10G PON systems will need to continue to serve for a long time. Enterprises with high network bandwidth requirements may upgrade to 50G PON systems in the future. In this case, there will be a situation where G PON, 10GPON and 50G PON optical components coexist.

[0110] Regarding the wavelength of optical signals used, optical line terminals in G PON use wavelengths of 1480nm-1500nm for transmission and 1300nm-1330nm for reception; optical line terminals in 10G PON use wavelengths of 1575nm-1580nm for transmission and 1260nm-1280nm for reception; and optical line terminals in 50G PON use wavelengths of 1340nm-1344nm for transmission and 1284nm-1288nm for reception.

[0111] In a combined transceiver unit, it is necessary to receive and transmit optical signals of 10G PON, 10G PON and 50G PON wavelengths. Through a certain structural design, coexistence can be achieved. This requires the use of a series of WDM modules (multiplexers or demultiplexers) to combine and separate the three wavelengths of light.

[0112] Please see Figure 10 , Figure 10 This is a schematic diagram of an exemplary optical communication device network structure. It adopts an external coexistence (CEx) WDM multiplexing method to achieve coexistence with G PON OLT, 10G PON OLT and 50G PON OLT, and uses a beam splitting structure to distribute the three different optical paths to the corresponding ONUs (including G PON ONU, 10G PON ONU and 50G PON ONU).

[0113] On the one hand, please refer to Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides an optical receiving module 2, which includes: a first housing 21, a first optical receiving unit 22, a second optical receiving unit 23, and a beam splitting component 24.

[0114] The first light receiving unit 22 and the second light receiving unit 23 are located on opposite sides of the first housing 21 along the first direction 0a, respectively; the beam splitting assembly 24 is located inside the first housing 21, and the beam splitting assembly 24 includes a first beam splitting block 241, a first wave plate 242 and a second wave plate 243.

[0115] The first beam splitter 241 includes a first light processing surface 241a, a second light processing surface 241b, a third light processing surface 241c, and a fourth light processing surface 241d. The first light processing surface 241a is located on one side of the first beam splitter 241 along the second direction Ob, and the second light processing surface 241b and the third light processing surface 241c are located on the other side of the first beam splitter 241 along the second direction Ob. A first waveplate 242 is mounted on the second light processing surface 241b, and a second waveplate 243 is mounted on the first light processing surface 241a, wherein the second direction Ob and the first direction Oa are perpendicular to each other.

[0116] In the scheme shown in this embodiment, the optical receiving module 2 has a built-in beam splitting component 24. The beam splitting component 24 can be used to realize multi-optical path beam splitting processing, meet the optical signal reception requirements of various different modes, and enable the optical device to support multiple PON protocols, meeting the scenario requirements of multiple PON protocols coexisting.

[0117] Furthermore, the beam splitter 24 includes a first beam splitter block 241 with four light processing surfaces, and a first waveplate 242 and a second waveplate 243 mounted on the first beam splitter block 241. Different light processing surfaces have different light processing effects. With a smaller number of waveplates, light can be filtered, refracted, reflected, or transmitted according to different wavelengths. By utilizing the folded arrangement of the light path within the first beam splitter block 241, the transmission direction of different light rays can be adjusted. The structure of the beam splitter 24 is simpler, reducing the number of light processing elements such as filter elements and lens elements, reducing the geometric optical path of light, which is beneficial to reducing the volume of the beam splitter 24, and thus the overall size of the light receiving module 2.

[0118] Furthermore, the two waveplates in the beam splitter 24 are mounted on the first beam splitter block 241, making the beam splitter 24 an integrated component. The beam splitter 24 has a high degree of integration. Only by assembling this integrated component with the first housing 21 with high precision can the accurate positioning of multiple different optical paths be completed. This greatly simplifies the assembly and debugging process of the beam splitter 24, thereby helping to reduce the production and processing costs of the optical receiving module 2 and realizing the low-cost and miniaturized design of optical devices.

[0119] It should be noted that the materials of the first beam splitter 241, the first waveplate 242, and the second waveplate 243 can be glass, resin, etc. By adjusting the materials of the first beam splitter 241, the first waveplate 242, and the second waveplate 243, they can be made to have different light transmission characteristics, such as filtering characteristics, refractive index, etc. During the process of light entering or exiting, different transmission, reflection, or refraction effects can be exhibited for light of different wavelengths.

[0120] For example, the first direction 0a is the same as the width direction of the optical receiving module 2, and the second direction 0b is the same as the length direction of the optical receiving module 2.

[0121] In some possible implementations, the optical module in this embodiment can be applied to an optical network system where G PON, 10G PON, and 50G-PON coexist. For example, in one possible case, the existing optical network system can meet the transmission and reception requirements of G PON and 10G PON optical signals, and there are corresponding optical receivers to receive optical signals of these two wavelengths. When 50G PON optical signals are introduced, it is necessary to add an optical receiver corresponding to the 50G PON optical signals. That is, G PON and 10G PON share one optical receiver, and 50G PON uses one optical receiver.

[0122] Please refer to Figure 1 As shown, in some possible implementations, the first housing 21 is provided with a first connection end 211 and a second connection end 212 on opposite sides along the second direction 0b. The first connection end 211 is used to connect to the optical transmitting module 3. The optical transmitting module 3 can transmit side-light signals to the optical receiving module 2 through the first connection end 211. The second connection end 212 is used to connect to the optical fiber connection module 1. The optical fiber connection module 1 can input receiving side-light signals to the optical receiving module 2 through the second connection end 212, and can also receive transmitting side-light signals transmitted from the optical receiving module 2.

[0123] The optical transmitting module 3, the optical receiving module 2, and the optical fiber connection module 1 are connected to each other to form a complete optical device with optical transmitting and receiving functions.

[0124] For example, the light emitting module 3 may or may not be a packaged integrated element.

[0125] In another example, the first light receiving unit 22, the second light receiving unit 23 and the beam splitting component 24 are respectively encapsulated in the first housing 21.

[0126] Please refer to Figure 4 As shown, in some possible implementations, the first light processing surface 241a, the second light processing surface 241b and the third light processing surface 241c are respectively arranged at an angle relative to the second direction 0b, and the angle of inclination of the third light processing surface 241c relative to the second direction 0b is greater than the angle of inclination of the first light processing surface 241a and the second light processing surface 241b relative to the second direction 0b.

[0127] With the above arrangement, the light transmitted along the second direction 0b can be obliquely irradiated onto the first light processing surface 241a and the second light processing surface 241b. The first light processing surface 241a can transmit, reflect or refract the light, while the third light processing surface 241c has a larger tilt angle, which can increase the reflection angle of the light, so that the light irradiated onto the third light processing surface 241c has a larger emission range, thus meeting the position requirements of the second light receiving unit 23.

[0128] Please refer to Figure 4 As shown, in some possible implementations, the tilt angle α of the first light processing surface 241a relative to the first direction 0a ranges from 8° to 13.5°.

[0129] Please refer to Figure 4 As shown, in some possible implementations, the tilt angle β of the second light processing surface 241b relative to the first direction 0a ranges from 8° to 13.5°.

[0130] In this embodiment, when the tilt angles of the first optical processing surface 241a and the second optical processing surface 241b respectively meet the above-mentioned value ranges, the beam splitting component 24 can realize the beam splitting processing of optical signals in the wavelength ranges corresponding to G PON, 10G PON, and 50G PON. The setting of this tilt angle mainly considers the narrowest wavelength interval of the received wavelength, and can realize the transmission of one wavelength and the reflection of the other two wavelengths.

[0131] For example, the tilt angle α of the first light processing surface 241a is equal to the tilt angle β of the second light processing surface 241b, that is, the first light processing surface 241a and the second light processing surface 241b are parallel to each other.

[0132] In some possible implementations, the wavelength range of the optical signal of 50G PON (1284nm-1288nm) can be defined as the first wavelength range, and the wavelength range of the optical signal of 10G PON (1300nm-1330nm) and 10G PON (1260nm-1280nm) can be defined as the second wavelength range. That is, the optical signal on the receiving side may contain optical signals of the first wavelength range and the second wavelength range.

[0133] In some possible implementations, the optical receiving module 2 has three optical paths, the first optical path 001 as follows: Figure 1 As shown, the second optical path 002 is located between the first connection end 211 and the second connection end 212. Figure 2 As shown, the third optical path 003 is located between the second connection terminal 212 and the first optical receiving unit 22. Figure 3 As shown, it is located between the second connection terminal 212 and the second optical receiving unit 23.

[0134] The first optical path 001 is used to transmit the transmitting side optical signal emitted by the optical transmitting module 3 toward the optical fiber connection module 1. The first waveplate 242 can transmit or refract the transmitting side optical signal, so that the transmitting side optical signal enters the second optical processing surface 241b. The second optical processing surface 241b transmits and / or refracts the transmitting side optical signal, so that the transmitting side optical signal enters the first optical processing surface 241a. The first optical processing surface 241a transmits and / or refracts the transmitting side optical signal, so that the transmitting side optical signal enters the optical fiber connection module 1 along the first direction 0a.

[0135] The second optical path 002 and the third optical path 003 are used to transmit the receiving optical signal input from the optical fiber connection module 1. The receiving optical signal includes optical signals in the first wavelength range and optical signals in the second wavelength range. Therefore, it is necessary to use the beam splitter 24 to separate the optical signals in the first wavelength range and the optical signals in the second wavelength range.

[0136] In the second optical path 002, the first optical processing surface 241a can transmit or refract the optical signal in the first wavelength range, so that the optical signal in the first wavelength range is obliquely directed toward the second optical processing surface 241b. The second optical processing surface 241b can reflect the optical signal in the first wavelength range, so that the optical signal in the first wavelength range is obliquely directed toward the second wave plate 243. The second wave plate 243 can refract the optical signal in the first wavelength range, so that the optical signal in the first wavelength range is directed toward the first optical receiving unit 22.

[0137] In the third optical path 003, the first optical processing surface 241a can transmit or refract the optical signal in the second wavelength range, causing the optical signal in the second wavelength range to be obliquely directed toward the second optical processing surface 241b. The second optical processing surface 241b can reflect the optical signal in the second wavelength range, causing the optical signal in the second wavelength range to be obliquely directed toward the second waveplate 243. The second waveplate 243 can reflect the optical signal in the second wavelength range, causing the optical signal in the second wavelength range to be directed toward the fourth optical processing surface 241d. The fourth optical processing surface 241d can transmit or refract the optical signal in the second wavelength range, causing the optical signal in the second wavelength range to enter the second optical receiving unit 23.

[0138] It should be noted that in the optical path between the first optical processing surface 241a and the second waveplate 243, the second optical path 002 and the third optical path 003 can travel along the same path, meaning that the transmission and refraction effects of the optical signals in the first wavelength range and the second wavelength range on the first optical processing surface 241a and the second optical processing surface 241b are exactly the same. Alternatively, the second optical path 002 and the third optical path 003 can travel along different paths, meaning that the transmission and refraction effects of the optical signals in the first wavelength range and the second wavelength range on the first optical processing surface 241a and the second optical processing surface 241b are different. The separation of the optical signals in the first wavelength range and the second wavelength range is mainly achieved by the reflection and filtering effect of the second waveplate 243.

[0139] In addition, the third light processing surface 241c is used to reflect light signals in the second wavelength range. The angle can be designed so that total internal reflection occurs when light signals in the second wavelength range are irradiated by the third light processing surface 241c. Alternatively, a high-reflection film can be coated on the third light processing surface 241c so that specular reflection occurs when light signals in the second wavelength range are irradiated by the third light processing surface 241c.

[0140] The first optical processing surface 241a is used to realize the transmission or refraction of the transmitting side optical signal and the receiving side optical signal (including the first wavelength range and the second wavelength range), and the second optical processing surface 241b is used to realize the transmission or refraction of the transmitting side optical signal. It can be coated with an anti-reflection film system or a waveplate coated with an anti-reflection film system can be used to ensure light transmission performance.

[0141] The fourth optical processing surface 241d is used to realize the transmission or refraction of optical signals in the second wavelength range. It can be coated with an anti-reflection film system or a waveplate coated with an anti-reflection film system can be used to ensure light transmission performance.

[0142] In another example, optical signals in the first wavelength range and the second wavelength range can be incident on the first optical receiving unit 22 or the second optical receiving unit 23 along the axial direction or at a small angle, respectively.

[0143] Please refer to Figure 4 As shown, in some possible implementations, the first beam splitter 241 further includes a fifth light processing surface 241e, which is parallel to the fourth light processing surface 241d; the first light processing surface 241a, the fourth light processing surface 241d, the second light processing surface 241b, the third light processing surface 241c, and the fifth light processing surface 241e are connected end to end in sequence.

[0144] With the above arrangement, the first beam splitter 241 has five light processing surfaces, all of which can participate in the processing of light, so that the beam splitter 24 has more light processing effects and more flexible beam splitting methods, which is conducive to further optimizing the structure of the light receiving module 2 and realizing miniaturization and low-cost design.

[0145] Please refer to Figure 2 As shown, in some possible implementations, the beam splitter 24 further includes a first optical mirror 244, which is located in the light-gathering direction of the first light receiving unit 22 and is used to reflect light to the first light receiving unit 22.

[0146] By arranging a first optical mirror 244 in the light-gathering direction of the first optical receiving unit 22, the first optical mirror 244 can reflect the light signal of the first wavelength range transmitted along the second optical path 002 to the light-gathering direction of the first optical receiving unit 22, so that the light signal of the first wavelength range can enter the first optical receiving unit 22 along the light-gathering direction.

[0147] For example, the first optical mirror 244 is located on the refraction path of the second wave plate 243, and can reflect the light signal of the first wavelength range refracted by the second wave plate 243 to the first light receiving unit 22.

[0148] Please refer to Figure 5 As shown, in some possible implementations, the second waveplate 243 includes a first filter surface 243a, a first reflective surface 243b, and a first light-emitting surface 243c. The first filter surface 243a is attached to the first light processing surface 241a. Light can pass through the first light processing surface 241a and the first filter surface 243a to enter the second waveplate 243. After being reflected by the first reflective surface 243b, it is emitted from the first light-emitting surface 243c and enters the first light receiving unit 22.

[0149] By arranging a first filter surface 243a, a first reflective surface 243b, and a first light-emitting surface 243c within the second wave plate 243, the first filter surface 243a can filter out light outside the first wavelength range, allowing only light signals within the first wavelength range to pass through and enter the second wave plate 243. The first optical mirror 244 reflects the light signals within the first wavelength range to the first light-emitting surface 243c. The first light-emitting surface 243c can transmit or refract the light signals within the first wavelength range, enabling the light signals within the first wavelength range to enter the first light receiving unit 22 along the light-incoming direction.

[0150] For example, an optical signal in the first wavelength range transmitted along the second optical path 002 can pass through the first optical processing surface 241a and the first filter surface 243a and enter the second waveplate 243.

[0151] It should be noted that the second wave film 243 includes, but is not limited to, [other than]. Figure 5 The triangular prism shape shown can also be a quadrangular prism, a pentaangular prism, etc.

[0152] Please refer to Figure 6 As shown, in some possible implementations, the optical receiving module 2 further includes a third optical receiving unit 25, which is located on the same side of the first housing 21 along the first direction 0a as the second optical receiving unit 23.

[0153] The beam splitter assembly 24 also includes a third waveplate 245 and a fourth waveplate 246. The third waveplate 245 is located at the intersection of the light-incident direction of the second light-receiving unit 23 and the fourth light-processing surface 241d, and the fourth waveplate 246 is located at the intersection of the light-incident direction of the third light-receiving unit 25 and the fourth light-processing surface 241d.

[0154] With the above arrangement, the optical receiving module 2 can have three optical receiving units, which can respectively receive optical signals of three different wavelength ranges, and the optical receiving module 2 can support the reception of optical signals of three protocols.

[0155] The third light receiving unit 25 and the second light receiving unit 23 are arranged on the same side of the first housing 21 along the first direction 0a, which can reduce the difficulty of optical path design of the beam splitting component 24 and reduce the geometric optical path.

[0156] The structure of the third waveplate 245 is similar to that of the second waveplate 243. It has the functions of filtering and transmitting light, and can transmit or refract light signals in a specific wavelength range and reflect light signals in another specific wavelength range. The reflected light is the light signal that the third light receiving unit 25 needs to receive.

[0157] For example, in one possible scenario, an optical network system can meet the requirements for transmitting and receiving optical signals of G PON, 10G PON and 50G PON, with three corresponding optical receivers to receive optical signals of these three wavelengths: one optical receiver for G PON, one shared optical receiver for 10G PON, and one optical receiver for 50G PON.

[0158] For example, there is a fourth optical path 004 between the third optical receiving unit 25 and the second connection end 212 (i.e., the optical fiber connection module 1); the first optical splitter 241 includes a first optical processing surface 241a, a fourth optical processing surface 241d, a second optical processing surface 241b, a third optical processing surface 241c and a fifth optical processing surface 241e connected end to end in sequence.

[0159] The third optical path 003 sequentially passes through the optical fiber connection module 1, the first optical processing surface 241a, the second optical processing surface 241b, the first waveplate 242, the first optical processing surface 241a, the second waveplate 243, the third optical processing surface 241c, the fourth optical processing surface 241d, the third waveplate 245, and the second optical receiving unit 23.

[0160] The fourth optical path 004 passes sequentially through the first optical processing surface 241a, the second optical processing surface 241b, the first waveplate 242, the first optical processing surface 241a, the second waveplate 243, the third optical processing surface 241c, the fourth optical processing surface 241d, the third waveplate 245, the fifth optical processing surface 241e, the fourth optical processing surface 241d, the fourth waveplate 246, and the third optical receiving unit 25.

[0161] In some possible implementations, the wavelength range of the 50G PON (1284nm-1288nm) optical signal can be defined as the first wavelength range, the wavelength range of the 10G PON (1300nm-1330nm) optical signal as the second wavelength range, and the wavelength range of the 10G PON (1260nm-1280nm) optical signal as the third wavelength range. That is, the optical signal on the receiving side may contain optical signals in the first wavelength range, the second wavelength range, and the third wavelength range.

[0162] In some possible implementations, the optical receiving module 2 has four optical paths, the first optical path 001 as follows: Figure 1 As shown, the second optical path 002 is as follows Figure 2 As shown, the third optical path 003 and the fourth optical path 004 are as follows Figure 6 As shown, the third optical path 003 is shown as a solid line, and the fourth optical path 004 is shown as a dashed line.

[0163] The second optical path 002, the third optical path 003, and the fourth optical path 004 are used to transmit the receiving optical signal input from the optical fiber connection module 1. The receiving optical signal includes an optical signal in the first wavelength range, an optical signal in the second wavelength range, and an optical signal in the third wavelength range. The optical splitter 24 separates the optical signal in the first wavelength range, the optical signal in the second wavelength range, and the optical signal in the third wavelength range.

[0164] The optical signal transmission paths of the second optical path 002 and the third optical path 003 are basically the same as those in the aforementioned embodiments, and will not be described again here.

[0165] In the fourth optical path 004, the first optical processing surface 241a can transmit or refract the optical signal in the third wavelength range, causing the optical signal in the third wavelength range to be obliquely directed toward the second optical processing surface 241b. The second optical processing surface 241b can reflect the optical signal in the third wavelength range, causing the optical signal in the third wavelength range to be obliquely directed toward the second waveplate 243. The second waveplate 243 can reflect the optical signal in the third wavelength range, causing the optical signal in the third wavelength range to be directed toward the third waveplate 245 on the fourth optical processing surface 241d. The third waveplate 245 can reflect the optical signal in the third wavelength range, causing the optical signal in the third wavelength range to be directed toward the fifth optical processing surface 241e. The fifth optical processing surface 241e can reflect the optical signal in the third wavelength range, causing the optical signal in the third wavelength range to be directed toward the fourth waveplate 246 on the fourth optical processing surface 241d. The fourth waveplate 246 can transmit or refract the optical signal in the third wavelength range, causing the optical signal in the third wavelength range to enter the second optical receiving unit 23.

[0166] It should be noted that in the optical path between the first optical processing surface 241a and the second waveplate 243, the second optical path 002, the third optical path 003, and the fourth optical path 004 can be transmitted along the same path, meaning that the transmission and refraction effects of the optical signals in the first wavelength range and the second wavelength range on the first optical processing surface 241a and the second optical processing surface 241b are exactly the same. Alternatively, the second optical path 002, the third optical path 003, and the fourth optical path 004 can be transmitted along different paths, meaning that the transmission and refraction effects of the optical signals in the first wavelength range and the second wavelength range on the first optical processing surface 241a and the second optical processing surface 241b are different. The splitting of the optical signals in the first wavelength range, the second wavelength range, and the third wavelength range is mainly achieved by the reflection and filtering effect of the second waveplate 243.

[0167] In addition, the third light processing surface 241c and the fifth light processing surface 241e are used to reflect light signals in the third wavelength range. By designing the angle, the light signals in the third wavelength range can be made to undergo total internal reflection when they are irradiated on the third light processing surface 241c and the fifth light processing surface 241e. Alternatively, a high-reflection film can be coated on the third light processing surface 241c and the fifth light processing surface to make specular reflection occur when the light signals in the third wavelength range are irradiated on the third light processing surface 241c and the fifth light processing surface.

[0168] Please refer to Figure 6 As shown, in some possible implementations, the third optical receiving unit 25 and the second optical receiving unit 23 are arranged at a distance along the second direction 0b. This arrangement reduces the optical path design complexity of the beam splitter 24 and decreases the geometric optical path length.

[0169] Please refer to Figure 6 As shown, in some possible implementations, when the first beam splitter 241 includes a fifth light processing surface 241e, the fourth light processing surface 241d and the fifth light processing surface 241e are respectively arranged at an angle relative to the second direction Ob. This arrangement reduces the difficulty of optical path design for the beam splitter assembly 24 and reduces the geometric optical path length.

[0170] On the other hand, please refer to Figures 7 to 9 As shown, this embodiment provides an optical receiving module 2, which includes: a first housing 21, a first optical receiving unit 22, a second optical receiving unit 23, and a beam splitting component 24.

[0171] The first light receiving unit 22 and the second light receiving unit 23 are located on opposite sides of the first housing 21 along the first direction 0a, respectively; the beam splitting assembly 24 is located inside the first housing 21, and the beam splitting assembly 24 includes a first filter 247, a second optical mirror 248, a second beam splitting block 249 and a third optical mirror 2410.

[0172] The first filter element 247 is arranged at an angle, the second optical mirror 248 is located in the light-incident direction of the first light receiving unit 22, the third optical mirror 2410 is located in the light-incident direction of the second light receiving unit 23, and the second beam splitter 249 is located between the first filter element 247 and the second optical mirror 248, or between the first filter element 247 and the third optical mirror 2410, or between the second optical mirror 248 and the third optical mirror 2410.

[0173] The solution disclosed herein includes an optical receiver module 2 with a built-in beam splitter 24. This beam splitter 24 enables multi-path beam splitting processing, meeting the optical signal reception requirements of various different modes. This allows the optical device to support multiple PON protocols and meet the requirements of scenarios where multiple PON protocols coexist.

[0174] Furthermore, the beam splitting assembly 24 includes three light processing elements: a first filter 247, a second optical mirror 248, and a third optical mirror 2410, as well as a second beam splitter 249. The second beam splitter 249 can be arranged between any two light processing elements. By utilizing its own light filtering, emission, and / or refraction characteristics, it changes the light transmission direction between the two light processing elements, thereby allowing the positions of the three light processing elements to be optimized and adjusted. For example, by converting direct light into reflected or refracted light, the spacing between two adjacent light processing elements along the first direction Oa and / or the second direction Ob can be reduced, thereby compressing the size of the light receiving module 2 in the first direction Oa and / or the second direction Ob, and thus reducing the overall size of the light receiving module 2.

[0175] Among some possible implementations, refer to Figure 7 and Figure 8 As shown, the second optical mirror 248 can be either a reflector or a refractor. In some other possible implementations, the third optical mirror 2410 can also be either a reflector or a refractor.

[0176] In some possible implementations, the first housing 21 is provided with a first connection end 211 and a second connection end 212 on opposite sides along the second direction 0b. The first connection end 211 is used to connect to the optical transmitting module 3, and the optical transmitting module 3 can transmit side-light signals to the optical receiving module 2 through the first connection end 211. The second connection end 212 is used to connect to the optical fiber connection module 1, and the optical fiber connection module 1 can input receiving side-light signals to the optical receiving module 2 through the second connection end 212, and can also receive transmitting side-light signals transmitted from the optical receiving module 2.

[0177] The optical transmitting module 3, the optical receiving module 2, and the optical fiber connection module 1 are connected to each other to form a complete optical device with optical transmitting and receiving functions.

[0178] For example, the light emitting module 3 may or may not be a packaged integrated element.

[0179] For example, the first filter is arranged on the first optical path 001 between the first connection end 211 and the second connection end 212. The transmitting side light signal can pass through the first filter, and the receiving side light signal will be reflected by the first filter and then processed by other light processing elements in the beam splitter 24, so as to separate the transmitting side light signal and the receiving side light signal.

[0180] In some possible implementations, the second beam splitter 249 can transmit or refract light signals of a specific wavelength range in the receiving side light signal, so that they reach one of the first light receiving unit 22 and the second light receiving unit 23. It can also reflect light signals of another specific wavelength range in the receiving side light signal, so that light signals of a specific wavelength range can reach the other of the first light receiving unit 22 and the second light receiving unit 23.

[0181] Please refer to Figure 7 and Figure 8 As shown, in some possible implementations, the third optical mirror 2410 is located on the reflection path of the first filter 247, the second beam splitter 249 is located on the reflection path of the third optical mirror 2410, and the second optical mirror 248 is located on the reflection path of the second beam splitter 249.

[0182] With the above arrangement, the propagation direction of the receiving light signal reflected by the first filter 247 can be adjusted by using the third optical mirror 2410. By adjusting the position and reflection angle of the third optical mirror 2410, the position of the second beam splitter 249 can be optimized.

[0183] For example, refer to Figure 7 As shown, the third optical mirror 2410, the second beam splitter 249, and the second optical receiving unit 23 are aligned sequentially along the first direction 0a. This arrangement helps to reduce the spatial dimensions of the optical receiving module 2 along the second direction 0b, that is, to reduce the length of the optical receiving module 2.

[0184] In another example, the second beam splitter 249 includes a top surface that is inclined relative to the second direction 0b and a bottom surface that is parallel to the second direction 0b. The second optical mirror 248 and the first light receiving unit 22 are located in the inclined direction of the top surface, so that the second beam splitter 249 can use the inclined top surface to reflect light signals of a specific wavelength range to the second optical mirror 248, and then be reflected by the second optical mirror 248 to the first light receiving unit 22.

[0185] It should be noted that when the first light receiving unit 22 has the same tilt angle as the top surface of the second beam splitter 249, the second optical mirror 248 can be omitted, and the light signal reflected from the top surface of the second beam splitter 249 can directly enter the first light receiving unit 22.

[0186] Please refer to Figure 7 As shown, in some possible implementations, the second optical mirror 248 and the third optical mirror 2410 are located on one side of the first filter 247 along the first direction 0a, and the second beam splitter 249 is located on the opposite side of the first filter 247 along the first direction 0a.

[0187] With the above arrangement, the three optical processing elements, namely the second optical mirror 248, the third optical mirror 2410, and the second beam splitter 249, are divided into two groups and arranged on opposite sides of the first filter 247 along the first direction 0a, which helps to simplify the design difficulty of the optical path and reduce the geometric optical path.

[0188] Please refer to Figure 7 As shown, in some possible implementations, the third optical mirror 2410 is located on the reflection path of the first filter 247, the second beam splitter 249 is located on the reflection path of the third optical mirror 2410, and the second optical mirror 248 is located on the reflection path of the second beam splitter 249; the second optical mirror 248 and the third optical mirror 2410 are located on one side of the first filter 247 along the first direction 0a, and the second beam splitter 249 is located on the opposite side of the first filter 247 along the first direction 0a.

[0189] With the above arrangement, the optical path of the beam splitter 24 in the optical receiving module 2 is simple, the geometric optical path is small, and the length of the optical receiving module 2 is small, which is conducive to realizing the miniaturization design of optical devices.

[0190] Please refer to Figure 9 As shown, in some possible implementations, the second beam splitter 249 is located on the reflection path of the first filter 247, the second optical mirror 248 is located on the transmission or refraction path of the second beam splitter 249, and the third optical mirror 2410 is located on the reflection or refraction path of the second beam splitter 249.

[0191] With the above arrangement, the receiving light signal reflected by the first filter 247 first reaches the second beam splitter 249. The second beam splitter 249 transmits or refracts the light signal of a specific wavelength range onto the second optical mirror 248 according to the wavelength range, and reflects the light signal of another specific wavelength range onto the third optical mirror 2410. The light is split first and then reflected, so each reflector only needs to be designed in position and angle according to the specific wavelength range of light, making the structure simpler. Moreover, only one reflector needs to be arranged between the second beam splitter 249 and the two light receiving units, without the need for other additional light processing elements. This helps to reduce the spacing between the light processing elements in the light receiving module 2, thereby realizing the miniaturization and low-cost design of the light receiving module 2.

[0192] Please refer to Figure 9 As shown, in some possible implementations, the second optical mirror 248 and the second beam splitter 249 are located on one side of the first filter 247 along the first direction 0a, and the third optical mirror 2410 is located on the other side of the first filter 247 along the first direction 0a.

[0193] With the above arrangement, the optical path of the beam splitter 24 in the optical receiving module 2 is simple, the geometric optical path is small, and the length of the optical receiving module 2 is small, which is conducive to realizing the miniaturization design of optical devices.

[0194] Please refer to Figure 9 As shown, in some possible implementations, the second beam splitter 249 is located on the reflection path of the first filter 247, the second optical mirror 248 is located on the transmission or refraction path of the second beam splitter 249, and the third optical mirror 2410 is located on the reflection path of the second beam splitter 249; the second optical mirror 248 and the second beam splitter 249 are located on one side of the first filter 247 along the first direction 0a, and the third optical mirror 2410 is located on the other side of the first filter 247 along the first direction 0a.

[0195] With the above arrangement, the optical path of the beam splitter 24 in the optical receiving module 2 is simple, the geometric optical path is small, and the length of the optical receiving module 2 is small, which is conducive to realizing the miniaturization design of optical devices.

[0196] For example, the second optical mirror 248 and the first light receiving unit 22 are aligned along the first direction 0a, the third optical mirror 2410 and the second light receiving unit 23 are aligned along the first direction 0a, and the positions of the second optical mirror 248 and the first light receiving unit 22 are arranged at a small interval with the positions of the third optical mirror 2410 and the second light receiving unit 23 along the second direction 0b. This interval can be optimized by adjusting the refraction angle of the light signal by the second beam splitter 249.

[0197] On the other hand, please refer to Figure 1 and Figure 7 As shown, this embodiment provides an optical device, which includes: an optical receiving module 2, an optical fiber connection module 1, and an optical transmitting module 3; the optical fiber connection module 1 and the optical transmitting module 3 are respectively located on opposite sides of the first housing 21 along the second direction 0b, and a first optical path 001 is provided between the optical fiber connection module 1 and the optical transmitting module 3; a second optical path 002 is provided between the optical fiber connection module 1 and the first optical receiving unit 22, and a third optical path 003 is provided between the optical fiber connection module 1 and the second optical receiving unit 23.

[0198] The solution shown in this embodiment uses the optical receiving module 2 provided in this disclosure, and has all the beneficial technical effects of this disclosure. The optical device is a combo device, and the optical receiving module 2 has a built-in beam splitter 24. The beam splitter 24 can be used to realize the beam splitting processing of the first optical path 001, the second optical path 002, and the third optical path 003, so as to meet the optical signal transmission requirements of three different modes. This allows the optical device to support three PON protocols and meet the scenario requirements of the coexistence of the three PON protocols.

[0199] Moreover, in the optical receiving module 2, the size of the beam splitting component 24 along the first direction 0a and / or the second direction 0b is small, and the material and production costs are low, which realizes the miniaturization and low cost of the optical receiving module 2, and thus is conducive to the miniaturization and low cost design of optical devices.

[0200] In some possible implementations, the first optical receiving unit 22 and the optical fiber connection module 1 are located on the side where the first optical processing surface 241a is located, and the second optical receiving unit 23 is located on the side where the fourth optical processing surface 241d is located.

[0201] With the above arrangement, the length and width of the optical device are relatively small, which is beneficial for the miniaturization and low-cost design of the optical device.

[0202] In some possible implementations, the fiber optic connection module 1 includes an optical fiber component 11 and a first collimating lens 12, which is located between the optical fiber component 11 and the first optical processing surface 241a. The first collimating lens 12 can collimate the light emitted by the optical fiber component 11 into parallel light, thereby improving the transmission efficiency of the optical signal.

[0203] Please refer to Figure 1 As shown, in some possible implementations, the light emitting module 3 includes a first light emitting component 31, a second light emitting component 32, and a light combining component 33. The light emission direction of the first light emitting component 31 is parallel to the first direction Oa, the light emission direction of the second light emitting component 32 is parallel to the second direction Ob, and the light combining component 33 is located at the intersection of the light emission directions of the first light emitting component 31 and the second light emitting component 32. The light combining component 33 can combine the light emitted by the first light emitting component 31 and the second light emitting component 32 and transmit them along the first optical path 001.

[0204] With the above arrangement, the optical transmitting module 3 can use the first optical transmitting component 31 and the second optical transmitting component 32 to transmit optical signals of two wavelength ranges. This is suitable for situations where the optical transmitting components transmit optical signals of two wavelength ranges. For example, it can be applied to scenarios where 10G PON and 50G PON coexist: the first optical transmitting component 31 transmits the optical signal corresponding to 50G PON and the second optical transmitting component 32 transmits the optical signal corresponding to 10G PON, or the first optical transmitting component 31 transmits the optical signal corresponding to 10G PON and the second optical transmitting component 32 transmits the optical signal corresponding to 50G PON; in scenarios where GPON and 10G PON coexist: the first optical transmitting component 31 transmits the optical signal corresponding to 10G PON and the second optical transmitting component 32 transmits the optical signal corresponding to GPON, or the first optical transmitting component 31 transmits the optical signal corresponding to GPON and the second optical transmitting component 32 transmits the optical signal corresponding to 10G PON.

[0205] In optical networks where G PON, 10G PON, and 50G PON coexist, a third optical transmitting component is also included.

[0206] Please refer to Figure 1 As shown, in some possible implementations, the first light emitting assembly 31 includes a first light emitting unit 311, a second collimating lens 312, and an isolator 313, with the second collimating lens 312 and the isolator 313 sequentially located in the light emission direction of the first light emitting unit 311; wherein, the first light emitting unit 311 is used to emit light signals within a specific wavelength range, the second collimating lens 312 can be used to collimate the focusing light emitted by the light emitter into parallel light, thereby improving the signal transmission distance and efficiency; and the isolator 313 is used to block the input signal and the output signal.

[0207] Please refer to Figure 1 As shown, in some possible implementations, the second light emitting assembly 32 includes a second light emitting unit 321 and a third collimating lens 322, with the third collimating lens 322 located in the light emission direction of the second light emitting unit 321. The second light reflecting unit 321 is used to emit light signals within a specific wavelength range, and the third collimating lens 322 can be used to collimate the focused light emitted by the light emitter into parallel light, thereby improving signal transmission distance and efficiency.

[0208] It is understandable that optical devices also include peripheral electronic components. The optical receiving module 2 and the optical emitting component are electrically connected to the peripheral electronic components. Specifically, flexible printed circuit boards (FPCs) can be used for fan-out or low-cost pin pins can be used for direct output to reduce the overall length of the component.

[0209] On the other hand, an optical communication device is provided, which includes the optical receiving module or the optical device disclosed herein.

[0210] The above description is only for the purpose of enabling those skilled in the art to understand the technical solutions disclosed herein, and is not intended to limit the scope of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. An optical receiving module, characterized in that, The optical receiving module (2) includes: a first housing (21), a first optical receiving unit (22), a second optical receiving unit (23), and a beam splitting component (24); The first light receiving unit (22) and the second light receiving unit (23) are respectively located on opposite sides of the first housing (21) along the first direction (0a); the beam splitting component (24) is located inside the first housing (21), and the beam splitting component (24) includes a first beam splitting block (241), a first waveplate (242), and a second waveplate (243); The first beam splitter (241) includes a first light processing surface (241a), a second light processing surface (241b), a third light processing surface (241c), and a fourth light processing surface (241d); The first light processing surface (241a) is located on one side of the first beam splitter (241) along the second direction (0b), and the second light processing surface (241b) and the third light processing surface (241c) are located on the other side of the first beam splitter (241) along the second direction (0b); the first waveplate (242) is attached to the second light processing surface (241b), and the second waveplate (243) is attached to the first light processing surface (241a), wherein the second direction (0b) and the first direction (0a) are perpendicular to each other.

2. The optical receiving module according to claim 1, characterized in that, The first light processing surface (241a), the second light processing surface (241b), and the third light processing surface (241c) are respectively arranged at an angle relative to the first direction (0a), and the angle of inclination of the third light processing surface (241c) relative to the first direction (0a) is greater than the angles of inclination of the first light processing surface (241a) and the second light processing surface (241b) relative to the first direction (0a).

3. The optical receiving module according to claim 2, characterized in that, The tilt angle α of the first light-processed surface (241a) relative to the first direction (0a) ranges from 8° to 13.5°. And / or, The tilt angle β of the second light-processed surface (241b) relative to the first direction (0a) ranges from 8° to 13.5°.

4. The optical receiving module according to any one of claims 1 to 3, characterized in that, The first beam splitter (241) also includes a fifth light processing surface (241e); The first light processing surface (241a), the fourth light processing surface (241d), the second light processing surface (241b), the third light processing surface (241c), and the fifth light processing surface (241e) are connected end to end in sequence.

5. The optical receiving module according to any one of claims 1 to 4, characterized in that, The beam splitter (24) further includes a first optical mirror (244), which is located in the light-gathering direction of the first light receiving unit (22) and is used to reflect light to the first light receiving unit (22).

6. The optical receiving module according to any one of claims 1 to 5, characterized in that, The second waveplate (243) includes a first filter surface (243a) and a first reflective surface (243b). The first filter surface (243a) is attached to the first light processing surface (241a). Light can pass through the first light processing surface (241a) and the first filter surface (243a) to enter the second waveplate (243). After being reflected by the first reflective surface (243b), it enters the first light receiving unit (22).

7. The optical receiving module according to any one of claims 1 to 6, characterized in that, The optical receiving module (2) further includes a third optical receiving unit (25), which is located on the same side of the first housing (21) along the first direction (0a) as the second optical receiving unit (23). The beam splitting assembly (24) further includes a third waveplate (245) and a fourth waveplate (246). The third waveplate (245) is located at the intersection of the light-incident direction of the second light-receiving unit (23) and the fourth light-processing surface (241d). The fourth waveplate (246) is located at the intersection of the light-incident direction of the third light-receiving unit (25) and the fourth light-processing surface (241d).

8. The optical receiving module according to claim 7, characterized in that, When the first beam splitter (241) includes a fifth light processing surface (241e), the fourth light processing surface (241d) and the fifth light processing surface (241e) are respectively arranged at an angle relative to the second direction (0b).

9. An optical receiving module, characterized in that, The optical receiving module (2) includes: a first housing (21), a first optical receiving unit (22), a second optical receiving unit (23), and a beam splitting component (24); The first light receiving unit (22) and the second light receiving unit (23) are respectively located on opposite sides of the first housing (21) along the first direction (0a); the beam splitting component (24) is located inside the first housing (21), and the beam splitting component (24) includes a first filter (247), a second optical mirror (248), a second beam splitter (249), and a third optical mirror (2410); The first filter (247) is arranged at an angle, the second optical mirror (248) is located in the light-gathering direction of the first light-receiving unit (22), the third optical mirror (2410) is located in the light-gathering direction of the second light-receiving unit (23), and the second beam splitter (249) is located between the first filter (247) and the second optical mirror (248), or between the first filter (247) and the third optical mirror (2410), or between the second optical mirror (248) and the third optical mirror (2410).

10. The optical receiving module according to claim 9, characterized in that, The third optical mirror (2410) is located on the reflection path of the first filter (247), the second beam splitter (249) is located on the reflection path of the third optical mirror (2410), and the second optical mirror (248) is located on the reflection path of the second beam splitter (249). And / or, The second optical mirror (248) and the third optical mirror (2410) are located on one side of the first filter (247) along the first direction (0a), and the second beam splitter (249) is located on the opposite side of the first filter (247) along the first direction (0a).

11. The optical receiving module according to claim 9, characterized in that, The second beam splitter (249) is located on the reflection path of the first filter (247), the second optical mirror (248) is located on the transmission or refraction path of the second beam splitter (249), and the third optical mirror (2410) is located on the reflection or refraction path of the second beam splitter (249). And / or, The second optical mirror (248) and the second beam splitter (249) are located on one side of the first filter (247) along the first direction (0a), and the third optical mirror (2410) is located on the other side of the first filter (247) along the first direction (0a).

12. An optical device, characterized in that, The optical device includes: an optical receiving module (2) according to any one of claims 1 to 11, an optical fiber connection module (1), and an optical transmitting module (3); The optical fiber connection module (1) and the optical emission module (3) are respectively located on opposite sides of the first housing (21) along the second direction (0b), and there is a first optical path (001) between the optical fiber connection module (1) and the optical emission module (3); There is a second optical path (002) between the optical fiber connection module (1) and the first optical receiving unit (22), and there is a third optical path (003) between the optical fiber connection module (1) and the second optical receiving unit (23).

13. The optical device according to claim 12, characterized in that, The light emitting module (3) includes a first light emitting component (31), a second light emitting component (32), and a light combining component (33); The light emission direction of the first light emitting component (31) is parallel to the first direction (0a), and the light emission direction of the second light emitting component (32) is parallel to the second direction (0b). The light combining component (33) is located at the intersection of the light emission direction of the first light emitting component (31) and the light emission direction of the second light emitting component (32). The light combining component (33) can combine the light emitted by the first light emitting component (31) and the second light emitting component (32) and transmit them along the first optical path (001).

14. An optical communication device, characterized in that, The optical communication device includes the optical receiving module (2) according to any one of claims 1 to 11, or the optical device according to any one of claims 12 to 13.

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