50GPON wavelength division multiplexing passive optical device
By designing a 50GPON wavelength division multiplexing passive optical device, using shell, wavelength division multiplexing components and light reflection components, the combined wave and demultiplexing of upstream and downstream optical signals is realized, solving the problem of large space occupation of traditional GPON and XGPON systems, and improving the applicability and optical performance of the module.
Patent Information
- Application Number
- CN202422458220.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-11
AI Technical Summary
Traditional Gibit Passive Optical Network (GPON) and 10 Gibit Passive Optical Network (XGPON) systems have problems with space occupation, which are difficult to deploy flexibly and cannot meet users' needs for bandwidth upgrades.
A 50GPON wavelength division multiplexing passive optical device is designed, using a shell, a wavelength division multiplexing component, an angle prism and light reflection component. The wavelength combination and demultiplexing of upstream and downstream optical signals is realized through a wavelength division multiplexing component to reduce space occupation.
The space occupation of the wavelength division multiplexing module is reduced, which improves applicability, adapts to a wider range of application scenarios and stricter space requirements, reduces costs, and improves optical performance.
Smart Images
Figure CN223166942U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical communication, and particularly relates to a 50G PON wavelength division multiplexing passive optical device. Background Art
[0002] With the progress of society and the explosive growth of information volume, especially the advent of the big data era, people's requirements for broadband access speed are increasing day by day. The 100M broadband service provided by the traditional Gigabit Passive Optical Network (GPON) has gradually been difficult to meet the needs of users. For this reason, operators have upgraded the network to the 10G PON (also known as XG PON) system. Driven by the development of the industry, 50G PON is gradually becoming the development direction of the next-generation PON network. However, since the demand for bandwidth upgrade by home users is not urgent, GPON and 10G PON systems still need to serve the market for a long time. For enterprise users with high network bandwidth requirements, they may choose to upgrade to the 50G PON system in the future. In this context, the three generations of optical components, namely G-PON, XG-PON, and 50G-PON, may coexist, which requires the use of wavelength division multiplexing (WDM) technology to perform wavelength multiplexing and demultiplexing of the uplink and downlink optical signals of GPON, XG PON, and 50G PON.
[0003] The multiplexing technology is to combine optical signals of different wavelengths through specific means to achieve simultaneous transmission in a single optical fiber. This process is mainly completed by a combiner. The demultiplexing technology is the process of separating the multiplexed optical signals combined by the combiner in the WDM system, that is, the reverse operation process of multiplexing, which is usually realized by a demultiplexer. The purpose of demultiplexing is to restore the different wavelength optical signals after multiplexing to the original multiple optical signals so that they can be independently processed or transmitted subsequently.
[0004] In related deployments, since it is necessary to separately set a combiner and a demultiplexer, this leads to problems in the space occupation of the wavelength division multiplexing module, which is not conducive to its flexible deployment. Therefore, how to optimize the design of the wavelength division multiplexing module and reduce the space occupation on the premise of ensuring performance has become an urgent problem to be solved. Summary of the Utility Model
[0005] The main object of the utility model is to propose a 50G PON wavelength division multiplexing passive optical device, aiming to reduce the space occupation of the wavelength division multiplexing module to adapt to a wider range of application scenarios and more stringent space requirements.
[0006] To achieve the above object, the 50G PON wavelength division multiplexing passive optical device proposed by the present utility model includes a housing, a wavelength division multiplexing component, a corner prism, an upstream optical reflection component, and a downstream optical reflection component. A main optical path transceiver, an upstream optical transmission component, and a downstream optical reception component are provided on the housing. The wavelength division multiplexing component, the corner prism, the upstream optical reflection component, and the downstream optical reflection component are all encapsulated in the housing. The wavelength division multiplexing component is located between the corner prism and the main optical path transceiver. The wavelength division multiplexing component has a first working layer and a second working layer. After the downstream optical signal emitted by the main optical path transceiver enters the first working layer, it is demultiplexed by the first working layer and then transmitted to the downstream optical reflection component. The downstream optical reflection component reflects the demultiplexed downstream optical signal to the downstream optical reception component. The upstream optical signal emitted by the upstream optical transmission component is reflected by the upstream optical reflection component to the second working layer. The second working layer multiplexes the upstream optical signal. The corner prism reflects the multiplexed upstream optical signal to the first working layer and transmits through the first working layer into the main optical path transceiver.
[0007] In an embodiment, the upstream optical transmission component includes a first upstream optical transmitter, a second upstream optical transmitter, and a third upstream optical transmitter. The first upstream optical transmitter is used to emit an optical signal in a first wavelength range, the second upstream optical transmitter is used to emit an optical signal in a second wavelength range, and the third upstream optical transmitter is used to emit an optical signal in a third wavelength range. The downstream optical reception component includes a first downstream optical receiver, a second downstream optical receiver, and a third downstream optical receiver. The first downstream optical receiver is used to receive an optical signal in a fourth wavelength range, the second downstream optical receiver is used to receive an optical signal in a fifth wavelength range, and the third downstream optical receiver is used to receive an optical signal in a sixth wavelength range.
[0008] In one embodiment, the wavelength division multiplexing component includes a wavelength division multiplexing prism, a beam splitting filter, a first high reflection filter, a first downlink optical filter, a second downlink optical filter, and a third downlink optical filter. The first working layer and the second working layer are formed on the wavelength division multiplexing prism. The first downlink optical filter and the second downlink optical filter are both disposed on a side of the wavelength division multiplexing prism facing away from the corner prism and are located in the first working layer. The beam splitting filter, the first high reflection filter, and the third downlink optical filter are all disposed on a side of the wavelength division multiplexing prism facing the corner prism and are located in the first working layer. After the downlink optical signal emitted by the main optical path transceiver enters the wavelength division multiplexing prism, it sequentially passes through the beam splitting filter, the second downlink optical filter, the first high reflection filter, the first downlink optical filter, and the third downlink optical filter. The beam splitting filter allows optical signals in a first wavelength range, a second wavelength range, and a third wavelength range to pass through. The first downlink optical filter allows optical signals in a fourth wavelength range to pass through. The second downlink optical filter allows optical signals in a fifth wavelength range to pass through. The third downlink optical filter allows optical signals in a sixth wavelength range to pass through.
[0009] In one embodiment, the wavelength division multiplexing component further includes a first uplink optical filter, a second uplink optical filter, a third uplink optical filter, a second high reflection filter, and a third high reflection filter. The first uplink optical filter, the second uplink optical filter, and the second high reflection filter are all disposed on a side of the wavelength division multiplexing prism facing away from the corner prism and are located in the second working layer. The third uplink optical filter and the third high reflection filter are both disposed on a side of the wavelength division multiplexing prism facing the corner prism and are located in the second working layer. After the optical signal emitted by the first uplink optical transmitter passes through the first uplink optical filter and enters the wavelength division multiplexing prism, it sequentially passes through the third uplink optical filter, the second uplink optical filter, the third high reflection filter, and the second high reflection filter and then transmits out of the second working layer to the corner prism. After the optical signal emitted by the second uplink optical transmitter passes through the second uplink optical filter and enters the wavelength division multiplexing prism, it is multiplexed with the uplink optical signal emitted by the first uplink optical transmitter. After the optical signal emitted by the third uplink optical transmitter passes through the third uplink optical filter and enters the wavelength division multiplexing prism, it is multiplexed with the uplink optical signal emitted by the first uplink optical transmitter. The corner prism reflects the multiplexed optical signal to the beam splitting filter, and then sequentially transmits through the beam splitting filter and the first working layer and enters the main optical path transceiver.
[0010] In one embodiment, the upstream optical reflection component includes a first upstream optical reflector, a second upstream optical reflector, and a third upstream optical reflector, and the downstream optical reflection component includes a first downstream optical reflector, a second downstream optical reflector, and a third downstream optical reflector; the first upstream optical reflector reflects the optical signal emitted by the first upstream optical emitter to the first upstream optical filter, the second upstream optical reflector reflects the optical signal emitted by the second upstream optical emitter to the second upstream optical filter, and the third upstream optical reflector reflects the optical signal emitted by the third upstream optical emitter to the third upstream optical filter; the first downstream optical reflector reflects the optical signal transmitted by the first downstream optical filter to the first downstream optical receiver, the second downstream optical reflector reflects the optical signal transmitted by the second downstream optical filter to the second downstream optical receiver, and the third downstream optical reflector reflects the optical signal transmitted by the third downstream optical filter to the third downstream optical receiver.
[0011] In one embodiment, the first upstream optical emitter is configured to emit an optical signal with a wavelength of 1286 nm, the second upstream optical emitter is configured to emit an optical signal with a wavelength of 1310 nm, and the third upstream optical emitter is configured to emit an optical signal with a wavelength of 1270 nm; the first downstream optical receiver is configured to receive an optical signal with a wavelength of 1342 nm, the second downstream optical receiver is configured to receive an optical signal with a wavelength of 1490 nm, and the third downstream optical receiver is configured to receive an optical signal with a wavelength of 1577 nm.
[0012] In one embodiment, the corner prism has two mutually perpendicular reflecting surfaces.
[0013] In one embodiment, the upstream optical emission component and the downstream optical reception component are disposed on opposite side walls of the housing.
[0014] In one embodiment, the 50G PON wavelength division multiplexing passive optical device adopts a Z-block packaging method.
[0015] In one embodiment, the main optical path transceiver, the upstream optical emission component, and the downstream optical reception component are collimators.
[0016] The 50G PON wavelength division multiplexing passive optical device of the present utility model adopts a structure including a housing, a wavelength division multiplexing component, a corner prism, an upstream optical reflection component, and a downstream optical reflection component. The housing is provided with a main optical path transceiver, an upstream optical emission component, and a downstream optical reception component. The wavelength division multiplexing component has two working layers. The first working layer is used for demultiplexing, and the second working layer is used for multiplexing. The corner prism realizes the transmission of optical signals between the second working layer and the first working layer. The upstream optical signal emitted by the upstream optical emission component sequentially passes through the upstream optical reflection component, the second working layer, the corner prism, the first working layer, and the main optical path transceiver. The downstream optical signal emitted by the main optical path transceiver sequentially passes through the first working layer, the downstream optical reflection component, and the downstream optical reception component. In this way, the wavelength multiplexing and demultiplexing of the upstream and downstream optical signals can be completed only through one wavelength division multiplexing component, achieving the beneficial effects of reducing the space occupied by the wavelength division multiplexing module and improving the applicability of the wavelength division multiplexing module. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.
[0018] Figure 1 FIG. is a schematic structural diagram of an embodiment of the 50G PON wavelength division multiplexing passive optical device provided by the present utility model;
[0019] Figure 2 FIG. Figure 1 is a top view of the 50G PON wavelength division multiplexing passive optical device in FIG.
[0020] Figure 3 FIG. Figure 2 is a schematic structural diagram of the wavelength division multiplexing component in FIG.
[0021] Figure 4 FIG. Figure 3 is an elevation view of FIG. from the A - A' perspective;
[0022] Figure 5 FIG. Figure 3 is an elevation view of FIG. from the B - B' perspective;
[0023] Figure 6 FIG. Figure 2 is a schematic diagram of the upstream optical path of the 50G PON wavelength division multiplexing passive optical device in FIG.
[0024] Figure 7 FIG. Figure 6 is a schematic diagram of the upstream optical path of the C - C' cross - section in FIG.
[0025] Figure 8 is Figure 6 a schematic diagram of the downstream optical path of a 50 GPON wavelength division multiplexing passive optical device in
[0026] Figure 9 is Figure 6 a schematic diagram of the downstream optical path of the C-C’ cross-section in
[0027] Explanation of the reference numerals in the attached drawings:
[0028] 1000, 50 GPON wavelength division multiplexing passive optical device;
[0029] 1. Housing; 11. Bottom shell; 12. Top cover;
[0030] 2. Wavelength division multiplexing component; 2a. First working layer; 2b. Second working layer;
[0031] 21. Wavelength division multiplexing prism; 22. Beam splitting and filtering film;
[0032] 231. First high reflection filtering film; 232. Second high reflection filtering film; 233. Third high reflection filtering film;
[0033] 241. First downstream optical filtering film; 242. Second downstream optical filtering film; 243. Third downstream optical filtering film;
[0034] 251. First upstream optical filtering film; 252. Second upstream optical filtering film; 253. Third upstream optical filtering film;
[0035] 3. Corner prism; 31. First reflecting surface; 32. Second reflecting surface;
[0036] 4. Upstream optical reflection component; 41. First upstream optical reflection member; 42. Second upstream optical reflection member; 43. Third upstream optical reflection member;
[0037] 5. Downstream optical reflection component; 51. First downstream optical reflection member; 52. Second downstream optical reflection member; 53. Third downstream optical reflection member;
[0038] 6. Main optical path transceiver;
[0039] 7. Upstream optical emission component; 71. First upstream optical emission member; 72. Second upstream optical emission member; 73. Third upstream optical emission member;
[0040] 8. Downstream optical reception component; 81. First downstream optical reception member; 82. Second downstream optical reception member; 83. Third downstream optical reception member.
[0041] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed implementation manners
[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0045] The present utility model provides a 50G PON wavelength division multiplexing passive optical device 1000.
[0046] Please refer to Figures 1 to 3, in an embodiment of the present utility model, the 50G PON wavelength division multiplexing passive optical device 1000 proposed by the present utility model includes a housing 1, a wavelength division multiplexing component 2, a corner prism 3, an upstream optical reflection component 4, and a downstream optical reflection component 5. A main optical path transceiver 6, an upstream optical transmission component 7, and a downstream optical reception component 8 are provided on the housing 1. The wavelength division multiplexing component 2, the corner prism 3, the upstream optical reflection component 4, and the downstream optical reflection component 5 are all encapsulated in the housing 1, and the wavelength division multiplexing component 2 is located between the corner prism 3 and the main optical path transceiver 6. The wavelength division multiplexing component 2 has a first working layer 2a and a second working layer 2b. After the downstream optical signal emitted by the main optical path transceiver 6 enters the first working layer 2a, it is demultiplexed by the first working layer 2a and then transmitted to the downstream optical reflection component 5. The downstream optical reflection component 5 reflects the demultiplexed downstream optical signal to the downstream optical reception component 8. The upstream optical signal emitted by the upstream optical transmission component 7 is reflected by the upstream optical reflection component 4 to the second working layer 2b. The second working layer 2b multiplexes the upstream optical signal. The corner prism 3 reflects the multiplexed upstream optical signal to the first working layer 2a and transmits it through the first working layer 2a into the main optical path transceiver 6.
[0047] In this embodiment, the housing 1 includes a bottom case 11 and a top cover 12. A box-shaped encapsulation groove is formed in the bottom case 11. The wavelength division multiplexing component 2, the corner prism 3, the upstream optical reflection component 4, and the downstream optical reflection component 5 are all provided in the encapsulation groove. The top cover 12 closes the notch of the encapsulation groove. Through holes are opened on two opposite side walls of the bottom case 11. The upstream optical transmission component 7 and the downstream optical reception component 8 are respectively provided on the two opposite side walls and inserted into the through holes. There is another side wall of the bottom case 11 that is perpendicular to the above two side walls. Similarly, a through hole is also centrally opened on this side wall. The main optical path transceiver 6 is provided on this side wall and inserted into the through hole. In this way, the upstream optical transmission component 7 and the downstream optical reception component 8 are symmetric about the downstream light ray emitted by the main optical path transceiver.
[0048] One end of the main optical path transceiver 6 facing away from the bottom case 11 is connected to an optical fiber, which is used to input the downstream optical signal in the optical fiber into the encapsulation groove, and receive the multiplexed upstream light in the optical device in the encapsulation groove and output it into the optical fiber. Specifically, the main optical path transceiver 6 includes a collimator, and the collimator is inserted into the side wall of the bottom case 11. One end of the collimator away from the bottom case 11 is connected to the optical fiber. Similarly, the upstream optical transmission component 7 includes at least one collimator. One end of the collimator is connected to the installation groove, and the other end is connected to a laser emitter. The downstream optical reception component includes at least one collimator. One end of the collimator is connected to the installation groove, and the other end is connected to a photodetector.
[0049] The upstream optical reflection component 4 and the downstream optical reflection component 5 adopt a reflecting prism or a reflector. Optionally, a triangular prism-shaped reflecting prism can be used. The triangular prism has two mutually perpendicular planes and an inclined plane connecting the two planes. The inclined side of the triangular prism is the reflecting surface. Due to the characteristic that the triangular prism has two mutually perpendicular planes, it is convenient to position in the encapsulation groove during installation and check the accuracy of the installation position.
[0050] Specifically, please refer to Figures 6 to 9 , the wavelength division multiplexing component 2 includes a wavelength division multiplexing prism 21 and a filter. The wavelength division multiplexing prism 21 has two mutually parallel planes, and the filter is attached to the two planes. In the first working layer 2a, the downstream light is incident on the wavelength division multiplexing prism 21 at a certain angle with respect to the two planes and undergoes multiple reflections within the two planes. Different filters are provided at each reflection point to enable light signals of different wavelengths to be transmitted, thereby achieving the demultiplexing of the downstream optical signal. The wavelength division multiplexing prism 21, the turning prism 3, and the main optical path transceiver 6 are located on the same straight line. The main optical path transceiver 6, the downstream optical receiving component 8, and the first working layer 2a of the wavelength division multiplexing component are at the same horizontal height. The upstream optical reflection component 4 and the second working layer 2b of the wavelength division multiplexing component are at the same horizontal height. In the second working layer 2b, multiple upstream light rays are respectively incident on the wavelength division multiplexing prism 21 at a certain angle with respect to the two planes. Different filters are provided at the incident points to enable light signals of different wavelengths to be transmitted and enter. After undergoing multiple reflections within the two planes, they are normalized to the same exit point and exit the turning prism 3 at the same exit angle, thereby achieving the multiplexing of the upstream optical signal. The multiplexed upstream optical signal uses the turning prism 3 to enter the first working layer 2a and coincide with the downstream optical path to achieve alignment with the main optical path transceiver 6.
[0051] The 50G PON wavelength division multiplexing passive optical device 1000 of this embodiment adopts a structure including a housing 1, a wavelength division multiplexing component 2, a corner prism 3, an upstream optical reflection component 4, and a downstream optical reflection component 5. A main optical path transceiver 6, an upstream optical transmission component 7, and a downstream optical reception component 8 are provided on the housing 1. The wavelength division multiplexing component 2 has two working layers. The first working layer 2a is used for demultiplexing, and the second working layer 2b is used for multiplexing. The corner prism 3 realizes the transmission of optical signals between the second working layer 2b and the first working layer 2a. The upstream optical signal emitted by the upstream optical transmission component 7 sequentially passes through the upstream optical reflection component 4, the second working layer 2b, the corner prism 3, the first working layer 2a, and the main optical path transceiver 6. The downstream optical signal emitted by the main optical path transceiver 6 sequentially passes through the first working layer 2a, the downstream optical reflection component 5, and the downstream optical reception component 8. In this way, the wavelength multiplexing and demultiplexing of the upstream and downstream optical signals can be completed only through one wavelength division multiplexing component 2, achieving the beneficial effects of reducing the space occupied by the wavelength division multiplexing module and improving the applicability of the wavelength division multiplexing module, being more suitable for the miniaturization requirements of the client. Compared with the traditional "one-word" arrangement method, the optical path length is shortened by half, the optical performance is improved, and the cost is lower.
[0052] Further, please refer to Figure 1 , in an embodiment of the present invention, the upstream optical transmission component 7 includes a first upstream optical transmission element 71, a second upstream optical transmission element 72, and a third upstream optical transmission element 73. The first upstream optical transmission element 71 is used for emitting optical signals in a first wavelength range, the second upstream optical transmission element 72 is used for emitting optical signals in a second wavelength range, and the third upstream optical transmission element 73 is used for emitting optical signals in a third wavelength range. The downstream optical reception component 8 includes a first downstream optical reception element 81, a second downstream optical reception element 82, and a third downstream optical reception element 83. The first downstream optical reception element 81 is used for receiving optical signals in a fourth wavelength range, the second downstream optical reception element 82 is used for receiving optical signals in a fifth wavelength range, and the third downstream optical reception element 83 is used for receiving optical signals in a sixth wavelength range.
[0053] In this embodiment, the first upstream optical transmitter 71 is used to transmit the upstream optical signal of 50GPON, with the first wavelength range being 1284nm - 1288nm; the second upstream optical transmitter 72 is used to transmit the upstream optical signal of GPON, with the second wavelength range being 1290nm - 1330nm; the third upstream optical transmitter 73 is used to transmit the upstream optical signal of XGPON, with the third wavelength range being 1260nm - 1280nm; the first downstream optical receiver 81 is used to receive the downstream optical signal of 50GPON, with the fourth wavelength range being 1340nm - 1344nm; the second downstream optical receiver 82 is used to receive the downstream optical signal of GPON, with the fifth wavelength range being 1480nm - 1500nm; the third downstream optical receiver 83 is used to receive the downstream optical signal of XGPON, with the sixth wavelength range being 1575nm - 1577nm. In this way, the coexistence and wavelength division multiplexing of the three generations of technologies of G-PON, XG-PON, and 50G-PON are achieved.
[0054] Further, please refer to Figures 3 to 5 , in an embodiment of the present utility model, the wavelength division multiplexing component 2 includes a wavelength division multiplexing prism 21, a beam splitting filter 22, a first high reflection filter 231, a first downstream optical filter 241, a second downstream optical filter 242, and a third downstream optical filter 243. A first working layer 2a and a second working layer 2b are formed on the wavelength division multiplexing prism 21; both the first downstream optical filter 241 and the second downstream optical filter 242 are disposed on the side of the wavelength division multiplexing prism 21 facing away from the corner prism 3 and are located in the first working layer 2a, and the beam splitting filter 22, the first high reflection filter 231, and the third downstream optical filter 243 are all disposed on the side of the wavelength division multiplexing prism 21 facing the corner prism 3 and are located in the first working layer 2a; after the downstream optical signal emitted by the main optical path transceiver 6 enters the wavelength division multiplexing prism 21, it sequentially passes through the beam splitting filter 22, the second downstream optical filter 242, the first high reflection filter 231, the first downstream optical filter 241, and the third downstream optical filter 243; the beam splitting filter 22 allows the optical signals in the first wavelength range, the second wavelength range, and the third wavelength range to pass through, the first downstream optical filter 241 allows the optical signal in the fourth wavelength range to pass through, the second downstream optical filter 242 allows the optical signal in the fifth wavelength range to pass through, and the third downstream optical filter 243 allows the optical signal in the sixth wavelength range to pass through.
[0055] In this embodiment, the cross-sectional shape of the wavelength division multiplexing prism 21 is a quadrangular prism with a parallelogram shape. When the wavelength division multiplexing prism 21 is disposed in the bottom case 11, the upstream optical transmitter assembly 7 and the downstream optical receiver assembly 8 are respectively installed on two mutually parallel side walls of the bottom case 11, and the above two side walls are parallel to two faces of the wavelength division multiplexing prism 21. Among the remaining two faces, one faces the corner prism 3 and the other faces the main optical path transceiver 6.
[0056] The first downward optical filter 241 and the second downward optical filter 242 are sequentially arranged on the side of the wavelength division multiplexing prism 21 facing the main optical path transceiver 6 along the direction from the downward optical receiving component 8 to the upward optical transmitting component 7 and are located in the first working layer 2a. The beam splitting filter 22, the first high reflection filter 231, and the third downward optical filter 243 are sequentially arranged on the side of the wavelength division multiplexing prism 21 facing the corner prism 3 along the direction from the upward optical transmitting component 7 to the downward optical receiving component 8 and are located in the first working layer 2a.
[0057] Please refer to Figures 8 to 9 , the downward optical path in the wavelength division multiplexing component 2 is as follows: The downward optical signal emitted by the main optical path transceiver 6 passes through the first working layer 2a and reaches the beam splitting filter 22. The beam splitting filter 22 reflects the optical signal in the wavelength range of 1340 nm to 1580 nm to the second downward optical filter 242, and the second downward filter allows the optical signal in the wavelength range of 1480 nm to 1500 nm to pass through the wavelength division multiplexing prism 21; the second downward optical filter 242 reflects the optical signal in the remaining wavelength range to the first high reflection filter 231. After the direction is adjusted by the first high reflection filter 231, the downward optical signal reaches the first downward optical filter 241. The first downward optical filter 241 allows the optical signal in the wavelength range of 1340 nm to 1344 nm to pass through the wavelength division multiplexing prism 21. The first downward optical filter 241 reflects the optical signal in the remaining wavelength range to the third high reflection filter 233. The third downward optical filter 243 allows the optical signal in the wavelength range of 1575 nm to 1580 nm to pass through the wavelength division multiplexing prism 21, thus realizing the demultiplexing of the downward optical signal.
[0058] Furthermore, please refer to Figures 3 to 5, in combination with the previous embodiment, in an embodiment of the present invention, the wavelength division multiplexing component 2 further includes a first upstream optical filter 251, a second upstream optical filter 252, a third upstream optical filter 253, a second high reflection filter 232, and a third high reflection filter 233; the first upstream optical filter 251, the second upstream optical filter 252, and the second high reflection filter 232 are all disposed on the side of the wavelength division multiplexing prism 21 facing away from the corner prism 3 and are located in the second working layer 2b, and the third upstream optical filter 253 and the third high reflection filter 233 are both disposed on the side of the wavelength division multiplexing prism 21 facing the corner prism 3 and are located in the second working layer 2b; after the optical signal emitted by the first upstream optical transmitter 71 passes through the first upstream optical filter 251 and enters the wavelength division multiplexing prism 21, it sequentially passes through the third upstream optical filter 253, the second upstream optical filter 252, the third high reflection filter 233, and the second high reflection filter 232 and then transmits out of the second working layer 2b to the corner prism 3; after the optical signal emitted by the second upstream optical transmitter 72 passes through the second upstream optical filter 252 and enters the wavelength division multiplexing prism 21, it multiplexes with the upstream optical signal emitted by the first upstream optical transmitter 71, and after the optical signal emitted by the third upstream optical transmitter 73 passes through the third upstream optical filter 253 and enters the wavelength division multiplexing prism 21, it multiplexes with the upstream optical signal emitted by the first upstream optical transmitter 71; the corner prism 3 reflects the multiplexed optical signal to the beam splitting filter 22, and sequentially transmits through the beam splitting filter 22 and the first working layer 2a and enters the main optical path transceiver 6.
[0059] In this embodiment, the first upstream optical filter 251, the second upstream optical filter 252, and the second high reflection filter 232 are sequentially disposed on the side of the wavelength division multiplexing prism 21 facing the main optical path transceiver 6 and are located in the second working layer 2b along the direction from the upstream optical transmitter assembly 7 to the downstream optical receiver assembly 8, and the third upstream optical filter 253 and the third high reflection filter 233 are sequentially disposed on the side of the wavelength division multiplexing prism 21 facing the corner prism 3 and are located in the second working layer 2b along the direction from the upstream optical transmitter assembly 7 to the downstream optical receiver assembly 8.
[0060] Please refer to Figures 6 to 7, the downlink optical path in the wavelength division multiplexing component 2 is as follows: In the second working layer 2b, the optical signal emitted by the first transmitting component passes through the first upstream optical filter 251. The first upstream optical filter 251 allows optical signals in the wavelength range of 1284 nm to 1288 nm to penetrate into the wavelength division multiplexing prism 21. After the optical signals in the wavelength range of 1284 nm to 1288 nm penetrate into the wavelength division multiplexing prism 21, they are reflected by the third upstream optical filter 253, the second upstream optical filter 252, the third high-reflection filter 233, and the second high-reflection filter 232 in sequence, and then penetrate out of the second working layer 2b and reach the corner prism 3. The corner prism 3 reflects it to the beam splitting filter 22, and then passes through the beam splitting filter 22 and the first working layer 2a in sequence and enters the main optical path transceiver 6. The optical signal emitted by the second transmitting component passes through the second upstream optical filter 252. The second upstream optical filter 252 allows optical signals in the wavelength range of 1290 nm to 1330 nm to penetrate into the wavelength division multiplexing prism 21 and perform wavelength multiplexing with the optical signal emitted by the first transmitting component. A third upstream optical reflector 43 is provided on the outgoing optical path of the third transmitting component. The third upstream optical reflector 43 reflects the optical signal emitted by the third transmitting component to the third upstream optical filter 253. The third upstream optical filter 253 allows optical signals in the wavelength range of 1260 nm to 1280 nm to penetrate into the wavelength division multiplexing prism 21 and perform wavelength multiplexing with the optical signal emitted by the first transmitting component. In this way, the wavelength multiplexing of the upstream optical signals is achieved.
[0061] Furthermore, please refer to Figure 2 , in combination with the previous embodiment, in an embodiment of the present invention, the upstream optical reflection component 4 includes a first upstream optical reflector 41, a second upstream optical reflector 42, and a third upstream optical reflector 43, and the downstream optical reflection component 5 includes a first downstream optical reflector 51, a second downstream optical reflector 52, and a third downstream optical reflector 53; the first upstream optical reflector 41 reflects the optical signal emitted by the first upstream optical transmitter 71 to the first upstream optical filter 251, the second upstream optical reflector 42 reflects the optical signal emitted by the second upstream optical transmitter 72 to the second upstream optical filter 252, and the third upstream optical reflector 43 reflects the optical signal emitted by the third upstream optical transmitter 73 to the third upstream optical filter 253; the first downstream optical reflector 51 reflects the optical signal transmitted by the first downstream optical filter 241 to the first downstream optical receiver 81, the second downstream optical reflector 52 reflects the optical signal transmitted by the second downstream optical filter 242 to the second downstream optical receiver 82, and the third downstream optical reflector 53 reflects the optical signal transmitted by the third downstream optical filter 243 to the third downstream optical receiver 83.
[0062] In this embodiment, a first upward light reflector 41 is provided on the outgoing optical path of the first transmitting component. The first upward light reflector 41 reflects the optical signal emitted by the first transmitting component to the first upward optical filter 251. A second upward light reflector 42 is provided on the outgoing optical path of the second transmitting component. The second upward light reflector 42 reflects the optical signal emitted by the second transmitting component to the second upward optical filter 252. A third upward light reflector 43 is provided on the outgoing optical path of the third transmitting component. The third upward light reflector 43 reflects the optical signal emitted by the third transmitting component to the third upward optical filter 253. Since the downstream light receiving component 8 is provided on a side wall of the bottom case 11, the adjustment of the downstream optical path is realized. By adjusting the angle and position of the downstream light reflecting component 5, the downstream optical signals can be made parallel to each other when passing through the bottom case 11, so as to optimize the optical path and reduce the space occupation.
[0063] A first downward light reflector 51 is provided on the transmission optical path of the first downward optical filter. The first downward light reflector 51 reflects the optical signal in the wavelength range of 1340 nm to 1344 nm to the first downward light receiver 81. A second downward light reflector 52 is provided on the transmission optical path of the second downward optical filter. The second downward light reflector 52 reflects the optical signal in the wavelength range of 1480 nm - 1500 nm to the second downward light receiver 82. A third downward light reflector 53 is provided on the transmission optical path of the third downward optical filter. The third downward light reflector 53 reflects the optical signal in the wavelength range of 1575 nm to 1580 nm to the third downward light receiver 83. Since the upstream light transmitting component 7 is provided on another side wall of the bottom case 11, in this way, the upstream light can be set to enter the bottom case 11 in parallel. By adjusting the angle and position of the upstream light reflecting component 4, the parallel upstream optical signals can be guided to different optical filters to penetrate into the wavelength division multiplexing prism 21 for multiplexing, optimizing the optical path and reducing the space occupation.
[0064] Specifically, in order to simplify the design and manufacturing process of photodetectors, laser emitters, and other optical communication components, please refer to Figure 6 and Figure 8 , in an embodiment of the present utility model, the first upstream light emitter 71 is used to emit an optical signal with a wavelength of 1286 nm, the second upstream light emitter 72 is used to emit an optical signal with a wavelength of 1310 nm, and the third upstream light emitter 73 is used to emit an optical signal with a wavelength of 1270 nm. The first downstream light receiver 81 is used to receive an optical signal with a wavelength of 1342 nm, the second downstream light receiver 82 is used to receive an optical signal with a wavelength of 1490 nm, and the third downstream light receiver 83 is used to receive an optical signal with a wavelength of 1577 nm. In addition to achieving the above purposes, using a single wavelength can also ensure better compatibility between devices from different suppliers, which helps to simplify network deployment and maintenance without worrying about wavelength matching problems between different devices.
[0065] Specifically, please refer to Figure 7 , in an embodiment of the present utility model, the corner prism 3 has two mutually perpendicular reflecting surfaces. In this embodiment, the corner prism 3 is a cuboid prism. A trapezoidal groove is provided on one side of the cuboid prism surface facing the wavelength division multiplexing prism 21. The two inclined surfaces of the trapezoidal groove are perpendicular to each other, forming a first reflecting surface 31 and a second reflecting surface 32. It should be noted that in this embodiment, considering the convenience of processing and installation, the shape of the corner prism 3 is a cuboid. The corner prism 3 can also be in the shape of a cube, etc. The trapezoidal groove can also be replaced with a V-shaped groove, etc., as long as it has two mutually perpendicular reflecting surfaces. This embodiment is only an exemplary example and should not be construed as a limitation to the technical solution.
[0066] Specifically, in order to avoid interference between the received signal and the transmitted signal, please refer to Figure 6 and Figure 8 , in an embodiment of the present utility model, the upstream optical transmitting component 7 and the downstream optical receiving component 8 are arranged on two opposite side walls of the housing 1 facing each other. In addition to achieving the above purpose, arranging the upstream optical transmitting component 7 and the downstream optical receiving component 8 on two opposite side walls of the housing 1 facing each other also makes the internal optical path structure symmetrically distributed about the main optical path, which helps to simplify the circuit design and assembly process, and has a compact structure, smaller size, and is easier to achieve sealing during overall packaging.
[0067] Furthermore, please refer to Figure 1 , in an embodiment of the present utility model, the 50G PON wavelength division multiplexing passive optical device 1000 adopts a Z-block packaging method. In this embodiment, the bottom wall of the bottom shell 11 is provided with grooves adapted to the wavelength division multiplexing prism 21, the corner prism 3, the upstream optical reflecting component 4, and the downstream optical reflecting component 5 for installing and fixing the above optical devices in the bottom shell 11. The installation hook groove and the sealing ring hook groove of the top cover 12 are provided at the notch of the packaging groove of the bottom shell 11 for closing the bottom shell 11 and meeting the airtightness requirements. The wavelength division multiplexing prism 21 and the filter are pre-assembled before being loaded into the bottom shell 11. During assembly, the pre-assembled optical devices are placed into the corresponding grooves in the bottom shell 11, and then the sealing ring and the top cover 12 are loaded. The mechanical fixation of the top cover 12 and the bottom shell 11 is achieved by means of bolts or buckles, etc. Compared with the traditional in-line coupling method, the installation difficulty is simplified.
[0068] Please refer to Figure 1, in an embodiment of the present utility model, the main optical path transceiver 6, the upstream optical transmission component 7 and the downstream optical reception component 8 are collimators. These collimators all adopt high-precision optical designs, which can convert the emitted optical signals into parallel light, or convert the received parallel optical signals into focused light. The design of the collimator includes one or more lenses and mirrors, and these lenses and mirrors are manufactured through precise optical processing and coating processes to ensure the transmission quality and efficiency of optical signals.
[0069] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A 50G PON wavelength division multiplexing passive optical device, characterized in that, The 50G PON wavelength division multiplexing passive optical device includes a housing (1), a wavelength division multiplexing component (2), a corner prism (3), an upstream optical reflection component (4), and a downstream optical reflection component (5). A main optical path transceiver (6), an upstream optical emission component (7), and a downstream optical reception component (8) are provided on the housing (1). The wavelength division multiplexing component (2), the corner prism (3), the upstream optical reflection component (4), and the downstream optical reflection component (5) are all encapsulated in the housing (1). The wavelength division multiplexing component (2) is located between the corner prism (3) and the main optical path transceiver (6). The wavelength division multiplexing component (2) has a first working layer (2a) and a second working layer (2b). After the downstream optical signal emitted by the main optical path transceiver (6) enters the first working layer (2a), it is demultiplexed by the first working layer (2a) and then transmitted to the downstream optical reflection component (5). The downstream optical reflection component (5) reflects the demultiplexed downstream optical signal to the downstream optical reception component (8). The upstream optical signal emitted by the upstream optical emission component (7) is reflected by the upstream optical reflection component (4) to the second working layer (2b). The second working layer (2b) multiplexes the upstream optical signal. The corner prism (3) reflects the multiplexed upstream optical signal to the first working layer (2a) and transmits through the first working layer (2a) to enter the main optical path transceiver (6).
2. The 50 GPON wavelength division multiplexing passive optical device according to claim 1, characterized in that, The upstream optical emission component (7) includes a first upstream optical emitter (71), a second upstream optical emitter (72), and a third upstream optical emitter (73). The first upstream optical emitter (71) is used to emit optical signals in a first wavelength range. The second upstream optical emitter (72) is used to emit optical signals in a second wavelength range. The third upstream optical emitter (73) is used to emit optical signals in a third wavelength range. The downstream optical reception component (8) includes a first downstream optical receiver (81), a second downstream optical receiver (82), and a third downstream optical receiver (83). The first downstream optical receiver (81) is used to receive optical signals in a fourth wavelength range. The second downstream optical receiver (82) is used to receive optical signals in a fifth wavelength range. The third downstream optical receiver (83) is used to receive optical signals in a sixth wavelength range.
3. The 50 GPON wavelength division multiplexing passive optical device according to claim 2, characterized in that The wavelength division multiplexing component (2) includes a wavelength division multiplexing prism (21), a beam splitting filter (22), a first high reflection filter (231), a first downstream optical filter (241), a second downstream optical filter (242), and a third downstream optical filter (243). The first working layer (2a) and the second working layer (2b) are formed on the wavelength division multiplexing prism (21). Both the first downward optical filter (241) and the second downward optical filter (242) are provided on the side of the wavelength division multiplexing prism (21) facing away from the corner prism (3) and are located in the first working layer (2a), and the beam splitting filter (22), the first high reflection filter (231), and the third downward optical filter (243) are all provided on the side of the wavelength division multiplexing prism (21) facing the corner prism (3) and are located in the first working layer (2a); After the downward optical signal emitted by the main optical path transceiver (6) enters the wavelength division multiplexing prism (21), it sequentially passes through the beam splitting filter (22), the second downward optical filter (242), the first high reflection filter (231), the first downward optical filter (241), and the third downward optical filter (243); The beam splitting filter (22) allows optical signals in the first wavelength range, the second wavelength range, and the third wavelength range to pass through, the first downward optical filter (241) allows optical signals in the fourth wavelength range to pass through, the second downward optical filter (242) allows optical signals in the fifth wavelength range to pass through, and the third downward optical filter (243) allows optical signals in the sixth wavelength range to pass through.
4. The 50GPON wavelength division multiplexing passive optical device according to claim 3, characterized in that, The wavelength division multiplexing component (2) further includes a first upward optical filter (251), a second upward optical filter (252), a third upward optical filter (253), a second high reflection filter (232), and a third high reflection filter (233); The first upward optical filter (251), the second upward optical filter (252), and the second high reflection filter (232) are all provided on the side of the wavelength division multiplexing prism (21) facing away from the corner prism (3) and are located in the second working layer (2b), and the third upward optical filter (253) and the third high reflection filter (233) are both provided on the side of the wavelength division multiplexing prism (21) facing the corner prism (3) and are located in the second working layer (2b); After the optical signal emitted by the first upward optical emitter (71) passes through the first upward optical filter (251) and enters the wavelength division multiplexing prism (21), it sequentially passes through the third upward optical filter (253), the second upward optical filter (252), the third high reflection filter (233), and the second high reflection filter (232) and then transmits out of the second working layer (2b) to the corner prism (3); After the optical signal emitted by the second upward optical emitter (72) passes through the second upward optical filter (252) and enters the wavelength division multiplexing prism (21), it is multiplexed with the upward optical signal emitted by the first upward optical emitter (71), and after the optical signal emitted by the third upward optical emitter (73) passes through the third upward optical filter (253) and enters the wavelength division multiplexing prism (21), it is multiplexed with the upward optical signal emitted by the first upward optical emitter (71); The corner prism (3) reflects the multiplexed optical signal to the beam splitting filter (22), and the optical signal sequentially passes through the beam splitting filter (22) and the first working layer (2a) and enters the main optical path transceiver (6).
5. The 50 GPON wavelength division multiplexing passive optical device according to claim 4, characterized in that, The upstream optical reflection component (4) includes a first upstream optical reflector (41), a second upstream optical reflector (42), and a third upstream optical reflector (43), and the downstream optical reflection component (5) includes a first downstream optical reflector (51), a second downstream optical reflector (52), and a third downstream optical reflector (53); The first upstream optical reflector (41) reflects the optical signal emitted by the first upstream optical transmitter (71) to the first upstream optical filter (251), the second upstream optical reflector (42) reflects the optical signal emitted by the second upstream optical transmitter (72) to the second upstream optical filter (252), and the third upstream optical reflector (43) reflects the optical signal emitted by the third upstream optical transmitter (73) to the third upstream optical filter (253); The first downstream optical reflector (51) reflects the optical signal transmitted through the first downstream optical filter (241) to the first downstream optical receiver (81), the second downstream optical reflector (52) reflects the optical signal transmitted through the second downstream optical filter (242) to the second downstream optical receiver (82), and the third downstream optical reflector (53) reflects the optical signal transmitted through the third downstream optical filter (243) to the third downstream optical receiver (83).
6. The 50GPON wavelength division multiplexing passive optical device according to claim 2, characterized in that, The first upstream optical transmitter (71) is used to emit an optical signal with a wavelength of 1286 nm, the second upstream optical transmitter (72) is used to emit an optical signal with a wavelength of 1310 nm, and the third upstream optical transmitter (73) is used to emit an optical signal with a wavelength of 1270 nm; The first downstream optical receiver (81) is used to receive an optical signal with a wavelength of 1342 nm, the second downstream optical receiver (82) is used to receive an optical signal with a wavelength of 1490 nm, and the third downstream optical receiver (83) is used to receive an optical signal with a wavelength of 1577 nm.
7. The 50 GPON wavelength division multiplexing passive optical device according to any one of claims 1 to 6, characterized in that, The corner prism (3) has two mutually perpendicular reflecting surfaces.
8. The 50 GPON wavelength division multiplexing passive optical device according to any one of claims 1 to 6, characterized in that, The upstream optical transmitting component (7) and the downstream optical receiving component (8) are arranged on opposite side walls of the housing (1).
9. The 50GPON wavelength division multiplexing passive optical device according to any one of claims 1 to 6, characterized in that The 50G PON wavelength division multiplexing passive optical device adopts a Z-block packaging method.
10. The 50 GPON wavelength division multiplexing passive optical device according to any one of claims 1 to 6, characterized in that The main optical path transceiver (6), the upstream optical transmitting component (7), and the downstream optical receiving component (8) are collimators.