50GPON wavelength division multiplexing passive optical device

Abstract

The invention provides a 50GPON wavelength division multiplexing passive optical device, and relates to the technical field of optical communication, the 50GPON wavelength division multiplexing passive optical device comprises a housing, a wavelength division multiplexing assembly, a corner prism, an uplink light reflection assembly and a downlink light reflection assembly, the housing is provided with a main light path transceiver, an uplink light emitting assembly and a downlink light receiving assembly, the wavelength division multiplexing assembly is provided with two working layers, and the main light path transceiver is provided with a main light path. One is used for demultiplexing, and the other is used for multiplexing. The corner prism realizes transmission of optical signals between the two working layers, and uplink optical signals emitted by the uplink optical emission assembly sequentially pass through the uplink optical reflection assembly, the second working layer, the corner prism, the first working layer and the main optical path transceiver. According to the wavelength division multiplexing module, the downlink optical signal sent by the main optical path transceiver sequentially passes through the first working layer, the downlink optical reflection assembly and the downlink optical receiving assembly, so that wavelength combination and demultiplexing of uplink and downlink optical signals are completed only through one wavelength division multiplexing assembly, the space occupation of the wavelength division multiplexing module is reduced, and the applicability of the wavelength division multiplexing module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical communications, and in particular to a 50GPON wavelength division multiplexing passive optical device. Background Art

[0002] With the progress of society and the explosive growth of information, especially the advent of the big data era, people's requirements for broadband access speed are increasing. The 100M broadband service provided by the traditional Gigabit Passive Optical Network (GPON) has gradually failed to meet the needs of users. To this end, operators have upgraded their networks to 10GPON (also known as XGPON) systems. Driven by industrial development, 50GPON is gradually becoming the development direction of the next generation PON network. However, since home users do not have an urgent need for bandwidth upgrades, GPON and 10GPON 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 50GPON systems in the future. In this context, G-PON, XG-PON, and 50G-PON three generations of optical components may coexist, which requires the use of wavelength division multiplexing (WDM) technology to combine and demultiplex the wavelengths of upstream and downstream optical signals of GPON, XGPON, and 50GPON.

[0003] The multiplexing technology is to combine optical signals of different wavelengths by 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 multiple optical signals combined by the combiner in the WDM system, that is, the reverse operation of the multiplexing process, which is usually achieved by a demultiplexer. The purpose of demultiplexing is to restore the combined optical signals of different wavelengths to the original multiple optical signals so that they can be independently processed or transmitted later.

[0004] In the relevant deployment, the need to set up a combiner and a splitter separately leads to the problem of 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 while ensuring performance has become an urgent problem to be solved. Summary of the invention

[0005] The main purpose of the present invention is to propose a 50GPON 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-mentioned purpose, the 50GPON wavelength division multiplexing passive optical device proposed in the present invention includes a housing, a wavelength division multiplexing component, a corner prism, an upstream light reflection component and a downstream light reflection component, wherein the housing is provided with a main optical path transceiver, an upstream light transmitting component and a downstream light receiving component; the wavelength division multiplexing component, the corner prism, the upstream light reflection component and the downstream light reflection component are all encapsulated in the housing, and 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 downlink optical signal emitted by the main optical path transceiver enters the first working layer, it is demultiplexed by the first working layer and transmitted to the downlink optical reflecting component, and the downlink optical reflecting component reflects the demultiplexed downlink optical signal to the downlink optical receiving component; the uplink optical signal emitted by the uplink optical transmitting component is reflected by the uplink optical reflecting component to the second working layer, and the second working layer combines the uplink optical signal, and the corner prism reflects the combined uplink optical signal to the first working layer and transmits the first working layer to enter the main optical path transceiver.

[0007] In one embodiment, the uplink optical transmitting component includes a first uplink optical transmitting element, a second uplink optical transmitting element and a third uplink optical transmitting element, the first uplink optical transmitting element is used to emit an optical signal in a first wavelength range, the second uplink optical transmitting element is used to emit an optical signal in a second wavelength range, and the third uplink optical transmitting element is used to emit an optical signal in a third wavelength range; the downlink optical receiving component includes a first downlink optical receiving element, a second downlink optical receiving element and a third downlink optical receiving element, the first downlink optical receiving element is used to receive an optical signal in a fourth wavelength range, the second downlink optical receiving element is used to receive an optical signal in a fifth wavelength range, and the third downlink optical receiving element 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 spectroscopic filter, a first high reflection filter, a first downstream optical filter, a second downstream optical filter and a third downstream optical filter, and the first working layer and the second working layer are formed on the wavelength division multiplexing prism; the first downstream optical filter and the second downstream optical filter are both arranged on the side of the wavelength division multiplexing prism facing away from the corner prism and are located in the first working layer, and the spectroscopic filter, the first high reflection filter and the third downstream optical filter are all arranged on the side of the wavelength division multiplexing prism facing the corner prism and are located The first working layer; the downlink optical signal emitted by the main optical path transceiver enters the wavelength division multiplexing prism and then passes through the spectroscopic filter, the second downlink optical filter, the first high reflection filter, the first downlink optical filter and the third downlink optical filter in sequence; the spectroscopic filter allows optical signals in the first wavelength range, the second wavelength range and the third wavelength range to pass through, the first downlink optical filter allows optical signals in the fourth wavelength range to pass through, the second downlink optical filter allows optical signals in the fifth wavelength range to pass through, and the third downlink optical filter allows optical signals in the sixth wavelength range to pass through.

[0009] In one embodiment, the wavelength division multiplexing component further includes a first upstream optical filter, a second upstream optical filter, a third upstream optical filter, a second high reflection filter and a third high reflection filter; the first upstream optical filter, the second upstream optical filter and the second high reflection filter are all arranged on the side of the wavelength division multiplexing prism facing away from the corner prism and located in the second working layer, the third upstream optical filter and the third high reflection filter are both arranged on the side of the wavelength division multiplexing prism facing the corner prism and located in the second working layer; after the optical signal emitted by the first upstream optical transmitter enters the wavelength division multiplexing prism through the first upstream optical filter, it passes through the third upstream optical filter in sequence. , the second uplink optical filter, the third high-reflection filter and the second high-reflection filter and transmit out of the second working layer to the corner prism; the optical signal emitted by the second uplink optical transmitter passes through the second uplink optical filter and enters the wavelength division multiplexing prism, and is then combined with the uplink optical signal emitted by the first uplink optical transmitter; the optical signal emitted by the third uplink optical transmitter passes through the third uplink optical filter and enters the wavelength division multiplexing prism, and is then combined with the uplink optical signal emitted by the first uplink optical transmitter; the corner prism reflects the combined optical signal to the spectroscopic filter, and sequentially transmits the spectroscopic filter and the first working layer to enter the main optical path transceiver.

[0010] In one embodiment, the uplink light reflecting component includes a first uplink light reflecting element, a second uplink light reflecting element and a third uplink light reflecting element, and the downlink light reflecting component includes a first downlink light reflecting element, a second downlink light reflecting element and a third downlink light reflecting element; the first uplink light reflecting element reflects the light signal emitted by the first uplink light emitting element to the first uplink light filter, the second uplink light reflecting element reflects the light signal emitted by the second uplink light emitting element to the second uplink light filter, and the third uplink light reflecting element reflects the light signal emitted by the third uplink light emitting element to the third uplink light filter; the first downlink light reflecting element reflects the light signal transmitted by the first downlink light filter to the first downlink light receiving element, the second downlink light reflecting element reflects the light signal transmitted by the second downlink light filter to the second downlink light receiving element, and the third downlink light reflecting element reflects the light signal transmitted by the third downlink light filter to the third downlink light receiving element.

[0011] In one embodiment, the first uplink optical transmitter is used to emit an optical signal with a wavelength of 1286nm, the second uplink optical transmitter is used to emit an optical signal with a wavelength of 1310nm, and the third uplink optical transmitter is used to emit an optical signal with a wavelength of 1270nm; the first downlink optical receiver is used to receive an optical signal with a wavelength of 1342nm, the second downlink optical receiver is used to receive an optical signal with a wavelength of 1490nm, and the third downlink optical receiver is used to receive an optical signal with a wavelength of 1577nm.

[0012] In one embodiment, the corner prism has two mutually perpendicular reflection surfaces.

[0013] In one embodiment, the uplink optical transmitting component and the downlink optical receiving component are disposed on two opposite side walls of the housing.

[0014] In one implementation, the 50GPON wavelength division multiplexing passive optical device is packaged in a Z-block manner.

[0015] In one embodiment, the main optical path transceiver, the uplink optical transmitting component and the downlink optical receiving component are collimators.

[0016] The 50GPON wavelength division multiplexing passive optical device of the present invention includes a shell, a wavelength division multiplexing component, a corner prism, an uplink light reflection component and a downlink light reflection component. The shell is provided with a main optical path transceiver, an uplink light transmitting component and a downlink light receiving 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 combining. The corner prism realizes the transmission of optical signals between the second working layer and the first working layer. The uplink light signal emitted by the uplink light transmitting component passes through the uplink light reflection component, the second working layer, the corner prism, the first working layer and the main optical path transceiver in sequence. The downlink light signal emitted by the main optical path transceiver passes through the first working layer, the downlink light reflection component and the downlink light receiving component in sequence. In this way, the wavelength combining and demultiplexing of the uplink and downlink optical signals can be completed by only one wavelength division multiplexing component, thereby achieving the beneficial effects of reducing the space occupation of 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 embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of an embodiment of a 50GPON wavelength division multiplexing passive optical device provided by the present invention;

[0019] Figure 2 for Figure 1 A top view of the 50GPON wavelength division multiplexing passive optical device in the figure;

[0020] Figure 3 for Figure 2 Schematic diagram of the structure of the medium wavelength division multiplexing component;

[0021] Figure 4 for Figure 3 Elevation view from A-A' perspective;

[0022] Figure 5 for Figure 3 Elevation view from B-B' perspective;

[0023] Figure 6 for Figure 2 Schematic diagram of the uplink optical path of the 50GPON wavelength division multiplexing passive optical device;

[0024] Figure 7 for Figure 6 Schematic diagram of the upward light path of the C-C' section in FIG.

[0025] Figure 8 for Figure 6 Schematic diagram of the downstream optical path of the 50GPON wavelength division multiplexing passive optical device;

[0026] Fig. 9 for Figure 6 Schematic diagram of the downlink light path of the C-C' section in FIG.

[0027] Description of Figure Numbers:

[0028] 1000, 50GPON wavelength division multiplexing passive optical devices;

[0029] 1. Shell; 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. Spectral filter;

[0032] 231, a first high-reflection filter; 232, a second high-reflection filter; 233, a third high-reflection filter;

[0033] 241, a first downstream optical filter; 242, a second downstream optical filter; 243, a third downstream optical filter;

[0034] 251, a first uplink light filter; 252, a second uplink light filter; 253, a third uplink light filter;

[0035] 3. corner prism; 31. first reflection surface; 32. second reflection surface;

[0036] 4. Upward light reflecting assembly; 41. First upward light reflecting element; 42. Second upward light reflecting element; 43. Third upward light reflecting element;

[0037] 5. Downward light reflecting component; 51. First downward light reflecting component; 52. Second downward light reflecting component; 53. Third downward light reflecting component;

[0038] 6. Main optical path transceiver;

[0039] 7. Uplink optical emitting assembly; 71. First uplink optical emitting element; 72. Second uplink optical emitting element; 73. Third uplink optical emitting element;

[0040] 8. Downlink optical receiving component; 81. First downlink optical receiving element; 82. Second downlink optical receiving element; 83. Third downlink optical receiving element.

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention provides a 50GPON wavelength division multiplexing passive optical device 1000.

[0046] See also Figures 1 to 3In one embodiment of the present invention, the 50GPON wavelength division multiplexing passive optical device 1000 proposed by the present invention includes a housing 1, a wavelength division multiplexing component 2, a corner prism 3, an uplink light reflecting component 4 and a downlink light reflecting component 5, and the housing 1 is provided with a main optical path transceiver 6, an uplink light transmitting component 7, and a downlink light receiving component 8; the wavelength division multiplexing component 2, the corner prism 3, the uplink light reflecting component 4 and the downlink light reflecting 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 the second working layer 2b, after the downlink 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 transmitted to the downlink optical reflecting component 5, and the downlink optical reflecting component 5 reflects the demultiplexed downlink optical signal to the downlink optical receiving component 8; the uplink optical signal emitted by the uplink optical transmitting component 7 is reflected by the uplink optical reflecting component 4 to the second working layer 2b, and the second working layer 2b combines the uplink optical signal, and the corner prism 3 reflects the combined uplink optical signal to the first working layer 2a and transmits the first working layer 2a to enter the main optical path transceiver 6.

[0047] In this embodiment, the shell 1 includes a bottom shell 11 and a top cover 12. A box-shaped packaging groove is formed in the bottom shell 11. The wavelength division multiplexing component 2, the corner prism 3, the uplink light reflecting component 4 and the downlink light reflecting component 5 are all arranged in the packaging groove. The top cover 12 closes the notch of the packaging groove. The two opposite side walls of the bottom shell 11 are provided with through holes. The uplink light transmitting component 7 and the downlink light receiving component 8 are respectively arranged on the above-mentioned two opposite side walls and inserted into the through holes. The bottom shell 11 also has a side wall that is perpendicular to the above-mentioned two side walls. Similarly, the side wall also has a through hole in the center. The main optical path transceiver 6 is arranged on the side wall and inserted into the through hole. In this way, the uplink light transmitting component 7 and the downlink light receiving component 8 are symmetrical about the downlink light emitted by the main optical path transmitter.

[0048] The end of the main optical path transceiver 6 facing away from the bottom shell 11 is connected to the optical fiber, and is used to input the downlink optical signal in the optical fiber into the packaging slot, and receive the uplink light after the optical device in the packaging slot is combined, and output it to the optical fiber. Specifically, the main optical path transceiver 6 includes a collimator, which is plugged into the side wall of the bottom shell 11, and the end of the collimator away from the bottom shell 11 is connected to the optical fiber. Similarly, the uplink optical transmission component 7 includes at least one collimator, one end of the collimator is connected to the installation slot, and the other end is connected to the laser transmitter. The downlink optical receiving component includes at least one collimator, one end of the collimator is connected to the installation slot, and the other end is connected to the photodetector.

[0049] The upward light reflecting component 4 and the downward light reflecting component 5 use a reflecting prism or a reflecting plate. 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 surface of the triangular prism is a reflecting surface. Due to the characteristic of the triangular prism having two mutually perpendicular planes, it is convenient to locate in the packaging slot 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 parallel planes, and the filter is attached to the two planes. In the first working layer 2a, the downlink light is incident on the wavelength division multiplexing prism 21 at a certain angle with the two planes, and multiple reflections occur in the two planes. Different filters are set at each reflection point to transmit light signals of different wavelengths, so as to realize the wavelength division of the downlink light signal. The wavelength division multiplexing prism 21, the corner prism 3 and the main optical path transceiver 6 are located on the same straight line, the main optical path transceiver 6, the downlink light receiving component 8 and the first working layer 2a of the wavelength division multiplexing component are at the same horizontal height, and the uplink light reflecting 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 uplink light rays are incident on the wavelength division multiplexing prism 21 at a certain angle to the two planes, and different filters are set at the incident point to allow light signals of different wavelengths to be transmitted and enter. After multiple reflections in the two planes, they are normalized to the same exit point and emitted to the corner prism 3 at the same exit angle to realize the combination of the uplink light signals. The combined uplink light signals enter the first working layer 2a through the corner prism 3 and overlap with the downlink light path to achieve alignment with the main light path transceiver 6.

[0051] The 50GPON wavelength division multiplexing passive optical device 1000 of this embodiment includes a housing 1, a wavelength division multiplexing component 2, a corner prism 3, an uplink optical reflection component 4 and a downlink optical reflection component 5. The housing 1 is provided with a main optical path transceiver 6, an uplink optical transmitting component 7, and a downlink optical receiving component 8. 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 combining. The corner prism 3 realizes the transmission of optical signals between the second working layer 2b and the first working layer 2a. The uplink optical signal emitted by the uplink optical transmitting component 7 passes through the uplink optical reflection component 8 in sequence. 4, the second working layer 2b, the corner prism 3, the first working layer 2a and the main optical path transceiver 6. The downlink optical signal emitted by the main optical path transceiver 6 passes through the first working layer 2a, the downlink optical reflection component 5 and the downlink optical receiving component 8 in sequence. In this way, the wavelength combination and demultiplexing of the uplink and downlink optical signals can be completed only through one wavelength division multiplexing component 2, thereby achieving the beneficial effects of reducing the space occupation of 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, shortening the optical path length by half compared with the traditional "one-line" arrangement, improving the optical performance, and lowering the cost.

[0052] For further information, see Figure 1 In one embodiment of the present invention, the uplink optical transmitting component 7 includes a first uplink optical transmitting element 71, a second uplink optical transmitting element 72 and a third uplink optical transmitting element 73, the first uplink optical transmitting element 71 is used to emit an optical signal in a first wavelength range, the second uplink optical transmitting element 72 is used to emit an optical signal in a second wavelength range, and the third uplink optical transmitting element 73 is used to emit an optical signal in a third wavelength range; the downlink optical receiving component 8 includes a first downlink optical receiving element 81, a second downlink optical receiving element 82 and a third downlink optical receiving element 83, the first downlink optical receiving element 81 is used to receive an optical signal in a fourth wavelength range, the second downlink optical receiving element 82 is used to receive an optical signal in a fifth wavelength range, and the third downlink optical receiving element 83 is used to receive an optical signal 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, and the first wavelength range is 1284nm-1288nm. The second upstream optical transmitter 72 is used to transmit the upstream optical signal of GPON, and the second wavelength range is 1290nm-1330nm. The third upstream optical transmitter 73 is used to transmit the upstream optical signal of XGPON, and the third wavelength range is 1260nm-1280nm; the first downstream optical receiver 81 is used to receive the downstream optical signal of 50GPON, and the fourth wavelength range is 1340nm-1344nm. The second downstream optical receiver 82 is used to receive the downstream optical signal of GPON, and the fifth wavelength range is 1480nm-1500nm. The third downstream optical receiver 83 is used to receive the downstream optical signal of XGPON, and the sixth wavelength range is 1575nm-1577nm. In this way, the coexistence and wavelength division multiplexing of the three generations of G-PON, XG-PON and 50G-PON technologies are realized.

[0054] For further information, see Figures 3 to 5 In one embodiment of the present invention, the wavelength division multiplexing component 2 includes a wavelength division multiplexing prism 21, a spectroscopic 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; the first downstream optical filter 241 and the second downstream optical filter 242 are both arranged on a side of the wavelength division multiplexing prism 21 facing away from the corner prism 3 and are located on the first working layer 2a, and the spectroscopic filter 22, the first high reflection filter 231 and the third downstream optical filter 243 are all arranged on a side of the wavelength division multiplexing prism 21 facing the corner prism 3 and is located on one side of the first working layer 2a; after the downlink optical signal emitted by the main optical path transceiver 6 enters the wavelength division multiplexing prism 21, it passes through the spectroscopic filter 22, the second downlink optical filter 242, the first high reflection filter 231, the first downlink optical filter 241 and the third downlink optical filter 243 in sequence; the spectroscopic 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 downlink optical filter 241 allows the optical signal in the fourth wavelength range to pass through, the second downlink optical filter 242 allows the optical signal in the fifth wavelength range to pass through, and the third downlink 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 in the shape of a parallelogram. When the wavelength division multiplexing prism 21 is arranged in the bottom shell 11, the uplink light emitting component 7 and the downlink light receiving component 8 are respectively installed on the two mutually parallel side walls of the bottom shell 11. The above-mentioned two side walls are parallel to the two faces of the wavelength division multiplexing prism 21. Of the remaining two faces, one faces the corner prism 3, and the other faces the main optical path transceiver 6.

[0056] The first downstream optical filter 241 and the second downstream optical filter 242 are arranged in sequence on the side of the wavelength division multiplexing prism 21 facing the main optical path transceiver 6 along the direction from the downstream optical receiving component 8 to the upstream optical transmitting component 7 and are located in the first working layer 2a. The spectroscopic filter 22, the first high-reflection filter 231 and the third downstream optical filter 243 are arranged in sequence on the side of the wavelength division multiplexing prism 21 facing the corner prism 3 along the direction from the upstream optical transmitting component 7 to the downstream optical receiving component 8 and are located in the first working layer 2a.

[0057] See also Figures 8 to 9 , the downlink optical path in the wavelength division multiplexing component 2 is as follows: the downlink optical signal emitted by the main optical path transceiver 6 reaches the spectroscopic filter 22 through the first working layer 2a, the spectroscopic filter 22 reflects the optical signal in the wavelength range of 1340nm to 1580nm to the second downlink optical filter 242, and the second downlink filter allows the optical signal in the wavelength range of 1480nm to 1500nm to pass through the wavelength division multiplexing prism 21; the second downlink optical filter 242 reflects the optical signal in the remaining wavelength range to the first high reflection filter 231, and passes through After the first high-reflection filter 231 adjusts its direction, the downlink optical signal reaches the first downlink optical filter 241. The first downlink optical filter 241 allows the optical signal in the wavelength range of 1340nm to 1344nm to pass through the wavelength division multiplexing prism 21. The first downlink optical filter 241 reflects the optical signals in the remaining wavelength ranges to the third high-reflection filter 233. The third downlink optical filter 243 allows the optical signal in the wavelength range of 1575nm to 1580nm to pass through the wavelength division multiplexing prism 21, thereby achieving demultiplexing of the downlink optical signal.

[0058] For further information, see Figures 3 to 5In combination with the previous embodiment, in one 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 arranged on the side of the wavelength division multiplexing prism 21 facing away from the corner prism 3 and are located on the second working layer 2b, the third upstream optical filter 253 and the third high reflection filter 233 are all arranged on the side of the wavelength division multiplexing prism 21 facing the corner prism 3 and are located on the second working layer 2b; after the optical signal emitted by the first upstream optical emitting element 71 passes through the first upstream optical filter 251 and enters the wavelength division multiplexing prism 21, according to The optical signal 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 is transmitted through the second working layer 2b to the corner prism 3; the optical signal emitted by the second upstream optical transmitter 72 enters the wavelength division multiplexing prism 21 through the second upstream optical filter 252, and is then combined with the upstream optical signal emitted by the first upstream optical transmitter 71; the optical signal emitted by the third upstream optical transmitter 73 enters the wavelength division multiplexing prism 21 through the third upstream optical filter 253, and is then combined with the upstream optical signal emitted by the first upstream optical transmitter 71; the corner prism 3 reflects the combined optical signal to the spectroscopic filter 22, and the optical signal is sequentially transmitted through the spectroscopic filter 22 and the first working layer 2a to enter 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 arranged on the side of the wavelength division multiplexing prism 21 facing the main optical path transceiver 6 along the direction from the upstream optical transmitting component 7 to the downstream optical receiving component 8 and are located on the second working layer 2b, and the third upstream optical filter 253 and the third high-reflection filter 233 are sequentially arranged on the side of the wavelength division multiplexing prism 21 facing the corner prism 3 along the direction from the upstream optical transmitting component 7 to the downstream optical receiving component 8 and are located on the second working layer 2b.

[0060] See also Figure 6 to Figure 7The specific 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 uplink optical filter 251, and the first uplink optical filter 251 allows the optical signal with a wavelength range of 1284nm to 1288nm to penetrate the wavelength division multiplexing prism 21. After the optical signal with a wavelength range of 1284nm to 1288nm penetrates the wavelength division multiplexing prism 21, it passes through the third uplink optical filter 253, the second uplink optical filter 252, the third high reflection filter 233, and the second high reflection filter 232 in sequence, and then transmits out of the second working layer 2b and reaches the corner prism 3. The corner prism 3 reflects it to the spectroscopic filter 22, and then passes through the spectroscopic filter 22, the first working layer 2 a 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 the optical signal in the wavelength range of 1290nm to 1330nm to penetrate the wavelength division multiplexing prism 21, and is combined with the optical signal emitted by the first transmitting component, and a third upstream optical reflector 43 is provided on the output 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 the optical signal in the wavelength range of 1260nm to 1280nm to penetrate the wavelength division multiplexing prism 21, and is combined with the optical signal emitted by the first transmitting component, thereby realizing the combination of the upstream optical signal.

[0061] For further information, see Figure 2 In combination with the previous embodiment, in one embodiment of the present invention, the uplink light reflecting component 4 includes a first uplink light reflecting component 41, a second uplink light reflecting component 42 and a third uplink light reflecting component 43, and the downlink light reflecting component 5 includes a first downlink light reflecting component 51, a second downlink light reflecting component 52 and a third downlink light reflecting component 53; the first uplink light reflecting component 41 reflects the optical signal emitted by the first uplink light emitting component 71 to the first uplink light filter 251, and the second uplink light reflecting component 42 reflects the optical signal emitted by the second uplink light emitting component 72 to the second uplink light filter 251. The upstream optical filter 252, the third upstream optical reflecting element 43 reflects the optical signal emitted by the third upstream optical emitting element 73 to the third upstream optical filter 253; the first downstream optical reflecting element 51 reflects the optical signal transmitted by the first downstream optical filter 241 to the first downstream optical receiving element 81, the second downstream optical reflecting element 52 reflects the optical signal transmitted by the second downstream optical filter 242 to the second downstream optical receiving element 82, and the third downstream optical reflecting element 53 reflects the optical signal transmitted by the third downstream optical filter 243 to the third downstream optical receiving element 83.

[0062] In this embodiment, a first upward light reflector 41 is provided on the outgoing light path of the first transmitting assembly, and the first upward light reflector 41 reflects the optical signal emitted by the first transmitting assembly to the first upward light filter 251; a second upward light reflector 42 is provided on the outgoing light path of the second transmitting assembly, and the second upward light reflector 42 reflects the optical signal emitted by the second transmitting assembly to the second upward light filter 252; a third upward light reflector 43 is provided on the outgoing light path of the third transmitting assembly, and the third upward light reflector 43 reflects the optical signal emitted by the third transmitting assembly to the third upward light filter 253. Since the downlink optical receiving assembly 8 is provided on a side wall of the bottom shell 11, the adjustment of the downlink optical path is realized in this way. By adjusting the angle and position of the downlink optical reflector assembly 5, the downlink optical signals can be made parallel to each other when passing through the bottom shell 11, so as to optimize the optical path and reduce the space occupied.

[0063] A first downstream light reflector 51 is arranged on the transmission light path of the first downstream filter, and the first downstream light reflector 51 reflects the optical signal in the wavelength range of 1340nm to 1344nm to the first downstream light receiving element 81. A second downstream light reflector 52 is arranged on the transmission light path of the second downstream filter, and the second downstream light reflector 52 reflects the optical signal in the wavelength range of 1480nm-1500nm to the second downstream light receiving element 82. A third downstream light reflector 53 is arranged on the transmission light path of the third downstream filter, and the third downstream light reflector 53 reflects the optical signal in the wavelength range of 1575nm to 1580nm to the third downstream light receiving element 83. Since the upstream light transmitting assembly 7 is arranged on the other side wall of the bottom shell 11, the upstream light can be arranged to be incident into the bottom shell 11 in parallel with each other. By adjusting the angle and position of the upstream light reflector assembly 4, the upstream light signals in parallel with each other can be guided to different filters to penetrate into the wavelength division multiplexing prism 21 for wave combination, thereby optimizing the optical path and reducing space occupation.

[0064] Specifically, to simplify the design and manufacturing of photodetectors, laser transmitters, and other optical communication components, refer to Figure 6 and Figure 8 In one embodiment of the present invention, the first uplink optical transmitter 71 is used to emit an optical signal with a wavelength of 1286nm, the second uplink optical transmitter 72 is used to emit an optical signal with a wavelength of 1310nm, and the third uplink optical transmitter 73 is used to emit an optical signal with a wavelength of 1270nm; the first downlink optical receiver 81 is used to receive an optical signal with a wavelength of 1342nm, the second downlink optical receiver 82 is used to receive an optical signal with a wavelength of 1490nm, and the third downlink optical receiver 83 is used to receive an optical signal with a wavelength of 1577nm. In addition to achieving the above objectives, the use of a single wavelength can also ensure better compatibility between devices from different suppliers, which helps to simplify network deployment and maintenance without having to worry about wavelength matching issues between different devices.

[0065] Specifically, see Figure 7 In one embodiment of the present invention, the corner prism 3 has two mutually perpendicular reflection surfaces. In this embodiment, the corner prism 3 is a rectangular parallelepiped prism, and a trapezoidal groove is provided on one side of the rectangular parallelepiped prism 21. The two inclined surfaces of the trapezoidal groove are perpendicular to each other, forming a first reflection surface 31 and a second reflection surface 32. It should be noted that in this embodiment, considering the convenience of processing and installation, the corner prism 3 is in the shape of a rectangular parallelepiped. The corner prism 3 can also be in a cube or other shape, and the trapezoidal groove can also be replaced by a V-shaped groove or other shape that satisfies the requirements of having two mutually perpendicular reflection surfaces. This embodiment is only an illustrative example and should not be understood as a limitation on the technical solution.

[0066] Specifically, to avoid interference between the received and transmitted signals, refer to Figure 6 and Figure 8 In one embodiment of the present invention, the uplink optical transmitting assembly 7 and the downlink optical receiving assembly 8 are arranged on two opposite side walls of the housing 1. In addition to achieving the above-mentioned purpose, the uplink optical transmitting assembly 7 and the downlink optical receiving assembly 8 are arranged on two opposite side walls of the housing 1 in this embodiment, so that the internal optical path structure is symmetrically distributed about the main optical path, which helps to simplify the circuit design and assembly process, and the structure is compact and the size is smaller, and the sealing is easier to achieve when the overall package is packaged.

[0067] For further information, see Figure 1 In one embodiment of the present invention, the 50GPON 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 uplink light reflection component 4 and the downlink light reflection component 5, which are used to realize the installation and fixation of the above optical devices in the bottom shell 11. The notch of the packaging groove of the bottom shell 11 is provided with an installation hook groove and a sealing ring hook groove of the top cover 12, which are used to realize the closure of the bottom shell 11 and meet the airtightness requirements. The wavelength division multiplexing prism 21 and the filter are pre-assembled before being installed in the bottom shell 11. During assembly, the pre-assembled optical device is placed in the corresponding groove in the bottom shell 11, and then the sealing ring and the top cover 12 are installed. The mechanical fixation of the top cover 12 and the bottom shell 11 is realized by bolts or buckles. Compared with the traditional online coupling method, the installation difficulty is simplified.

[0068] See also Figure 1In one embodiment of the present invention, the main optical path transceiver 6, the uplink optical transmitting component 7 and the downlink optical receiving component 8 are collimators. These collimators all adopt high-precision optical design and can convert the transmitted optical signal into parallel light, or convert the received parallel light signal into focused light. The design of the collimator includes one or more lenses and reflectors, which are manufactured through precise optical processing and coating processes to ensure the transmission quality and efficiency of the optical signal.

[0069] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A 50GPON wavelength division multiplexing passive optical device, characterized in that: The 50GPON wavelength division multiplexing passive optical device comprises a housing (1), a wavelength division multiplexing component (2), a corner prism (3), an uplink light reflection component (4) and a downlink light reflection component (5); the housing (1) is provided with a main optical path transceiver (6), an uplink light transmitting component (7) and a downlink light receiving component (8); The wavelength division multiplexing component (2), the corner prism (3), the uplink light reflection component (4) and the downlink light 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 light path transceiver (6); The wavelength division multiplexing component (2) comprises a first working layer (2a) and a second working layer (2b); after the downlink 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 downlink optical reflection component (5); the downlink optical reflection component (5) reflects the demultiplexed downlink optical signal to the downlink optical receiving component (8); The uplink optical signal emitted by the uplink optical transmitting component (7) is reflected by the uplink optical reflecting component (4) to the second working layer (2b), the second working layer (2b) combines the uplink optical signal, and the corner prism (3) reflects the combined uplink optical signal to the first working layer (2a) and transmits the first working layer (2a) into the main optical path transceiver (6).

2. The 50GPON wavelength division multiplexing passive optical device according to claim 1, characterized in that: The uplink optical transmitting assembly (7) comprises a first uplink optical transmitting element (71), a second uplink optical transmitting element (72) and a third uplink optical transmitting element (73), wherein the first uplink optical transmitting element (71) is used to transmit an optical signal in a first wavelength range, the second uplink optical transmitting element (72) is used to transmit an optical signal in a second wavelength range, and the third uplink optical transmitting element (73) is used to transmit an optical signal in a third wavelength range; The downlink optical receiving component (8) comprises a first downlink optical receiving element (81), a second downlink optical receiving element (82) and a third downlink optical receiving element (83), wherein the first downlink optical receiving element (81) is used to receive optical signals in a fourth wavelength range, the second downlink optical receiving element (82) is used to receive optical signals in a fifth wavelength range, and the third downlink optical receiving element (83) is used to receive optical signals in a sixth wavelength range.

3. The 50GPON wavelength division multiplexing passive optical device as claimed in claim 2, characterized in that: The wavelength division multiplexing component (2) comprises a wavelength division multiplexing prism (21), a spectroscopic filter (22), a first high-reflection filter (231), a first downstream light filter (241), a second downstream light filter (242) and a third downstream light filter (243); the first working layer (2a) and the second working layer (2b) are formed on the wavelength division multiplexing prism (21); The first downstream optical filter (241) and the second downstream optical filter (242) are both arranged on the side of the wavelength division multiplexing prism (21) facing away from the corner prism (3) and are located on the first working layer (2a); the spectroscopic filter (22), the first high-reflection filter (231) and the third downstream optical filter (243) are all arranged on the side of the wavelength division multiplexing prism (21) facing the corner prism (3) and are located on the first working layer (2a); After the downlink optical signal emitted by the main optical path transceiver (6) enters the wavelength division multiplexing prism (21), it passes through the spectroscopic filter (22), the second downlink optical filter (242), the first high reflection filter (231), the first downlink optical filter (241), and the third downlink optical filter (243) in sequence; The spectroscopic filter (22) allows optical signals in a first wavelength range, a second wavelength range, and a third wavelength range to pass through, the first downstream optical filter (241) allows optical signals in a fourth wavelength range to pass through, the second downstream optical filter (242) allows optical signals in a fifth wavelength range to pass through, and the third downstream optical filter (243) allows optical signals in a sixth wavelength range to pass through.

4. The 50GPON wavelength division multiplexing passive optical device as claimed in claim 3, characterized in that: The wavelength division multiplexing component (2) further comprises a first uplink optical filter (251), a second uplink optical filter (252), a third uplink optical filter (253), a second high reflection filter (232) and a third high reflection filter (233); The first uplink light filter (251), the second uplink light filter (252) and the second high-reflection filter (232) are all arranged on the side of the wavelength division multiplexing prism (21) facing away from the corner prism (3) and are located on the second working layer (2b); the third uplink light filter (253) and the third high-reflection filter (233) are all arranged on the side of the wavelength division multiplexing prism (21) facing the corner prism (3) and are located on the second working layer (2b); After the optical signal emitted by the first uplink optical transmitter (71) passes through the first uplink optical filter (251) and enters the wavelength division multiplexing prism (21), it passes through the third uplink optical filter (253), the second uplink optical filter (252), the third high reflection filter (233) and the second high reflection filter (232) in sequence and is transmitted out of the second working layer (2b) to the corner prism (3); After the optical signal emitted by the second uplink optical transmitter (72) passes through the second uplink optical filter (252) and enters the wavelength division multiplexing prism (21), it is combined with the uplink optical signal emitted by the first uplink optical transmitter (71); after the optical signal emitted by the third uplink optical transmitter (73) passes through the third uplink optical filter (253) and enters the wavelength division multiplexing prism (21), it is combined with the uplink optical signal emitted by the first uplink optical transmitter (71); The corner prism (3) reflects the combined optical signal to the spectroscopic filter (22), and transmits the spectroscopic filter (22) and the first working layer (2a) in sequence to enter the main optical path transceiver (6).

5. The 50GPON wavelength division multiplexing passive optical device as claimed in claim 4, characterized in that: The uplink light reflecting assembly (4) comprises a first uplink light reflecting element (41), a second uplink light reflecting element (42) and a third uplink light reflecting element (43); the downlink light reflecting assembly (5) comprises a first downlink light reflecting element (51), a second downlink light reflecting element (52) and a third downlink light reflecting element (53); The first uplink light reflecting element (41) reflects the optical signal emitted by the first uplink light emitting element (71) to the first uplink light filter (251), the second uplink light reflecting element (42) reflects the optical signal emitted by the second uplink light emitting element (72) to the second uplink light filter (252), and the third uplink light reflecting element (43) reflects the optical signal emitted by the third uplink light emitting element (73) to the third uplink light filter (253); The first downstream light reflecting element (51) reflects the light signal transmitted by the first downstream light filter (241) to the first downstream light receiving element (81), the second downstream light reflecting element (52) reflects the light signal transmitted by the second downstream light filter (242) to the second downstream light receiving element (82), and the third downstream light reflecting element (53) reflects the light signal transmitted by the third downstream light filter (243) to the third downstream light receiving element (83).

6. The 50GPON wavelength division multiplexing passive optical device according to claim 2, characterized in that: The first uplink optical transmitter (71) is used to transmit an optical signal with a wavelength of 1286 nm, the second uplink optical transmitter (72) is used to transmit an optical signal with a wavelength of 1310 nm, and the third uplink optical transmitter (73) is used to transmit an optical signal with a wavelength of 1270 nm; The first downstream optical receiving element (81) is used for receiving an optical signal with a wavelength of 1342 nm, the second downstream optical receiving element (82) is used for receiving an optical signal with a wavelength of 1490 nm, and the third downstream optical receiving element (83) is used for receiving an optical signal with a wavelength of 1577 nm.

7. The 50GPON 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 reflection surfaces.

8. The 50GPON wavelength division multiplexing passive optical device according to any one of claims 1 to 6, characterized in that: The uplink light emitting component (7) and the downlink light receiving component (8) are arranged on two side walls of the housing (1) facing opposite directions.

9. The 50GPON wavelength division multiplexing passive optical device according to any one of claims 1 to 6, characterized in that: The 50GPON wavelength division multiplexing passive optical device adopts a Z-block packaging method.

10. The 50GPON 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 uplink optical transmission component (7) and the downlink optical reception component (8) are collimators.

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