Wavelength division multiplexer

Abstract

The utility model relates to a wavelength division multiplexer, which comprises a shell and a bracket, the support comprises a first plate body, a second plate body and a connecting column connecting the first plate body and the second plate body. A through hole and a penetrating hole are formed in the shell; a first interlayer spectroscope and a first spectroscope array are arranged on the first plate body, and a second interlayer spectroscope and a second spectroscope array are arranged on the second plate body; the first interlayer spectroscope can partially transmit incident light serving as a composite light beam to the first spectroscope array to form first emergent light, and can also partially reflect the incident light to the second interlayer spectroscope to form interlayer emergent light; the second interlayer spectroscope can at least partially reflect the interlayer emergent light to the second spectroscope array to form second emergent light; the first spectroscope array can separate the first emergent light into first emergent sub-beams which are emitted to the corresponding through holes and serve as sub-beams; the second spectroscope array can separate the second emergent light into second emergent sub-beams which are emitted to the corresponding through holes and serve as sub-beams. The space utilization rate and the production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber manufacturing, specifically to a wavelength division multiplexer. Background Technology

[0002] Beam splitters include planar beam splitters and cubic beam splitters. Planar beam splitters are also called filters, and cubic beam splitters are also called cubic beam-splitting prisms. A beam splitter splits incident light into two beams. One portion of the light is reflected at a 90° angle to the side path, while the other portion exits along the incident light path. That is, one beam is perpendicular to the incident light, and the other is collinear or parallel to the incident light. The wavelength and splitting ratio of the two beams are adjusted by the thickness and number of coating layers on the beam body; this is existing technology and will not be elaborated further. Due to the reversible nature of optical paths, beam splitters can also be used to couple light beams.

[0003] Wavelength division multiplexing (WDM), including coarse wavelength division multiplexing (CWDM) and dense wavelength division multiplexing (DWDM), refers to coupling multiple optical signals of different wavelengths onto a single optical fiber for simultaneous transmission. In other words, it couples sub-beams of different wavelengths into a composite beam with multiple wavelengths. It includes a multiplexer and a demultiplexer. The multiplexer (MUX) combines multiple sub-beams of different wavelengths into a composite beam at the transmitting end; the demultiplexer (DEMUX) separates the composite beam with multiple wavelengths transmitted in a single fiber into different fibers at the receiving end, forming sub-beams. The main purpose of WDM is to increase the usable bandwidth of optical fibers, expanding capacity without laying more fiber optic cables, and is therefore widely used by telecommunications companies. As optical paths are reversible, the difference between the multiplexer (MUX) and the demultiplexer (DEMUX) lies in the incident and exit directions of the beams. The sub-beams can be single-wavelength beams or beams with mixed wavelengths, depending on the coating configuration of the beam splitter.

[0004] However, existing wavelength division multiplexers (WDMs) achieve laser splitting and combining through beam splitters, with input and output occurring only within a single plane, resulting in low space utilization. Stacked WDMs require fiber optic connections, leading to reduced connection reliability. Utility Model Content

[0005] The purpose of this invention is to provide a wavelength division multiplexer that can improve testing and packaging efficiency.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows.

[0007] A wavelength division multiplexer includes a housing and a bracket fixed to the housing; the bracket includes a first plate and a second plate; the first plate and the second plate are connected by a connecting post; the housing has a through hole for passing a composite beam and a through hole for passing a sub-beam; the first plate has a first interlayer beam splitter and a first beam splitter array, and the second plate has a second interlayer beam splitter and a second beam splitter array; the first interlayer beam splitter can partially transmit the incident light, which is a composite beam, to the first beam splitter array to form a first outgoing light, and can also partially reflect the incident light to the second interlayer beam splitter to form an interlayer outgoing light; the second interlayer beam splitter can at least partially reflect the interlayer outgoing light to the second beam splitter array to form a second outgoing light; the first beam splitter array can separate the first outgoing light into a first outgoing sub-beam that is directed toward the corresponding through hole; the second beam splitter array can separate the second outgoing light into a second outgoing sub-beam that is directed toward the corresponding through hole.

[0008] Therefore, by using the first and second interlayer beam splitters, the incident light, which is a composite light, can be distributed to the first beam splitter array on the first plate and the second beam splitter array on the second plate. This overcomes the limitation that the incident and outgoing light are transmitted in a single plane, improves space utilization, and eliminates the need for fiber optic bridging between the first and second plates, which helps reduce assembly difficulty and improve production efficiency.

[0009] Furthermore, the first interlayer beam splitter, the first beam splitter array, the second interlayer beam splitter, and the second beam splitter array are cubic beam splitters. This facilitates installation and improves production efficiency.

[0010] Furthermore, the first interlayer beam splitter and the first beam splitter array are located on the side of the first plate closer to the second plate; the second interlayer beam splitter and the second beam splitter array are located on the side of the second plate away from the first plate; the second plate is provided with a through hole for transmitting interlayer emitted light.

[0011] The first and second plates can have the same structure, which simplifies parts and improves production efficiency.

[0012] In other embodiments, the second interlayer beam splitter and the second beam splitter array are located on the side of the second plate closer to the first plate, and neither the first nor the second plate needs to have corresponding through holes for the interlayer emitted light. This can further simplify the manufacturing process of the components.

[0013] Furthermore, reinforcing ribs are provided on both the first and second plates. This helps to improve the overall rigidity of the support, reduce deformation, and improve the precision of light transmission.

[0014] Furthermore, the bracket is secured to the housing using threaded fasteners. The structure is simple, easy to manufacture, and facilitates bracket replacement.

[0015] Furthermore, the housing includes a main shell and a cover, with threaded fasteners securing the first plate to the main shell, improving testing efficiency. The structure is simple, easy to manufacture, and facilitates component replacement.

[0016] Furthermore, the optical fiber used to transmit the composite beam is mounted on the through-hole via a collimator; the optical fiber used to transmit the sub-beam is mounted on the through-hole via a collimator. This facilitates fiber installation and improves fiber positioning efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of the wavelength division multiplexer of this utility model.

[0018] Figure 2 This is a three-dimensional schematic diagram of the wavelength division multiplexer of this utility model, omitting the housing.

[0019] Figure 3 This is a three-dimensional exploded view of the wavelength division multiplexer of this utility model.

[0020] Figure 4 This is a three-dimensional schematic diagram of the first interlayer beam splitter, the second interlayer beam splitter, a portion of the first beam splitter array, and a portion of the second beam splitter array.

[0021] Figure 5 This is a schematic diagram of the optical path of the first interlayer beam splitter and the first beam splitter array.

[0022] Figure 6 This is a schematic diagram of the optical path of the second interlayer beam splitter and the second beam splitter array. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] like Figure 1-6As shown, the wavelength division multiplexer 001 includes a housing 10 and a bracket 20 fixed on the housing 10; the bracket 20 includes a first plate 210 and a second plate 220; the first plate 210 and the second plate 220 are connected by a connecting post 230; the housing 10 is provided with a through hole 101 for passing through the composite beam and a through hole 102 for passing through the sub-beams; the first plate 210 is provided with a first interlayer beam splitter 211 and a first beam splitter array 2110, and the second plate 220 is provided with a second interlayer beam splitter 221 and a second beam splitter array 2210; the first interlayer beam splitter 211 can partially transmit the incident light 01, which is the composite beam, to the first beam splitter array. The first beam splitter array 2110 forms a first outgoing light 21101 and can also partially reflect the incident light 01 to the second interlayer beam splitter 221 to form an interlayer outgoing light 21102; the second interlayer beam splitter 221 can reflect at least partially the interlayer outgoing light 21102 to the second beam splitter array 2210 to form a second outgoing light 22101; the first beam splitter array 2110 can separate the first outgoing light 21101 into a first outgoing sub-beam 211011 that is directed toward the corresponding through-hole 102; the second beam splitter array 2210 can separate the second outgoing light 22101 into a second outgoing sub-beam 221011 that is directed toward the corresponding through-hole 102.

[0025] Preferably, the first interlayer beam splitter 211, the first beam splitter array 2110, the second interlayer beam splitter 221, and the second beam splitter array 2210 are cubic beam splitters. Preferably, the cubic beam splitter is fixed to the positioning groove (223) of the first plate 210 and the second plate 220 by adhesive bonding.

[0026] Preferably, the first interlayer beam splitter 211 and the first beam splitter array 2110 are located on the side of the first plate 210 close to the second plate 220; the second interlayer beam splitter 221 and the second beam splitter array 2210 are located on the side of the second plate 220 away from the first plate 210; the second plate 220 is provided with a through hole 222 for transmitting the interlayer emitted light 21102.

[0027] Preferably, the first plate 210 and the second plate 220 are provided with reinforcing ribs 201.

[0028] Preferably, the bracket 20 is fixed to the housing 10 by threaded fasteners 21.

[0029] Preferably, the housing 10 includes a main housing 11 and a cover 12, and threaded fasteners 21 fix the first plate 210 to the main housing 11.

[0030] Preferably, the optical fiber 010 for transmitting the composite beam is mounted on the through hole 101 via the collimator 011; the optical fiber 020 for transmitting the sub-beam is mounted on the through hole 102 via the collimator 021.

[0031] The reinforcing rib 201 in this application is not essential and can be omitted. The beam splitter in this application is not limited to a cubic beam splitter prism, but can also be a flat beam splitter.

[0032] The above is a detailed description of the present invention in conjunction with specific embodiments, and it should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, any equivalent substitutions or obvious modifications made without departing from the concept of the present invention, and which have the same performance or use, should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. A wavelength division multiplexer (001), characterized in that: Includes a housing (10) and a bracket (20) fixed on the housing (10); The support (20) includes a first plate (210) and a second plate (220); The first plate (210) and the second plate (220) are connected by a connecting post (230); The housing (10) is provided with a through hole (101) for passing through the composite beam and a through hole (102) for passing through the sub-beam. The first plate (210) is provided with a first interlayer beam splitter (211) and a first beam splitter array (2110), and the second plate (220) is provided with a second interlayer beam splitter (221) and a second beam splitter array (2210). The first interlayer beam splitter (211) can partially transmit the incident light (01) as the composite beam to the first beam splitter array (2110) to form the first outgoing light (21101), and can also partially reflect the incident light (01) to the second interlayer beam splitter (221) to form the interlayer outgoing light (21102). The second interlayer beam splitter (221) can reflect at least part of the interlayer outgoing light (21102) to the second beam splitter array (2210) to form a second outgoing light (22101). The first beam splitter array (2110) can separate the first outgoing light (21101) into a first outgoing sub-beam (211011) that is directed toward the corresponding through hole (102) as a sub-beam. The second beam splitter array (2210) can separate the second emitted light (22101) into a second emitted sub-beam (221011) that is directed toward the corresponding through hole (102) as a sub-beam.

2. The wavelength division multiplexer (001) according to claim 1, characterized in that: The first interlayer beam splitter (211), the first beam splitter array (2110), the second interlayer beam splitter (221) and the second beam splitter array (2210) are cubic beam splitters.

3. The wavelength division multiplexer (001) according to claim 2, characterized in that: The first interlayer beam splitter (211) and the first beam splitter array (2110) are located on the side of the first plate (210) closer to the second plate (220); The second interlayer beam splitter (221) and the second beam splitter array (2210) are located on the side of the second plate (220) away from the first plate (210); The second plate (220) is provided with a through hole (222) for transmitting interlayer emitted light (21102).

4. The wavelength division multiplexer (001) according to claim 3, characterized in that: The first plate (210) and the second plate (220) are provided with reinforcing ribs (201).

5. The wavelength division multiplexer (001) according to claim 3, characterized in that: The bracket (20) is fixed to the housing (10) by threaded fasteners (21).

6. The wavelength division multiplexer (001) according to claim 5, characterized in that: The housing (10) includes a main housing (11) and a cover (12), and the threaded fastener (21) secures the first plate (210) to the main housing (11).

7. The wavelength division multiplexer (001) according to any one of claims 1 to 6, characterized in that: The optical fiber (010) for transmitting the composite beam is mounted on the through hole (101) via a collimator (011); The optical fiber (020) for transmitting the sub-beam is mounted on the through-hole (102) via a collimator (021).

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