CN2523123Y - Dense wavelength division multiplexing module - Google Patents

Abstract

A dense wavelength division multiplexing module (DWDM, DenseWavelength Division Multiplexer) includes a base, a plurality of wavelength division multiplexing devices accommodated between the upper cover and the base, device holders, heat shrinkable sleeves and heat shrinkable Casing seat. Wherein the base further includes an annular frame, multiple sets of convex ribs and a stop block, the stop block is parallel to one side of the frame and at a certain distance from the frame, the device seat accommodates the wavelength division multiplexing device, and the heat-shrinkable sleeve seat The protective heat-shrinkable sleeve is received and fixed between the stop block and the frame. The plurality of groups of convex ribs are located in the middle of the base and the adjacent two groups of convex ribs are located in the center of the four-end clamping device holder.

Description

DWDM Module

【Technical field】

The utility model relates to a Dense Wavelength Division Multiplexer (DWDM, Dense Wavelength Division Multiplexer), in particular to a Dense Wavelength Division Multiplexer which can effectively hold internal devices.

【Background technique】

The optical wavelength division multiplexing system is one of the effective schemes to utilize the bandwidth of the optical fiber, which can simultaneously transmit multiple optical signals of different wavelengths in one optical fiber, so as to increase the transmission capacity and reduce the cost of the communication system. The multi-channel optical wavelength division multiplexing device commonly used in the industry is composed of multiple single-channel wavelength division multiplexing units connected in series. The fixing of each single-channel wavelength division multiplexing unit in the device will affect the stability and service life of the entire device.

In the known technology, the wavelength division multiplexing device is usually glued inside the optical module with epoxy resin, and the fixing effect is directly achieved after the glue is cured. However, the curing of epoxy resin needs to go through a baking process, which makes the process of this holding method complicated and the production cycle is long (usually it takes 2 to 3 hours for the epoxy resin to be heated to 110°C for curing), and due to the thermal strain and water absorption of the epoxy resin Sexuality, making the product unstable, when the ambient temperature changes or is heated, the uneven distribution of thermal stress makes the holding weak.

Therefore, it is necessary to provide a dense wavelength division multiplexing module with high environmental stability, simple and fast manufacturing process, and convenient use.

【Content of invention】

The purpose of the utility model is to provide a dense wavelength division multiplexing module with high environmental stability, simple and fast manufacturing process and convenient use.

The purpose of the utility model is achieved by providing a dense wavelength division multiplexing module, which includes a base, a plurality of wavelength division multiplexing devices accommodated between the upper cover and the base, device holders, heat Shrink tubing and heat shrink tubing holders. Wherein the base further includes an annular frame, multiple sets of convex ribs and a stop block, the stop block is parallel to one side of the frame and at a certain distance from the frame, the device seat accommodates the wavelength division multiplexing device, and the heat-shrinkable sleeve seat The protective heat-shrinkable sleeve is received and fixed between the stop block and the frame. The plurality of groups of convex ribs are located in the middle of the base and the adjacent two groups of convex ribs are located in the center of the four-end clamping device holder.

Compared with the existing dense wavelength division multiplexing module, the utility model directly fixes the wavelength division multiplexing device and its output/input optical fiber through multiple sets of convex ribs and at least one stop block. It does not use glue and does not need to be baked. The baking process is simple and fast, with high environmental stability and convenient maintenance and replacement of the wavelength division multiplexing devices inside the dense wavelength division multiplexing module.

【Description of drawings】

Fig. 1 is an exploded perspective view of the dense wavelength division multiplexing module of the present invention.

Fig. 2 is an exploded perspective view of the wavelength division multiplexing device and the device holder of the dense wavelength division multiplexing module of the present invention.

Fig. 3 is a perspective view of the cooperation between the wavelength division multiplexing device and the device holder of the dense wavelength division multiplexing module of the present invention.

Fig. 4 is an exploded perspective view of the heat-shrinkable sleeve and the heat-shrinkable sleeve holder of the DWDM module of the present invention.

Fig. 5 is a three-dimensional view of the cooperation between the heat-shrinkable sleeve and the heat-shrinkable sleeve seat of the dense wavelength division multiplexing module of the present invention.

Fig. 6 is a perspective view of the base of the DWDM module of the present invention.

Fig. 7 is a top view of the dense wavelength division multiplexing module of the present invention with the upper case removed.

【Detailed ways】

Please refer to Fig. 1, the dense wavelength division multiplexing module 1000 of the present invention includes a top cover 1, a base 2, a plurality of wavelength division multiplexing devices 3 accommodated between the top cover 1 and the base 2, device bearings Seat 4, heat-shrinkable sleeve 5 and heat-shrinkable sleeve holder 6 (only one of them is shown in the figure). The dense wavelength division multiplexing module 1000 further includes a rubber ring 7 that acts together as a seal, an optical fiber protection device 8 that includes a plurality of stress buffer sleeves 82 and a sleeve holder 81, and the sleeve holder 81 has a plurality of through hole.

Please refer to FIG. 2 and FIG. 3 together. The wavelength division multiplexing device 3 is a commonly used wavelength division multiplexing device in the industry, which includes a sleeve 32 with a groove 31 in the middle and a plurality of optical fibers 33 . The device holder 4 is made of elastic rubber or plastic material, and its shape is roughly a cuboid. Its end face 40 is provided with a through hole 43 that runs through the inside. 32 equal diameters, the middle has an annular stopper 45, the width of the stopper 45 is equal to the width of the groove 31 of the sleeve 32, and the thickness is slightly smaller than the depth of the groove 31 to match the groove 31 of the sleeve 32 Cooperate. Two ends of one set of side surfaces 41 of the device holder 4 are respectively provided with a step 46 , and one of the other set of side surfaces 42 is provided with an opening 44 communicating with the through hole 43 . The wavelength division multiplexing device 3 is pressed into the device holder 4 through the opening 44, and the wavelength division multiplexing device 3 is accommodated in it through the elasticity of the device holder 4 itself and passes through the ring stopper of the device holder 4. 45 cooperates with the groove 31 of the sleeve 32 of the wavelength division multiplexing device 3 to limit the axial freedom of the wavelength division multiplexing device 3 .

Please refer to Fig. 4 and Fig. 5, the heat-shrinkable sleeve 5 covers the fused optical fiber 33 to accommodate and protect the optical fiber, and the heat-shrinkable sleeve seat 6 is made of elastic rubber or plastic material, and its shape is a cuboid. Its end face 60 is provided with a plurality of through-holes 61 penetrating through its interior. These through-holes 61 have the same diameter as the heat-shrinkable sleeve 5 . 63 communicates with the opening 62 . The heat-shrinkable sleeve 5 is pressed into the through hole 61 of the heat-shrinkable sleeve holder 6 through the opening 62 , and then is fixed on the heat-shrinkable sleeve holder 6 .

Please refer to FIG. 1 and FIG. 6 , the base 2 of the dense wavelength division multiplexing module 1000 of the present invention includes a rectangular bottom plate 26 , an annular frame 21 located on the bottom plate 26 , multiple stop blocks 22 and multiple sets of convex ribs 23 .

The upper surface of the annular frame 21 is provided with an annular groove 211 for accommodating the rubber ring 7 and a plurality of screw holes 213 for locking the upper cover 1, and a long strip opening 212 is provided on its side, and the optical fiber protection device 8 is fixed on the The elongated opening 212 protects the input/output optical fiber 33 of the DWDM module 1000 .

The plurality of stoppers 22 are located in the ring frame 21 adjacent to and parallel to the side of the ring frame 21 without the elongated opening 212, and the distance from the side is equal to the width of a group of sides of the heat shrinkable sleeve seat 6, Two ends of the stop block 22 respectively have a bent portion 221 , and the distance between the two bent portions 221 is equal to the length of the heat shrinkable sleeve seat 6 . The horizontal degree of freedom of the heat shrinkable sleeve 6 can be limited by the stop block 22 and the ring frame 21 .

The multiple sets of ribs 23 are located at the center of the bottom plate 26, and each set of stop blocks is symmetrical about the center line, which includes an end 231 adjacent to the center line and a curved portion 232, and the ends 231 of each set of ribs 23 are vertical on the center line, and the spacing is equal to the spacing of the two steps 46 on the same side of the device holder 4, the curved parts 232 are all curved inwardly, and the convex ribs on the outside are slightly longer than the convex ribs on the inside, and two adjacent groups of convex ribs 23 A curved accommodating groove 24 is formed, and the distance between the ends 231 thereof is equal to the distance between the steps 46 on two opposite sides of the device holder 4 .

Please refer to FIG. 7 , the wavelength division multiplexing device 3 is held by the device holder 4 and then clamped between two adjacent groups of convex ribs 23, and the device holder 4 and the The wavelength division multiplexing device 3 held by it. The output and input optical fibers 33 of the wavelength division multiplexing device 3 are placed in the curved accommodation groove 24 formed by the adjacent convex rib 23, wherein the optical fiber 33 that transmits optical signals with the outside of the module passes through the stress buffer sleeve 82 and the external optical fiber or optical devices (not shown), and the optical fiber 33 connected to other wavelength division multiplexing devices 3 in the module is fused and placed in the heat shrinkable sleeve 5, and the fused optical fiber is protected by the heat shrinkable sleeve 5 33. The heat-shrinkable sleeve 5 is accommodated in the sleeve holder 6 , and the sleeve holder 6 is then fixed in the receiving space formed by the stop block 22 and the frame 21 .

Please refer to Fig. 1 again, the upper cover 1 of the dense wavelength division multiplexing module 1000 of the present utility model is locked on the base 2 by screws (not shown) or other holding components, which presses the device holder 4 and the heat shrinkable sleeve holder Seat 6 restricts its vertical degree of freedom, and further restricts the degree of freedom of device holder 4 and heat-shrinkable sleeve holder 6. The upper cover 1 simultaneously presses the rubber ring 7 with a sealing effect to prevent external water vapor from entering the dense wave. Demultiplexing module 1000. The bottom plate 26 of the base 2 further defines a plurality of through holes 261 for locking the DWDM module 1000 in the communication device.

Claims (11)

1. A dense wavelength division multiplexing module, which includes a base and a plurality of wavelength division multiplexing devices, each wavelength division multiplexing device includes a sleeve and a plurality of optical fibers, characterized in that the dense wavelength division multiplexing module The set also includes a plurality of device holders for accommodating and holding the plurality of wavelength division multiplexing devices. The base includes a bottom plate and a plurality of sets of ribs are arranged in the middle thereof, and the plurality of device holders are fixed on the plurality of sets of ribs. between. 2. The dense wavelength division multiplexing module as claimed in claim 1, wherein the device seat is made of elastic rubber or plastic material and is roughly a rectangular parallelepiped. 3. The dense wavelength division multiplexing module as claimed in claim 2, characterized in that two ends of a set of side surfaces of the device holder are respectively provided with a step. 4. The dense wavelength division multiplexing module as claimed in claim 1, characterized in that the dense wavelength division multiplexing module further comprises a frame, and an annular groove is opened on its upper surface to accommodate an annular rubber ring so that the The modules are hermetically sealed. 5. The dense wavelength division multiplexing module as claimed in claim 4, wherein an opening is opened on one side of the frame, and the output and input optical fibers of the dense wavelength division multiplexing module are inserted through the long opening. 6. The dense wavelength division multiplexing module as claimed in claim 4, characterized in that the dense wavelength division multiplexing module further comprises a plurality of heat-shrinkable sleeves and a heat-shrinkable sleeve for accommodating the plurality of heat-shrinkable sleeves The seat, the seat of the heat-shrinkable sleeve is made of elastic rubber or plastic material, and is roughly a cuboid. 7. The dense wavelength division multiplexing module as claimed in claim 6, characterized in that the base plate of the dense wavelength division multiplexing module is provided with at least one stop block, and the heat shrinkable sleeve seat is accommodated and held on the at least one stopper. between the stop block and the frame. 8. The dense wavelength division multiplexing module as claimed in claim 7, characterized in that the at least one stop block is parallel to and adjacent to the side of the frame and its distance from the ring frame is the same as that of a set of side faces of the heat shrinkable sleeve seat are equal in width. 9 . The dense wavelength division multiplexing module as claimed in claim 7 , wherein the at least one stop block has two bent portions, and the distance between the two bent portions is equal to the length of the heat-shrinkable tube seat. 10. The dense wavelength division multiplexing module according to claim 1, wherein the multiple sets of ribs are located in the middle of the bottom plate, and the device holder is fastened by the four ends of the adjacent two sets of ribs located in the center. 11. The dense wavelength division multiplexing module as claimed in claim 1, wherein the plurality of optical fibers are arranged in bending accommodation grooves formed by adjacent ribs.

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