阅读说明：本技术 波分复用器 (Wavelength division multiplexer ) 是由 缪鹏 张伟 姚秋飞 缪冬青 于 2020-04-21 设计创作，主要内容包括：本发明提供的一种波分复用器,包括分体式盒体和封装于所述分体式盒体内的传输芯片及配套所述传输芯片的热补偿模块,所述传输芯片的输入波导和输出波导分别与单模光纤和多模光纤相连,且所述单模光纤的另一端与单模光纤接头组件相连,所述多模光纤的另一端与MPO组件相连,用以分别连接终端设备输出端和传输设备输入端来构成整体的传输链路。本发明提供的波分复用器,与基于LC连接器无热AWG波分复用器相比,利用MPO连接器做传输连接,实现高集成、大容量传输,且传输损耗低；将MPO连接器固定在封装盒内部,从源头解决布线问题；整合封装盒内部空间,促进产品降本。(The invention provides a wavelength division multiplexer, which comprises a split box body, a transmission chip packaged in the split box body and a thermal compensation module matched with the transmission chip, wherein an input waveguide and an output waveguide of the transmission chip are respectively connected with a single mode fiber and a multimode fiber, the other end of the single mode fiber is connected with a single mode fiber joint component, and the other end of the multimode fiber is connected with an MPO component and is used for respectively connecting an output end of a terminal device and an input end of a transmission device to form an integral transmission link.)

1. A wavelength division multiplexer, characterized by: including split type box body and encapsulation in transmission chip (7) in the split type box body and supporting the thermal compensation module of transmission chip (7), the input waveguide and the output waveguide of transmission chip (7) link to each other with single mode fiber (8) and multimode fiber (9) respectively, just the other end and the single mode fiber splice subassembly of single mode fiber (8) link to each other, the other end and the MPO subassembly of multimode fiber (9) link to each other, single mode fiber splice subassembly with the MPO subassembly encapsulate in just connect terminal equipment output and transmission equipment input respectively in the split type box body and constitute holistic transmission link.

2. A wavelength division multiplexer according to claim 1, wherein: the MPO assembly comprises an MPO connector (3) and an MPO adapter (5) which are connected, wherein the MPO connector (3) is connected with the multimode fibers (9) and is arranged in the split type box body, a main body of the MPO adapter (5) is arranged in the split type box body, and an external port of the MPO adapter (5) is exposed at a first opening (51) of the side wall of the split type box body and is used for being connected with the input end of the transmission equipment.

3. A wavelength division multiplexer according to claim 2, wherein: the lateral wall of split type box body is equipped with second opening (41), soft protective sheath (4) have been inlayed in second opening (41) for protect single mode fiber (8).

4. A wavelength division multiplexer according to claim 3, wherein: the soft protective sleeve (4) is hollow or spliced, and the single-mode optical fiber (8) is installed inside the soft protective sleeve (4).

5. A wavelength division multiplexer according to claim 3, wherein: the first opening (51) and the second opening (41) are arranged on two opposite side walls of the split box body.

6. A wavelength division multiplexer according to claim 3, wherein: the split type box body comprises a cover plate (1) and a bottom box (2), and the cover plate and the bottom box are fixed through screws.

7. A wavelength division multiplexer according to claim 6, wherein: the bottom box (2) comprises a rectangular bottom plate, the rectangular bottom plate extends out in the normal direction of the side wall to form a convex groove, the outer surface of the side wall is located on the same plane with the edge of the rectangular bottom plate, four corners of the rectangular bottom plate are inwards sunken to form mounting holes, the wavelength division multiplexer is mounted on a matched device, and the cover plate (1) is matched with the convex shape of the side wall and fixed through screws.

8. A wavelength division multiplexer according to claim 7, wherein: soft protective sheath (4) with MPO adapter (5) all are equipped with spacing portion (411,511), the lateral wall be equipped with spacing portion (411,511) assorted recess is so that the location installation.

9. A wavelength division multiplexer according to claim 2, wherein: the MPO assembly comprises a plurality of groups of multi-core MPO connectors (3) and MPO duplex adapters, and is used for connecting at least 6-core optical fibers.

10. A wavelength division multiplexer according to claim 2, wherein: the thermal compensation assembly comprises a substrate (6), a thermal expansion screw rod (10) and a thermal expansion screw (11), wherein the transmission chip (7) is installed on the substrate (10), the substrate (10) and the transmission chip (7) are respectively provided with a plurality of cutting grooves (12) and a plurality of cutting seams, the cutting seams correspond to the cutting grooves (12), and the thermal expansion screw rod (10) is arranged on one side of the substrate (6) and is matched and screwed with the thermal expansion screw (11) to fix the cutting grooves (12); based on the change of the environmental temperature, the input waveguide or the output waveguide generates drift, and the thermal expansion screw (11) is matched with the thermal expansion screw (10) to cause the cutting slot (12) to drive the cutting seam to displace, so that the input waveguide or the output waveguide returns to a set position.

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a wavelength division multiplexer.

Background

At present, a color light module has been widely applied to a DWDM (Dense Wavelength Division Multiplexing) system, especially to an athermal Arrayed Waveguide Grating (AWG) Wavelength Division multiplexer, and because the Wavelength Division multiplexer has a Wavelength thermal compensation device and the operating Wavelength is not affected by temperature, the color light module has been widely applied to an optical network capacity expansion system.

The conventional AWG type wavelength division multiplexer adopts L C connectors as connection and transmission functions, but the transmission performance of the L C connector is limited due to the fact that the transmission capacity of the connector is too small, the traditional product is packaged through long-distance optical fiber ribbons, the optical fiber ribbons are wound in an external connector, number tubes penetrate through the optical fiber ribbons to correspond to product waveguide channels, the whole wiring is long and messy, the waveguide channels are easily confused, transmission links are confused, and the internal packaging of the product is simple and is not utilized sufficiently.

Disclosure of Invention

In view of the above, there is a need to provide an improved wavelength division multiplexer.

The technical scheme provided by the invention is as follows: the utility model provides a wavelength division multiplexer, include split type box body and encapsulate in transmission chip in the split type box body and supporting transmission chip's thermal compensation module, transmission chip's input waveguide and output waveguide link to each other with single mode fiber and multimode fiber respectively, just single mode fiber's the other end links to each other with single mode fiber connector subassembly, multimode fiber's the other end links to each other with the MPO subassembly, single mode fiber connector subassembly with the MPO subassembly encapsulate in the split type box body and connect terminal equipment output and transmission equipment input respectively and constitute holistic transmission link.

Furthermore, the MPO assembly comprises an MPO connector and an MPO adapter which are connected, wherein the MPO connector is connected with the multimode optical fiber and is arranged in the split type box body, a main body of the MPO adapter is arranged in the split type box body, and an external interface of the MPO adapter is exposed at a first opening of the side wall of the split type box body and is used for being connected with the input end of the transmission equipment.

Further, the lateral wall of split type box body is equipped with the second opening, soft protective sheath has been inlayed to the second opening for protect single mode fiber.

Further, the soft protective sleeve is hollow or spliced, and the single-mode optical fiber is installed inside the soft protective sleeve.

Furthermore, the first opening and the second opening are arranged on two opposite side walls of the split type box body.

Furthermore, the split type box body comprises a cover plate and a bottom box which are fixed through screws.

Further, the end box includes the rectangle bottom plate normal direction is extended the lateral wall is in order to form the type of calligraphy recess of protruding, wherein the lateral wall surface with the edge of rectangle bottom plate is in the coplanar, and four angles departments of rectangle bottom plate are inwards sunken to set up the mounting hole and make wavelength division multiplexer installs on supporting device, the apron with the type of calligraphy appearance phase-match of lateral wall just passes through the fix with screw.

Further, soft protective sheath with the MPO adapter all is equipped with spacing portion, the lateral wall be equipped with spacing portion assorted recess is so that the location installation.

Further, the MPO assembly comprises a plurality of multi-core MPO connectors and MPO duplex adapters, and is used for connecting at least 6-core optical fibers.

Further, the thermal compensation assembly comprises a substrate, a thermal expansion screw and a thermal expansion screw, wherein the transmission chip is mounted on the substrate, the substrate and the transmission chip are respectively provided with a plurality of cutting grooves and a plurality of cutting seams, the cutting seams correspond to the cutting grooves, and the thermal expansion screw is arranged on one side of the substrate and is matched and screwed with the thermal expansion screw to fix the cutting grooves; based on the change of the environmental temperature, the input waveguide or the output waveguide generates drift, and the thermal expansion screw is matched with the thermal expansion screw to cause the cutting groove to drive the cutting seam to displace, so that the input waveguide or the output waveguide returns to a set position.

Compared with an L C connector-based athermal AWG (arrayed waveguide grating) wavelength division multiplexer, the wavelength division multiplexer provided by the invention has the advantages that the MPO connector is used for transmission connection, high integration and large-capacity transmission are realized, the transmission loss is low, the MPO connector is fixed inside the packaging box, the wiring problem is solved from the source, the internal space of the packaging box is integrated, and the cost of products is reduced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a wavelength division multiplexer according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a partial structure of the wavelength division multiplexer shown in fig. 1.

Fig. 3 is a schematic diagram of an internal structure of the wavelength division multiplexer shown in fig. 1.

Fig. 4 is a graph showing the loss of the wavelength division multiplexer according to the embodiment of the present invention as a function of wavelength.

Description of the main element symbols:

cover plate 1

Bottom case 2

MPO connector 3

Soft protective cover 4

MPO adapter 5

Substrate 6

Transmission chip 7

Single mode optical fibre 8

Multimode optical fiber 9

Thermal expansion screw 10

Thermal expansion screw 11

Cutting groove 12

First opening 51

Second opening 41

Stopper 511

Limiting part 411

The following detailed description further illustrates embodiments of the invention in conjunction with the above-described figures.

Detailed Description

So that the manner in which the above recited objects, features and advantages of embodiments of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the invention, and the described embodiments are merely a subset of embodiments of the invention, rather than a complete embodiment. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention belong. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention.

The wavelength division multiplexer comprises a split box body, a transmission chip packaged in the split box body and a thermal compensation module matched with the transmission chip, wherein an input waveguide and an output waveguide of the transmission chip are respectively connected with a single mode fiber and a multimode fiber, the other end of the single mode fiber is connected with a single mode fiber connector assembly, the other end of the multimode fiber is connected with an MPO assembly, the single mode fiber connector assembly and the MPO assembly are packaged in the split box body and are respectively connected with an output end of a terminal device and an input end of a transmission device to form an integral transmission link, compared with a L C-based connector athermal AWG wavelength division multiplexer, the wavelength division multiplexer realizes high integration and large-capacity transmission by using the MPO connector for transmission connection, has low transmission loss, fixes the MPO connector in the packaging box, solves the wiring problem from the source, integrates the internal space of the packaging box, and promotes cost reduction of products.

In a specific embodiment, the MPO assembly includes an MPO connector and an MPO adapter connected to each other, where the MPO connector is connected to the multimode fibers and disposed inside the split-type box, a main body of the MPO adapter is installed inside the split-type box, and an external interface of the MPO adapter is exposed at a first opening of a side wall of the split-type box, so as to be connected to the input end of the transmission device.

In specific implementation, the lateral wall of split type box body is equipped with the second opening, soft protective sheath has been inlayed to the second opening for protect single mode fiber. For example, the soft protective sheath is hollow, and the single-mode optical fiber is installed inside the soft protective sheath, i.e. inserted out; for another example, the soft protection sleeve is a splicing type, and the single-mode optical fiber is installed inside the soft protection sleeve, that is, the single-mode optical fiber is clamped in the plurality of soft protection sleeves to avoid friction with the side wall.

In a specific embodiment, the first opening and the second opening are disposed on two opposite side walls of the split-type box body. As shown in fig. 2, the case has a substantially rectangular shape, and the first opening and the second opening are provided on the side walls of the short sides, respectively. In other embodiments, the outer shape of the case is not limited to a rectangle.

In a specific embodiment, the split box body comprises a cover plate and a bottom box which are fixed through screws. As shown in fig. 2, the bottom case includes a rectangular bottom plate, the side wall extends upwards from the rectangular bottom plate in the normal direction to form a concave groove in a shape of a Chinese character 'tu', wherein the outer surface of the side wall and the edge of the rectangular bottom plate are located on the same plane, four corners of the rectangular bottom plate are inwards recessed to form mounting holes, so that the wavelength division multiplexer is mounted on a matching device, and the cover plate is matched with the shape of the Chinese character 'tu' of the side wall and is fixed by screws. The side walls may also be provided with mounting holes (in the middle of one side wall as shown in fig. 2) to also play a role in fixing, and mainly prevent the shell from deforming due to thermal expansion and contraction of the central portion.

In some embodiments, as shown in fig. 2, the soft protective casing and the MPO adapter are each provided with a limiting portion, and the side wall is provided with a groove matched with the limiting portion for positioning and installation, in some embodiments, the MPO assembly comprises a plurality of groups of multi-core MPO connectors and MPO duplex adapters for connection of at least 6-core optical fibers, the wavelength division multiplexer of the present invention can provide a 6-core-96-core product solution, wherein 96 cores are the maximum number of cores required in the industry at present, the present invention has the most advantage of high-density connection by using MPO connectors, if the actual number of cores is less than 6 cores, the necessity of using MPO connectors is not needed, if the actual number of cores is between 6 cores and 12 cores, 1 group of MPO connectors can be used, if the actual number of cores is between 12 cores and 24 cores, 2 groups of 12-core connectors can be used, if the actual number of cores is between 24 cores and 48 cores, 2 groups of 24-core connectors can be used, if the actual number of cores is between 24 cores and 48 cores, the MPO connectors can be used, if the actual number of cores is between 48-core connectors is between 24 cores, the high-core connectors can be used, the future, the high-density connection speed multiplexer is more suitable for high-speed transmission, and the high-speed transmission is more suitable for the high-speed transmission of the future, and the like.

In a specific embodiment, as shown in fig. 3, the thermal compensation component includes a substrate, a thermal expansion screw, and a thermal expansion screw, wherein the transmission chip is mounted on the substrate, the substrate and the transmission chip are respectively provided with a plurality of cutting grooves and a plurality of cutting seams, the cutting seams correspond to the cutting grooves (the cutting seams are formed by cutting the transmission chip according to the cutting grooves, and the width of the cutting seams is generally 0.03mm to 0.035mm), the thermal expansion screw is disposed on one side of the substrate, and is screwed together with the thermal expansion screw to fix the cutting grooves; based on the change of the environmental temperature, the input waveguide or the output waveguide generates drift, and the thermal expansion screw is matched with the thermal expansion screw to cause the cutting groove to drive the cutting seam to displace, so that the input waveguide or the output waveguide returns to a set position.

The principle of thermal compensation: when the environmental temperature changes, the input waveguide or the output waveguide will drift to several adjacent channels with the temperature change due to the temperature drift characteristic of the transmission chip, and distortion is caused. The thermal compensation module has a thermal expansion coefficient opposite to that of the waveguide of the transmission chip under the temperature change, when the ambient temperature rises, the waveguide of the transmission chip deflects towards the upper channel, the thermal expansion screw in the thermal compensation module is heated and screwed, the cutting groove drives the cutting seam of the transmission chip to shrink, and the waveguide of the transmission chip deflects towards the lower channel, so that the transmission chip returns to a normal channel. And vice versa.

As shown in fig. 3, the internal integral link is carried on a substrate, an input waveguide and an output waveguide of the transmission chip are respectively connected with a single-mode fiber and a multimode fiber, the single-mode fiber is protected by a rubber cap, and a connector component is additionally arranged to be connected with an output end of the terminal equipment; in this embodiment, the multimode fiber optic ribbon has a total of 48 core fibers, and is divided into two groups of 24-core added MPO connectors connected to the MPO duplex adapter, and connected to the input end of the transmission device, so as to form an integral transmission link.

The packaging process of the whole athermal AWG type wavelength division multiplexer comprises the following steps:

(1) adhering silica gel at three points on the back of the substrate, adhering the thermal compensation module which is coupled and debugged into a packaging box, and standing for 5min to completely cure the thermal compensation module;

(2) after the thermal compensation module is pasted, the single-mode optical fiber at the input end of the transmission chip is penetrated into the loose tube, and the multi-mode optical fiber ribbon at the output end of the transmission chip is also penetrated into the prepared loose tube, and then an MPO connector and the like are added according to the requirement;

(3) the rubber cap is clamped in the rubber cap hole and is fixed by silica gel;

(4) and screwing down the packaging screw to seal the product.

The invention takes two groups of 24-core MPO connectors to connect 48-core optical fibers as an example, and the performance of the invention is compared with that of the existing wavelength division multiplexer in the industry, as shown in FIG. 4 and the following table.

As can be seen from fig. 4 and the above table, the wavelength division multiplexer of the present invention has various indexes meeting the industrial standard, is superior to similar products, and especially has small loss, and in addition, compared with the traditional L C connector, the space utilization rate is improved, the complexity of wiring is avoided, and the cost is reduced.

Although the embodiments of the present invention have been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the embodiments of the present invention.