CWDM optical packaging module

Abstract

The utility model provides a CWDM optical packaging module, comprising a housing, the housing comprises an upper housing and a lower housing, a PCB assembly and an optical transmit-receive assembly are arranged in a cavity between the upper housing and the lower housing, and protection units are respectively arranged in cooperation with the PCB assembly and the optical transmit-receive assembly. According to the utility model, dustproof measures are strictly executed; the devices in the shell are strictly positioned, so that mutual influence among the chips or the components is avoided, and the chips are prevented from being scratched; the optical transceiver assembly is fastened, so that the performance of the PCB assembly and the optical transceiver assembly is prevented from being affected by vibration in use, and the anti-vibration performance is improved; electrostatic discharge damage is effectively prevented, and electric devices are isolated; heat production sites of the optical packaging module are analyzed, and efficient heat dissipation is realized by matching with various heat dissipation structures, so that the optical packaging module is also excellent in performance in a high-temperature and high-humidity environment; the optical module is simple in structure, high in product reliability, convenient to realize small-batch production, and capable of being applied to the field of miniaturized optical modules in the market, and realizes the development of the optical module towards miniaturization and high integration.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of optical element, system or instrument, in particular to a CWDM optical packaging module. BACKGROUND

[0002] With the continuous development of optical communication technology, the integration degree of optical switch is higher and higher, and the number of optical modules used by a single switch also increases significantly, optical module is composed of optoelectronic devices, functional circuits and optical interfaces, which converts electrical signals into optical signals through the sending end, and converts optical signals into electrical signals through the receiving end after transmission through optical fiber, thereby completing information transmission. In the optical module, the optoelectronic devices and functional circuits are collectively referred to as optical transmission module.

[0003] CWDM optical module is a kind of optical module using CWDM technology, used to realize the connection between existing network equipment and CWDM multiplexer / demultiplexer, which can increase network capacity by transmitting multiple data channels with individual optical wavelengths (1270nm to 1610nm) on the same single optical fiber. CWDM optical module generally has the advantages of low cost, small size and low power consumption.

[0004] However, in the prior art, the failure rate of CWDM optical packaging module is not low, and the main reason is still due to frequent plugging, improper application, including exposing the optical module to improper environment, improper use of optical joint end face at the tail fiber, scratches, electrostatic discharge damage, chip damage, etc. Due to the high precision of CWDM optical packaging module, these damages will bring great difficulty to subsequent maintenance, in addition to the difficulty of disassembly and replacement, retesting is also needed, and the maintenance cost is large. UTILITY MODEL CONTENTS

[0005] The utility model solves the problems in the prior art and provides a CWDM optical packaging module.

[0006] The utility model adopts the technical scheme that a CWDM optical packaging module comprises a shell, the shell comprises an upper shell body and a lower shell body, a PCB assembly and an optical transceiver assembly are arranged in the cavity between the upper shell body and the lower shell body, and a protection unit is arranged in cooperation with the PCB assembly and the optical transceiver assembly.

[0007] Preferably, the optical transceiver assembly comprises an optical generator and an optical receiver, a corresponding tail fiber is arranged at the output end of the optical generator and the receiving end of the optical receiver through an isolation sleeve, and a container groove is arranged on the front part of the inner side of the shell in cooperation with the two isolation sleeves; the optical generator and the optical receiver are independent packaging structures.

[0008] Preferably, the protection unit comprises an electrostatic isolation groove behind any of the containing grooves; and a mounting position is arranged between the two electrostatic isolation grooves.

[0009] Preferably, the front end of the isolation sleeve is arranged outside the front of the shell.

[0010] Preferably, the protection unit further comprises a limiting piece arranged between the output end of the light generator and the receiving end of the light receiver and the corresponding isolation sleeve, and the two limiting pieces are respectively provided with corresponding clamping grooves.

[0011] Preferably, the PCB assembly comprises a first PCB plate arranged on the light receiver and a second PCB plate arranged behind the light generator and the light receiver, and the light generator, the light receiver and the first PCB plate are respectively connected to the second PCB plate through a flexible PCB; the rear side of the second PCB plate is connected to a pin header, and the end of the pin header is arranged on the rear side of the shell.

[0012] Preferably, the protection unit further comprises a heat-conducting block arranged on the top of the light generator, and a heat dissipation groove is arranged on the top inner side of the upper shell body corresponding to the heat-conducting block.

[0013] Preferably, the protection unit further comprises a heat dissipation gasket arranged on the bottom of the light generator.

[0014] Preferably, the protection unit further comprises one or more heat dissipation blocks arranged between the second PCB plate and the shell.

[0015] Preferably, the protection unit further comprises a one-way heat dissipation hole arranged below the rear part of the shell.

[0016] The utility model provides a CWDM optical packaging module, including shell, the shell includes upper shell body and lower shell body, and the cavity between upper shell body and lower shell body is equipped with PCB assembly and light transceiver assembly, and the protection unit is arranged corresponding to the PCB assembly and light transceiver assembly.

[0017] The utility model has the advantages of:

[0018] (1) Strictly implement dustproof measures, and core components are not exposed to dust;

[0019] (2) Strictly position the devices in the shell, avoid the mutual influence between chips or components, prevent the scratch of the chip, fasten the light transceiver assembly, avoid the vibration influence on the performance of the PCB assembly and light transceiver assembly in use, and improve the anti-vibration performance;

[0020] (3) Effectively prevent electrostatic discharge damage, and isolate electrical devices;

[0021] (4) Analyze the heat generation site of the optical packaging module, cooperate with multiple heat dissipation structures to realize high-efficiency heat dissipation, and make it perform excellently in high-temperature and high-humidity environment;

[0022] (5) The product has high reliability, is convenient for realizing small-batch production, can be applied to the field of market miniaturized optical modules, and realizes the development of optical modules in the direction of miniaturization and high integration. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a perspective view structural schematic diagram of the utility model;

[0024] Figure 2 It is a perspective view structural schematic diagram of the utility model without the upper shell;

[0025] Figure 3 It is a sectional view structural schematic diagram of the utility model corresponding to the light generator;

[0026] Figure 4 It is a sectional view structural schematic diagram of the utility model corresponding to the light receiver. DETAILED DESCRIPTION

[0027] The utility model will be further described in detail in combination with examples, but the protection scope of the utility model is not limited to this.

[0028] The utility model relates to a CWDM optical packaging module, including shell, the shell includes upper shell 1 and lower shell 2, the cavity between upper shell 1 and lower shell 2 is equipped with PCB assembly and light transceiver assembly, and the protection unit is equipped with respectively with the cooperation of PCB assembly and light transceiver assembly.

[0029] It is agreed that for the optical packaging module, the operating end (the end where the tail fiber 6 is located) is "front".

[0030] As the optical packaging module, the basic structure of the utility model is consistent, and the actual difference from the prior art is the protection unit, and the following is specifically explained.

[0031] The light transceiver assembly includes light generator 3 and light receiver 4, and the output end of the light generator 3 and the receiving end of the light receiver 4 are provided with corresponding tail fibers 6 through the isolation sleeve 5; the inner side of the shell in front of the two isolation sleeves 5 is respectively provided with a containing groove 7.

[0032] The front end of the isolation sleeve 5 is arranged on the front outer side of the shell.

[0033] In the utility model, the output end of the light generator 3 and the receiving end of the light receiver 4 are provided with corresponding tail fibers 6 through the isolation sleeve 5, in the implementation process, the isolation sleeve 5 is fastened in the containing groove 7 on the front inner side of the shell, the containing groove 7 is a cylindrical through groove, which is convenient for the adhesion and adaptation of the isolation sleeve 5, and the waterproof and dustproof performance is improved;

[0034] Further, the front end of the isolating sleeve 5 is arranged at the front outer side of the shell, further protecting the pigtail 6 and realizing the flexible connection between the pigtail 6 and the outer side of the shell, avoiding the cracking of the insulating skin outside the pigtail 6 in use.

[0035] The protection unit comprises an electrostatic isolation groove 8 behind any of the containing grooves 7; and a mounting position 9 is arranged between the two electrostatic isolation grooves 8.

[0036] In the utility model, the signal is connected at the containing groove 7, so the electrostatic isolation groove 8 is arranged behind the containing groove 7, specifically, the electrostatic isolation groove 8 is arranged at the inner bottom of the lower shell 2, realizing the electrostatic isolation; in the specific implementation, the electrostatic isolation net can also be arranged at the position, such as being arranged into the copper net, realizing the electrostatic shielding.

[0037] The mounting position 9 is used for mounting the CWDM optical packaging module as a whole, as shown in the figure, the mounting position 9 is arranged at the lower shell 2. Figure 3 As shown in the figure, the mounting position 9 is provided with a fastener 21 for mounting.

[0038] The protection unit further comprises a limiting piece 10 arranged between the output end of the light generator 3 and the receiving end of the light receiver 4 and the corresponding isolating sleeve 5, and the two limiting pieces 10 are respectively provided with corresponding clamping grooves 11.

[0039] In the utility model, in order to better realize the position fixation of the light generator 3 and the light receiver 4, prevent the abnormal output caused by shaking and the like, the limiting piece 10 is configured, the limiting piece 10 is actually three independent or associated vertical pieces, and the three limiting pieces 10 are all provided with the vertical clamping grooves 11 matched with the corresponding light generator 3 and light receiver 4; the light generator 3 and the light receiver 4 are installed or dismounted through the clamping grooves 11, and the clamping grooves 11 play a certain positioning role.

[0040] The above structure ensures that the CWDM optical packaging module of the utility model is complete and stable in structure, strictly positions the devices in the shell, avoids the mutual influence between chips or components, prevents the chips from being damaged, fastens the light transceiver assembly, avoids the vibration influence on the performance of the PCB assembly and the light transceiver assembly in use, and improves the anti-vibration performance.

[0041] Another important problem of the CWDM optical packaging module of the utility model is how to perform excellently in various environments, including high temperature and high humidity, and the following protection unit mainly functions to perform reliable thermal management.

[0042] The PCB assembly comprises a first PCB plate 12 arranged on the light receiver 4 and a second PCB plate 13 arranged behind the light generator 3 and the light receiver 4, and the light generator 3, the light receiver 4 and the first PCB plate 12 are connected with the second PCB plate 13 through a flexible PCB 14; the rear side of the second PCB plate 13 is connected to a pin header 15, and the tail end of the pin header 15 is arranged at the rear side of the shell.

[0043] The protection unit further comprises a heat-conducting block 16 arranged on the top of the light generator 3, and a heat dissipation groove 17 is arranged on the inner top of the upper shell 1 in cooperation with the heat-conducting block 16.

[0044] The protection unit further comprises a heat dissipation gasket 18 arranged on the bottom of the light generator 3.

[0045] The protection unit further comprises one or more heat dissipation blocks 19 arranged between the second PCB board 13 and the shell.

[0046] The protection unit further comprises a one-way heat dissipation hole 20 arranged below the rear part of the shell.

[0047] In the utility model, the second PCB board 13 collects the light and electrical signals at the light receiver 4 and the first PCB board through the flexible PCB 14, outputs to the light generator 3 through the flexible PCB 14, and is surface soldered with the user circuit board (not shown in the figure) through the pin header 15, greatly improves the 10Gbps high-speed signal quality on the user circuit board; the CWDM light packaging module is connected with the user circuit board through the mounting through hole 22 in installation.

[0048] On this basis, considering that the light transceiver assembly generates heat in work and the heat generation of the light generator 3 is higher than that of the light receiver 4, more strict heat management is performed on the light generator 3, specifically:

[0049] The heat-conducting block 16 is arranged on the top of the light generator 3, and the heat dissipation groove 17 is arranged on the inner top of the upper shell 1 in cooperation, which can protect the light generator 3 to a certain extent during assembly, and can quickly dissipate the heat generated by the light generator 3 from the upper shell 1 through the cooperation of the heat-conducting block 16 and the heat dissipation groove 17, and as shown, the bottom of the heat dissipation groove 17 and the top of the heat-conducting block 16 are also provided with a cavity, which can effectively buffer heat and prevent heat runaway;

[0050] Further, the heat dissipation gasket 18 is arranged on the bottom of the light generator 3, which can prevent the light generator 3 from being damaged due to improper cooperation of screws and gaskets and excessive installation during installation of the user circuit board, and also can quickly dissipate the heat generated by the light generator 3 from the lower shell 2 through the cooperation of the heat dissipation gasket 18 and the lower shell 2;

[0051] Further, a plurality of heat dissipation blocks 19 matched with the second PCB board 13 are arranged between the second PCB board 13 and the shell, which are arranged between the chip of the second PCB board 13 and the shell, and can not only prevent shock and avoid scratching the chip due to internal loosening, but also can assist in rapid heat dissipation through the inner surface of the shell;

[0052] Finally, the one-way heat dissipation hole 20 is arranged below the rear of the shell, which prevents dust from entering while dissipating heat, and also ensures the stability of the internal pressure of the shell and prevents thermal runaway.

[0053] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A CWDM optical packaging module, comprising a housing, characterized in that: The housing includes an upper housing and a lower housing. A PCB assembly and an optical transceiver assembly are housed in the cavity between the upper housing and the lower housing. The optical transceiver assembly includes an optical generator and an optical receiver. Corresponding pigtails are provided with the output end of the optical generator and the receiving end of the optical receiver through isolation sleeves. The front inner side of the housing with the two isolation sleeves is provided with a receiving groove. The PCB assembly and the optical transceiver assembly are each provided with a protection unit, and the protection unit includes an electrostatic isolation groove behind any of the aforementioned grooves; an installation position is provided between the two electrostatic isolation grooves.

2. The CWDM optical packaging module according to claim 1, characterized in that: The front end of the isolation sleeve is located on the front outer side of the outer shell.

3. The CWDM optical packaging module according to claim 1, characterized in that: The protection unit also includes a limiting member located between the output end of the light generator and the receiving end of the light receiver and the corresponding isolation sleeve, with corresponding slots provided for the two limiting members.

4. A CWDM optical packaging module according to claim 1, characterized in that: The PCB assembly includes a first PCB board correspondingly disposed on the optical receiver and a second PCB board correspondingly disposed after the optical generator and the optical receiver. The optical generator, the optical receiver, and the first PCB board are respectively connected to the second PCB board via a flexible PCB. The rear side of the second PCB board is connected to a pin header, the end of which is located on the rear side of the housing.

5. A CWDM optical packaging module according to claim 4, characterized in that: The protection unit also includes a heat-conducting block located on top of the light generator, and a heat dissipation groove is provided on the top inner side of the upper housing in conjunction with the heat-conducting block.

6. A CWDM optical packaging module according to claim 4, characterized in that: The protection unit also includes a heat dissipation pad located at the bottom of the light generator.

7. A CWDM optical packaging module according to claim 4, characterized in that: The protection unit also includes one or more heat sinks located between the second PCB board and the housing.

8. A CWDM optical packaging module according to claim 1, characterized in that: The protection unit also includes a one-way heat dissipation hole located at the lower rear of the housing.

Images