Optical module

Abstract

The utility model discloses an optical module which is composed of an upper shell, a lower shell, a pin header, a PCB, an ROSA tail fiber optical assembly and a TOSA tail fiber optical assembly, an electrical interface adopts an L-shaped pin header, an optical interface adopts a tail fiber type, different optical interfaces are convenient to install and customize, the optical module is convenient and flexible to use, and the packaging size is small. The tail fiber optical assembly is fixed and protected through the tail fiber positioning groove, the clamping ring groove and the tail fiber sheath groove. The shell is made of a metal material and is filled with heat-conducting glue, so that the optical module effectively solves the problem of module heat dissipation, and the metal shell realizes the electromagnetic interference and shielding functions of the optical module.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical fiber communication, and specifically relates to a DWDM transceiver integrated optical module. Background Art

[0002] In the civilian and military fields, with the development of big data processing, communication technology, and the Internet of Things, high-capacity and high-density communication data needs to be transmitted, the integration degree requirement of the communication system is getting higher and higher, and the device density of the communication system is getting higher and higher.

[0003] The optical working wavelength of the DWDM (Dense Wavelength Division Multiplexing) optical module is 1528.38~1563.86nm, which is mainly applied to network devices such as switches and servers, and its maximum transmission distance can reach 120 kilometers. The DWDM optical module is the same as the ordinary optical module in that both belong to optical devices that realize the conversion between optical and electrical signals. The difference is that the DWDM optical module uses the DWDM technology to multiplex different wavelengths or several optical signals onto a single optical fiber for transmission, which can effectively save optical fiber resources. To achieve precise control of the optical wavelength, the DWDM optical module requires good heat dissipation characteristics. If the optical module has a high-temperature problem, the wavelength of the optical module will drift, resulting in the failure of the optical module. Summary of the Invention

[0004] The purpose of the utility model is to provide an optical module, whose electrical interface adopts a pin row and the optical interface adopts a pigtail type, which is convenient for installation and customization of different optical interfaces, is convenient and flexible to use, has a small package volume, and the outer shell uses a metal material to effectively solve the heat dissipation problem of the module, and the metal outer shell realizes the functions of electromagnetic interference and shielding of the optical module.

[0005] The utility model is realized by the following technical solutions:

[0006] An optical module is proposed, including an upper shell (7), a lower shell (3), and a PCBA board (4); the upper shell (7) and the lower shell (3) are assembled to form a space for limiting the PCB board (4) inside; it also includes pin headers (2), a ROSA pigtail optical component (6), and a TOSA pigtail optical component (5); wherein,

[0007] One end of the PCB board (4) is provided with pin header welding holes (41), and the other end is printed with TOSA pads (42) and ROSA pads (43);

[0008] The pin header (2) includes pin header horizontal pins (21) and pin header vertical pins (22), and the two are connected in an arc to be perpendicular to each other; the pin header vertical pins (22) are welded to the pin header welding holes (41);

[0009] The TOSA pigtail optical component (5) is composed of a TOSA flexible board pad (51), a TOSA housing (52), a TOSA snap ring (53), and a TOSA pigtail sheath (54); the TOSA flexible board pad (51) is welded to the TOSA pad (42).

[0010] The ROSA pigtail optical component (6) is composed of a ROSA flexible board pad (61), a ROSA housing (62), a ROSA snap ring (63), and a ROSA pigtail sheath (64); the ROSA flexible board pad (61) is welded to the ROSA pad (41).

[0011] One end of the lower shell (3) is provided with a pin positioning groove (31), and the other end extends outwards from the housing in parallel with a ROSA lower pigtail sheath groove (35) and a TOSA lower pigtail sheath groove (38); inside the housing of the lower shell (3), a ROSA lower snap ring groove (34) and a ROSA lower housing positioning groove (33) are sequentially arranged at positions corresponding to the ROSA lower pigtail sheath groove (35), and a TOSA lower snap ring groove (37) and a TOSA lower housing positioning groove (36) are sequentially arranged at positions corresponding to the TOSA lower pigtail sheath groove (38).

[0012] One end of the upper shell (7) extends outwards from the housing in parallel with a ROSA upper pigtail sheath groove (74) and a TOSA upper pigtail sheath groove (77); inside the housing of the upper shell (7), a ROSA upper snap ring groove (73) and a ROSA upper housing positioning groove (72) are sequentially arranged at positions corresponding to the ROSA upper pigtail sheath groove (77), and a TOSA upper snap ring groove (76) and a TOSA upper housing positioning groove (75) are sequentially arranged at positions corresponding to the TOSA upper pigtail sheath groove (77).

[0013] In some embodiments of the present utility model, the upper shell (7) and the lower shell (3) are made of a metal material.

[0014] In some embodiments of the present utility model, upper screw holes (71) are provided on both sides of the upper shell (7), and lower screw holes (32) are provided on both sides of the lower shell (3).

[0015] In some embodiments of the present utility model, optical module fixing posts (39) are arranged on the outer side of the housing of the lower shell (3).

[0016] In some embodiments of the present utility model, an optical module identification area (78) is arranged on the outer side of the upper shell (7).

[0017] In some embodiments of the present utility model, after the ROSA upper housing positioning groove (72) and the ROSA lower housing positioning groove (33) are assembled, they define the ROSA housing (62) and thermal conductive glue is filled.

[0018] The positioning grooves (75) of the TOSA upper housing and the positioning grooves (36) of the TOSA lower housing define the TOSA housing (52) and are filled with thermal conductive adhesive after assembly.

[0019] Compared with the prior art, the advantages and positive effects of the present utility model are as follows: The optical module structure scheme proposed by the present utility model has a higher component density, a smaller package size, and a wider operating temperature range compared with civilian DWDM modules; it has good thermal design, and the temperature tolerance range of the product is -40°C to 85°C, and it can be applied to special fields with harsh temperature environments; it can be made into a single-channel transceiver integrated optical module product, which is mainly used in satellite and radar optical communication data systems.

[0020] After reading the detailed description of the embodiments of the present utility model in conjunction with the accompanying drawings, other features and advantages of the present utility model will become clearer. Description of the Drawings

[0021] The accompanying drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an improper limitation of the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0022] Figure 1 is an exploded view of the optical module given by the present utility model;

[0023] Figure 2 is the external view of the optical module given by the present utility model Figure 1 ;

[0024] Figure 3 is the external view of the optical module given by the present utility model Figure 2 ;

[0025] Figure 4 is the view of the pin header in the optical module given by the present utility model;

[0026] Figure 5 is the view of the lower housing of the optical module given by the present utility model Figure 1 ;

[0027] Figure 6 is the view of the lower housing of the optical module given by the present utility model Figure 2 ;

[0028] Figure 7 is the view of the PCB board of the optical module given by the present utility model;

[0029] Figure 8 is the view of the upper housing of the optical module given by the present utility model Figure 1 ;

[0030] Figure 9 is the top shell view of the optical module given by the present utility model Figure 2 ;

[0031] Figure 10 is the view of the TOSA / ROSA pigtail optical component of the optical module given by the present utility model;

[0032] Reference numerals:

[0033] 1, screw;

[0034] 2, pin header; 21, horizontal pins of the pin header; 22, vertical pins of the pin header;

[0035] 3, lower shell; 31, pin header positioning groove; 32, lower screw hole; 33, ROSA lower housing positioning groove; 34, ROSA lower snap ring groove; 35, ROSA lower pigtail sheath groove; 36, TOSA lower housing positioning groove; 37, TOSA lower snap ring groove; 38, TOSA lower pigtail sheath groove; 39, optical module fixing post;

[0036] 4, PCB board; 41, pin header welding hole; 42, TOSA pad; 43, ROSA pad;

[0037] 5, TOSA pigtail optical component; 51, TOSA flexible board pad; 52, TOSA housing; 53, TOSA snap ring; 54, pigtail sheath;

[0038] 6, ROSA pigtail optical component; 61, ROSA flexible board pad; 62, ROSA housing; 63, ROSA snap ring; 64, pigtail sheath;

[0039] 7, top shell; 71, upper screw hole; 72, ROSA upper housing positioning groove; 73, ROSA upper snap ring groove; 74, ROSA upper pigtail sheath groove; 75, TOSA upper housing positioning groove; 76, TOSA upper snap ring groove; 77, TOSA upper pigtail sheath groove; 78, optical module identification area.

[0040] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0042] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0043] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] The optical module proposed by the present utility model, as Figures 1 to 10 shown, is composed of an upper shell 7, a lower shell 3, pin headers 2, a PCB board 4, a TOSA (optical transmitting component) pigtail optical component 5, and a ROSA (optical receiving component) pigtail optical component 6.

[0045] Specifically, the pin header 2 includes a pin header horizontal pin 21 and a pin header vertical pin 22, which are connected in an arc to be perpendicular to each other. Among them, the pin header horizontal pin 21 is the electrical pin of the optical module, providing signal input / output and power supply for the optical module.

[0046] One end of the PCB board 4 is provided with a pin header soldering hole 41 for soldering the pin header vertical pin 22; the other end of the PCB board 4 is printed with a TOSA pad 42 and a ROSA pad 43. The optical receiving circuit, the optical transmitting circuit, and their peripheral circuits are all integrated on the PCB board 4.

[0047] The TOSA pigtail optical component 5 is composed of a TOSA flexible board pad 51, a TOSA housing 52, a TOSA snap ring 53, and a TOSA pigtail sheath 54; the light emitting device is installed in the TOSA housing 52, one end of the TOSA flexible board pad 51 is connected to the light emitting device, and the other end is printed with electrical pins; the TOSA snap ring 53 is connected between the TOSA housing 52 and the TOSA pigtail sheath 54.

[0048] The ROSA pigtail optical component 6 is composed of a ROSA flexible board pad 61, a ROSA housing 62, a ROSA snap ring 63, and a ROSA pigtail sheath 64; the light emitting device is installed in the ROSA housing 62, one end of the ROSA flexible board pad 61 is connected to the light emitting device, and the other end is printed with electrical pins; the ROSA snap ring 63 is connected between the ROSA housing 62 and the ROSA pigtail sheath 64.

[0049] One end of the lower housing 3 is provided with a pin positioning groove 31, and the opposite end extends outwards from the housing in parallel to form a ROSA lower fiber optic cable sheath groove 35 and a TOSA lower fiber optic cable sheath groove 38; inside the housing, a ROSA lower snap ring groove 34 and a ROSA lower housing positioning groove 33 are sequentially arranged at positions corresponding to the ROSA lower fiber optic cable sheath groove 35, and a TOSA lower snap ring groove 37 and a TOSA lower housing positioning groove 36 are sequentially arranged at positions corresponding to the TOSA lower fiber optic cable sheath groove 38. Upper screw holes 32 are opened on both sides of the lower housing 3, and an optical module fixing post 39 is arranged on the outer side of the housing. The optical module fixing post 39 is used for the installation and fixation of the optical module to ensure the mechanical strength of the optical module fixation.

[0050] One end of the upper housing 7 extends outwards from the housing in parallel to form a ROSA upper fiber optic cable sheath groove 74 and a TOSA upper fiber optic cable sheath groove 77; inside the housing, a ROSA upper snap ring groove 73 and a ROSA upper housing positioning groove 72 are sequentially arranged at positions corresponding to the ROSA upper fiber optic cable sheath groove 74, and a TOSA upper snap ring groove 76 and a TOSA upper housing positioning groove 75 are sequentially arranged at positions corresponding to the TOSA upper fiber optic cable sheath groove 77. Upper screw holes 71 are opened on both sides of the upper housing 7, and the outer side of its housing is set as an optical module identification area 78.

[0051] When assembling the optical module, the TOSA flexible board pad 51 of the TOSA pigtail optical component 5 is welded to the TOSA pad of the PCB board 4 to realize the electrical connection between the transmitting optical path and the PCB board. The ROSA flexible board pad 61 of the ROSA pigtail optical fiber 6 is welded to the ROSA pad of the PCB board 4 to realize the electrical connection between the receiving optical path and the PCB board. The vertical pins of the pin header 2 are welded to the pin header welding holes 41 of the PCB board 4. The internal space formed after the upper shell 7 and the lower shell 7 are snap-fitted and assembled is used to limit the PCB board 4. The horizontal pins 21 of the pin header 2 extend out of the shell from the pin header positioning groove 31. The ROSA lower housing positioning groove 33 and the ROSA upper housing positioning groove 72 form a positioning groove for limiting the ROSA housing 62, and thermal conductive glue is filled between them to realize the heat dissipation of the ROSA. The ROSA lower retaining ring groove 34 and the ROSA upper retaining ring groove 73 form a positioning groove for the ROSA retaining ring 63 to realize the positioning and fixing of the ROSA, ensuring that the ROSA can withstand severe mechanical vibrations. The ROSA lower pigtail sheath groove 35 and the ROSA upper pigtail sheath groove 74 protect the ROSA pigtail sheath 64 from external damage. The TOSA lower housing positioning groove 36 and the TOSA upper housing positioning groove 75 form a positioning groove for limiting the TOSA housing 52, and thermal conductive glue is filled between them to realize the heat dissipation of the TOSA. The TOSA lower retaining ring groove 37 and the TOSA upper retaining ring groove 76 form a positioning groove for the TOSA retaining ring 53 to realize the positioning and fixing of the TOSA, ensuring that the TOSA can withstand severe mechanical vibrations. The TOSA lower pigtail sheath groove 38 and the TOSA upper pigtail sheath groove 77 protect the TOSA pigtail sheath 54 from external damage. The screw 1 passes through the lower screw hole 32 and the upper screw hole 71 to fix the lower shell 3 and the upper shell 7.

[0052] In the DWDM transceiver integrated optical module solution provided by the present utility model above, the upper shell 7 and the lower shell 3 are used to encapsulate the optical module, both of which are made of metal materials. Thermal conductive glue is potted between the TOSA pigtail optical component 5 and the ROSA pigtail optical component 6 and the housing, so that the optical module has good heat dissipation performance, shielding performance and anti-electromagnetic interference ability. The pin header 2 is used as the electrical interface of the optical module for the input and output of the electrical signals of the optical module, and its electrical performance meets the requirements of high-speed transmission. The TOSA pigtail optical component 6 realizes the conversion of electrical signals into optical signals, and the ROSA pigtail optical component 5 realizes the conversion of optical signals into electrical signals. The ROSA upper / lower housing positioning grooves 72 / 33, the ROSA upper / lower retaining ring grooves 73 / 34 and the ROSA upper / lower pigtail sheath grooves 74 / 35, the TOSA upper / lower housing positioning grooves 75 / 36, the ROSA upper / lower retaining ring grooves 76 / 37 and the ROSA upper / lower pigtail sheath grooves 77 / 38 are used to limit and protect the ROSA / TOSA pigtail optical components 5 / 6 to protect the reliability of the optical components and the optical cables.

[0053] It should be noted that the above description is not a limitation to the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An optical module, comprising an upper shell (7), a lower shell (3) and a PCB board (4); the upper shell (7) and the lower shell (3) are assembled to form a space defining the PCB board (4); characterized in that: It also includes a pin header (2), a ROSA pigtail optical component (6) and a TOSA pigtail optical component (5); wherein: A pin row welding hole (41) is provided at one end of the PCB board (4), and a TOSA soldering pad (42) and a ROSA soldering pad (43) are printed at the other end; The pin row (2) comprises a pin row horizontal pin (21) and a pin row vertical pin (22), which are connected by an arc transition and are perpendicular to each other; the pin row vertical pin (22) is welded to the pin row welding hole (41); The TOSA pigtail optical component (5) is composed of a TOSA flexible board soldering pad (51), a TOSA housing (52), a TOSA clamping ring (53) and a TOSA pigtail sheath (54); the TOSA flexible board soldering pad (51) is soldered to the TOSA soldering pad (42); The ROSA pigtail optical component (6) is composed of a ROSA flexible board soldering pad (61), a ROSA housing (62), a ROSA clamping ring (63) and a ROSA pigtail sheath (64); the ROSA flexible board soldering pad (61) is soldered to the ROSA soldering pad (43); A pin row positioning groove (31) is formed at one end of the lower shell (3), and a ROSA lower pigtail sheath groove (35) and a TOSA lower pigtail sheath groove (38) are extended outward from the shell in parallel at the other end; inside the shell of the lower shell (3), a ROSA lower retaining ring groove (34) and a ROSA lower shell positioning groove (33) are arranged in sequence relative to the position of the ROSA lower pigtail sheath groove (35), and a TOSA lower retaining ring groove (37) and a TOSA lower shell positioning groove (36) are arranged in sequence relative to the position of the TOSA lower pigtail sheath groove (38); One end of the upper shell (7) extends outward from the shell to form a ROSA upper pigtail sheath groove (74) and a TOSA upper pigtail sheath groove (77) in parallel; inside the shell of the upper shell (7), a ROSA upper retaining ring groove (73) and a ROSA upper shell positioning groove (72) are arranged in sequence relative to the position of the ROSA upper pigtail sheath groove (74), and a TOSA upper retaining ring groove (76) and a TOSA upper shell positioning groove (75) are arranged in sequence relative to the position of the TOSA upper pigtail sheath groove (77).

2. The optical module according to claim 1, characterized in that: The upper shell (7) and the lower shell (3) are made of metal material.

3. The optical module according to claim 1, characterized in that: Upper screw holes (71) are formed on both sides of the upper shell (7), and lower screw holes (32) are formed on both sides of the lower shell (3).

4. The optical module according to claim 1, characterized in that: An optical module fixing column (39) is arranged on the outer side of the shell of the lower shell (3).

5. The optical module according to claim 1, characterized in that: An optical module identification area (78) is provided on the outer side of the upper shell (7).

6. The optical module according to claim 1, characterized in that: After the ROSA upper shell positioning groove (72) and the ROSA lower shell positioning groove (33) are assembled, the ROSA shell (62) is defined and filled with heat-conducting glue; After being assembled, the TOSA upper shell positioning groove (75) and the TOSA lower shell positioning groove (36) define the TOSA shell (52) and are filled with heat-conducting glue.

Images