阅读说明：本技术 一种光模块 (Optical module ) 是由 郝鹏涛 柯健 于 2019-07-30 设计创作，主要内容包括：本发明公开了一种光模块,包括光器件、PCBA板及机械部件,光器件至少包括光发射次模块、光接收次模块,光发射次模块包括第一光纤连接器,第一光纤连接器包括第一外壳、第二外壳、第一陶瓷插芯和插芯套筒,第一外壳采用绝缘塑料材质,第二外壳部分嵌入第一外壳中并与第一外壳连接,插芯套筒两端分别内嵌于第一外壳和第二外壳,第一陶瓷插芯内嵌于第二外壳并部分嵌入所述插芯套筒中。本发明公开的光模块结构简单,其各零件的累计同轴度公差减小,光纤与陶瓷插芯的同轴度提高,光纤的传送质量都得到了提高,并且由于减少了零件,安装时工序较少,生产效率也得到了提高。(The invention discloses an optical module which comprises an optical device, a PCBA board and mechanical parts, wherein the optical device at least comprises a light emission sub-module and a light receiving sub-module, the light emission sub-module comprises a first optical fiber connector, the first optical fiber connector comprises a first shell, a second shell, a first ceramic ferrule and a ferrule sleeve, the first shell is made of insulating plastics, the second shell is embedded into the first shell and connected with the first shell, two ends of the ferrule sleeve are respectively embedded into the first shell and the second shell, and the first ceramic ferrule is embedded into the second shell and partially embedded into the ferrule sleeve. The optical module disclosed by the invention has a simple structure, the accumulated coaxiality tolerance of each part is reduced, the coaxiality of the optical fiber and the ceramic ferrule is improved, the transmission quality of the optical fiber is improved, and the parts are reduced, so that the mounting process is fewer, and the production efficiency is also improved.)

1. An optical module, includes optical device, PCBA board and mechanical component, optical device includes the optical transmitter submodule piece at least, receives the submodule piece, its characterized in that: the OSM comprises a first optical fiber connector, the first optical fiber connector comprises a first shell, a second shell, a first ceramic ferrule and a ferrule sleeve, the first shell is made of insulating plastic, the second shell is embedded into the first shell and connected with the first shell, two ends of the ferrule sleeve are embedded into the first shell and the second shell respectively, and the first ceramic ferrule is embedded into the second shell and partially embedded into the ferrule sleeve.

2. The optical module of claim 1, wherein the optical sub-module comprises a second optical fiber connector, the second optical fiber connector comprises a third housing and a second ceramic ferrule, the third housing is integrally formed by an insulating plastic material, a ferrule hole axially penetrating is formed inside the third housing, one end of the third housing is connected with an external optical fiber, the other end of the third housing is provided with a TO-CAN package structure, and the second ceramic ferrule is arranged in the ferrule hole and respectively butted with the external optical fiber and the TO-CAN package structure.

3. The optical module of claim 1, wherein the second housing is a ferrule holder and the first housing is an adapter.

4. The optical module according to claim 3, wherein the ferrule base is provided with an external thread, and the adapter is provided with an internal thread matching the external thread.

5. The optical module of claim 3, wherein the ferrule base has a groove, and the adapter has a protrusion matching the groove.

6. The optical module of claim 1, wherein the second housing is a connector tube and the first housing is an integrated ferrule based adapter.

7. The optical module of claim 6, wherein the connection tube has external threads and the integrated ferrule based adapter has internal threads that mate with the external threads.

8. The optical module of claim 6, wherein the connecting tube has a groove formed therein, and the integrated ferrule based adapter has a protrusion that mates with the groove.

9. The light module of claim 1, wherein the tosa further comprises at least a base and a cap.

10. The optical module of claim 2 wherein said rosa further comprises at least a TO cap and a TO base.

Technical Field

The invention relates to the technical field of optical communication, in particular to an optical module.

Background

The optical module is an important component in an optical communication system, and has the function of simply realizing photoelectric conversion. In the process of long-distance signal transmission, when an electric signal is transmitted to a transmitting end of an optical module, the electric signal is converted into an optical signal, and the optical signal is transmitted to the optical module at the opposite end through an optical fiber; after receiving optical signals of other optical modules through optical fibers, the receiving end of the optical module converts the optical signals into electric signals, so that the long-distance transmission of the signals can be realized.

The Optical module is mainly composed of an Optical Subassembly (OSA) and a functional circuit (i.e., a circuit board assembly). The optical secondary module is electrically connected with the circuit board assembly, the circuit board assembly is connected with an external upper computer to realize power supply and electric signal transmission, and the optical secondary module is connected with light transmission media such as external optical fibers to realize light transmission. The Optical Subassembly mainly includes a Transmitter Optical Subassembly (TOSA), a Receiver Optical Subassembly (TOSA), and a Bi-directional Optical Subassembly (BOSA).

The tosa is a module that converts an electrical signal into an optical signal for transmission, and includes a laser as a light source and a fiber connector for coupling light out to an external optical fiber. In order to realize the optoelectronic isolation on both sides of the tosa, the conventional tosa structure is shown in fig. 1-1 and 1-2.

Fig. 1-1 is a schematic structural diagram of an optical fiber connector of an SFP type tosa, which includes an adapter 1 (sometimes also called a front clamping cylinder), a ferrule 3, a ferrule base 2, and a ferrule sleeve 5 (generally, a ferrule is a C-shaped ferrule in the prior art), where the adapter 1 and the ferrule base 2 are both metal members, and in order to achieve the isolation between the adapter 1 and the ferrule base 2, the optical fiber connector is provided with an O-shaped insulating ring 4 and an insulating rubber ring 6. During production and manufacturing, the ferrule sleeve 5 is firstly placed in the ferrule base 2, the ceramic ferrule 3 is pressed into the ferrule base 2 and the ferrule sleeve 5, the O-shaped insulating ring 4 is sleeved on the ferrule base 2, the adapter 1 is sleeved on the O-shaped insulating ring 4, and finally the insulating glue 6 is coated between the ferrule base 2 and the adapter 1.

Fig. 1-2 are schematic structural diagrams of an optical fiber connector of an XMD type tosa, which includes an adapter 1, a ferrule 3, a ferrule base 2, a ferrule sleeve 5, and a connecting tube 6 for accommodating a laser, wherein the adapter 1, the ferrule base 2, and the connecting tube 6 are metal members, and an insulating rubber ring 4 is disposed between the optical fiber connector and the connecting tube 6 for realizing optoelectronic isolation. During production and manufacturing, the ceramic ferrule 3 is pressed into the ferrule base 2, then the ferrule sleeve 5 is sleeved on one end of the ceramic ferrule 3, the adapter 1 is sleeved on the ferrule sleeve 5 and embedded into the ferrule base 2, and then the insulating rubber ring 4 and the connecting pipe 6 are sequentially sleeved on the other end of the ceramic ferrule 3.

The optical receiving sub-module converts optical signals into electric signals for transmission, and comprises an optical detector and an optical fiber connector for coupling light transmitted by an external optical fiber to the optical detector. In order to realize the optoelectronic isolation on both sides of the optical sub-receiving module, the optical fiber connector structure of the conventional optical sub-receiving module is shown in fig. 2-1 and 2-2.

Fig. 2-1 shows an optical fiber connector of an XMD type optical receive sub-module, which includes an adapter 2 (sometimes called a front ferrule), a ferrule 3, a base tube 1, and a ferrule sleeve 4 (a ferrule sleeve is generally used in the prior art, and is configured as a C type), wherein the adapter 2 is a metal member, an external optical fiber jumper is positioned by the ferrule sleeve 4, the adapter 2 is used TO connect the optical fiber jumper with the ferrule 3, and the base tube 1 is used TO connect with a TO-CAN. During production and manufacturing, the ceramic ferrule 3 is pressed into the base tube body 1, the ferrule sleeve 4 is sleeved on the ceramic ferrule 3 and inserted into the base tube body 1, and the adapter 2 is sleeved on the ferrule sleeve 4 and inserted into the base tube body 1.

Fig. 2-2 shows an optical fiber connector of an SFP type optical receive sub-module, which includes an adapter 2, a ferrule 3, a ferrule base 1, a ferrule sleeve 4 and a connecting pipe 5, wherein the adapter 2 is a metal member, an external optical fiber jumper is positioned by the ferrule sleeve 4, the adapter 2 is used for connecting the optical fiber jumper and the ferrule 3, and the connecting pipe 5 is used for connecting TO a TO-CAN. During production and manufacturing, the ceramic ferrule 3 is pressed into the ferrule base 1, the ferrule sleeve 4 is sleeved on the ceramic ferrule 3, a component formed by the ceramic ferrule 3, the ferrule base 1 and the ferrule sleeve 4 is sleeved in the adapter 2, and finally the connecting pipe 5 is connected with the ferrule base 2.

The optical fiber connectors of the optical transmitter sub-module and the optical receiver sub-module have more components, and all the components have coaxiality tolerance during processing, so that the more the components are, the larger the accumulative coaxiality tolerance is, the more the components are, the optical coupling efficiency can be greatly influenced, and the optical fiber transmission quality is reduced. In addition, the more parts inevitably bring about complicated procedures during installation, and the production efficiency is reduced.

Disclosure of Invention

The present invention has been made in view of the above problems, and aims to provide an optical module that overcomes or at least partially solves the above problems.

An optical module comprises an optical device, a PCBA board and mechanical parts, wherein the optical device at least comprises a light emission sub-module and a light receiving sub-module, the light emission sub-module comprises a first optical fiber connector, the first optical fiber connector comprises a first shell, a second shell, a first ceramic ferrule and a ferrule sleeve, the first shell is made of insulating plastics, the second shell is embedded into the first shell and connected with the first shell, two ends of the ferrule sleeve are respectively embedded into the first shell and the second shell, and the first ceramic ferrule is embedded into the second shell and partially embedded into the ferrule sleeve.

Furthermore, the optical receiving sub-module comprises a second optical fiber connector, the second optical fiber connector comprises a third shell and a second ceramic ferrule, the third shell is integrally formed by insulating plastic materials, a ferrule hole penetrating axially is formed in the third shell, one end of the third shell is connected with an external optical fiber, a TO-CAN packaging structure is arranged at the other end of the third shell, and the second ceramic ferrule is arranged in the ferrule hole and is respectively butted with the external optical fiber and the TO-CAN packaging structure.

Further, the second shell is a ferrule base, and the first shell is an adapter.

Furthermore, the ferrule base is provided with an external thread, and the adapter is provided with an internal thread matched with the external thread.

Furthermore, a groove is formed in the insertion core base, and a protrusion matched with the groove is arranged on the adapter.

Further, the second shell is a connecting pipe, and the first shell is an integrated ferrule base type adapter.

Furthermore, the connecting pipe is provided with an external thread, and the integrated inserting core base type adapter is provided with an internal thread matched with the external thread.

Furthermore, a groove is formed in the connecting pipe, and a protrusion matched with the groove is arranged on the integrated inserting core base type adapter.

Further, the tosa at least comprises a base and a cap.

Further, the optical subassembly module at least comprises a TO cap and a TO base.

Based on the technical scheme, compared with the prior art, the invention has the beneficial effects that:

the invention discloses an optical module, which comprises an optical device, a PCBA board and mechanical parts, wherein the optical device at least comprises a light emission sub-module and a light receiving sub-module, the light emission sub-module comprises a first optical fiber connector, the first optical fiber connector comprises a first shell, a second shell, a first ceramic ferrule and a ferrule sleeve, the first shell is made of insulating plastic materials and can be directly contacted with the second shell, compared with the prior art, parts such as an insulating rubber ring for realizing photoelectric isolation and the like are omitted, the accumulated coaxial tolerance of each part is reduced, the coaxiality of an optical fiber and the ceramic ferrule is improved, and the transmission quality of the optical fiber is improved; the number of parts is reduced, the number of working procedures is less during installation, and the production efficiency is improved.

Drawings

FIG. 1-1 is a schematic diagram of a fiber connector of an SFP-type tosa in the prior art;

FIG. 1-2 is a schematic diagram of a fiber connector of an XMD tosa in the background art;

FIG. 2-1 is a schematic diagram of a fiber connector of an XMD tosa in the background art;

FIG. 2-2 is a schematic diagram of a fiber connector of an SFP-type tosa in the background art;

FIG. 3 is a schematic diagram of a light module in some embodiments;

FIG. 4-1 is a schematic diagram of a fiber optic connector of an SFP-type tosa in some embodiments;

FIG. 4-2 is a schematic diagram of a fiber optic connector of an SFP-type tosa in some embodiments;

FIG. 5-1 is a schematic diagram of a fiber optic connector of an XMD style tosa in some embodiments;

FIG. 5-2 is a schematic diagram of a fiber optic connector of an XMD style tosa in some embodiments;

FIG. 6-1 is a schematic diagram of a fiber optic connector of an SFP-type optical receive sub-module in some embodiments;

FIG. 6-2 is a schematic diagram of a fiber optic connector of an XMD type optical receive sub-module in some embodiments;

FIG. 7 is a schematic diagram of the construction of a tosa in some embodiments;

fig. 8 is a schematic structural diagram of the rosa in some embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In some embodiments, as shown in fig. 3, 7 and 5-1, the optical module includes an optical device including at least a transmitter optical subassembly 1 and a receiver optical subassembly 2, a PCBA board 00, and mechanical components. The PCBA board 00 includes a plurality of functional chips 01, functional circuits, and the like. The mechanical components (not shown) typically include, for example, a housing, electrical interface fingers, fiber optic interfaces, and the like.

The optical module may include an XMD type tosa or an SFP type tosa, etc.

In some embodiments, the optical module includes an XMD-type tosa 1, and in conjunction with fig. 7, the tosa 1 includes a first fiber connector, a TO base 12, a TO cap 13, a tube body 14, and a connection ring 15. The TO base 12, the TO cap 13, the tube 14 and the connection ring 15 may be of some conventional construction, and the first optical fiber connector will now be described in detail.

In some embodiments, as shown in fig. 5-1, the first optical fiber connector includes a first housing 10, a second housing 20, a ferrule sleeve 40, and a ferrule 30, the first housing 10 is an integrated ferrule base adapter, the second housing 20 is a connecting tube, the integrated ferrule base adapter 10 is made of an insulating plastic material, the connecting tube 20 is made of a metal material, the connecting tube 20 is partially embedded in the integrated ferrule base adapter 10 and connected with the integrated ferrule base adapter 10, two ends of the ferrule sleeve 40 are respectively embedded in the integrated ferrule base adapter 10 and the connecting tube 20, and the ferrule 30 is embedded in the connecting tube 20 and partially embedded in the ferrule sleeve 40. The connecting pipe 20 is provided with an external thread 201, the integrated ferrule base type adapter 10 is provided with an internal thread 101 matched with the external thread 201, the connecting pipe 20 is connected with the integrated ferrule base type adapter 10 through threads, and the connecting pipe 20 is screwed into the integrated ferrule base type adapter 10 during manufacturing, so that the anti-disengagement effect can be achieved.

As shown in fig. 5-2, a groove 202 may be provided on the connection tube 20, and a protrusion 102 matching with the groove 202 is provided on the integrated ferrule base adapter 10, and during manufacturing, the protrusion 102 is only required to be snapped into the groove 202, and may also play a role of preventing disengagement.

In the optical module disclosed in this embodiment, the first optical fiber connector of the tosa 1 and the ferrule base adapter 10 are made of insulating plastic materials and can directly contact the connecting pipe 20, and compared with the prior art, the optical module uses fewer parts such as an O-shaped insulating ring and a ferrule base, the accumulated coaxiality tolerance of each part is reduced, the coaxiality between the optical fiber and the ceramic ferrule 30 is improved, and the transmission quality of the optical fiber is improved; two parts are reduced, the process is less during installation, and the production efficiency is improved.

In some embodiments, if the optical module adopts an SFP-type tosa, some creative designs can still be provided, so that on the basis of reducing the number of optical module parts, photoelectric isolation is realized, the optical fiber transmission quality is ensured, and the production efficiency of products is improved. As shown in fig. 4-1, the first optical fiber connector of the tosa includes a first housing 10, a second housing 20, a ferrule sleeve 40 and a ferrule 30, wherein the first housing 10 is an adapter, the second housing 20 is a ferrule base, the adapter 10 is made of an insulating plastic material, the ferrule base 20 is made of a metal material, the ferrule base 20 is partially embedded in the adapter 10 and connected with the adapter 10, two ends of the ferrule sleeve 40 are respectively embedded in the adapter 10 and the ferrule base 20, and the ferrule 30 is embedded in the ferrule base 20 and partially embedded in the ferrule sleeve 40. The inserting core base 20 is provided with an external thread 201, the adapter 10 is provided with an internal thread 101 matched with the external thread 201, the inserting core base 20 is connected with the adapter 10 through threads, and the inserting core base 20 is screwed into the adapter 10 during manufacturing, so that the anti-disengaging effect can be achieved. Or as shown in fig. 4-2, the ferrule base 20 is provided with a groove 202, and the adapter 10 is provided with a protrusion 102 matching with the groove 202, so that the protrusion 102 is only required to be clamped into the groove 202 during manufacturing, and the anti-disengagement function can also be achieved.

In the optical module disclosed in this embodiment, the first optical fiber connector of the tosa 1 and the adapter 10 are made of insulating plastic materials, and can directly contact with the ferrule base 20, and compared with the prior art, the optical module uses fewer parts such as an O-shaped insulating ring and an insulating rubber ring, so that the accumulated coaxiality tolerance of the parts is reduced, the coaxiality between the optical fiber and the ceramic ferrule 30 is improved, and the transmission quality of the optical fiber is improved; and parts are reduced, the process is less during installation, and the production efficiency is improved.

In other embodiments, in addition to improvements to the light module including the tosa 1, improvements may be made to the rosa 2. The optical receive sub-module may also include an XMD type or an SFP type. As shown in fig. 8, the optical sub-module 2 includes a second optical fiber connector, a TO stem 23, a TO cap 22, and the like.

As shown in fig. 6-2, the second optical fiber connector of the XMD type optical receive sub-module includes a third housing 50 and a ferrule ceramic 60, the third housing 50 is integrally formed by an insulating plastic material, a ferrule hole 501 axially penetrating is formed in the third housing 50, one end of the third housing is connected TO an external optical fiber, the other end of the third housing is provided with a TO-CAN package structure 502, and the ferrule ceramic 60 is disposed in the ferrule hole 501 and respectively connected TO the external optical fiber and the TO-CAN package structure 502. The TO-can (transistor Outline can) is a coaxial can type package, the third shell of which is generally cylindrical, and the TO-can (transistor Outline can) is a semiconductor laser packaging mode in the field of optical communication, and is widely applied TO optical fiber communication and optical fiber sensing at present. The TO-CAN packaged semiconductor laser has the characteristics of simple manufacturing process, suitability for large-scale production, small volume, low loss, long service life and the like. TO-Can packages typically include a TO header, TO cap, etc. inside the TO-Can package.

In the optical module disclosed in this embodiment, the third housing 50 is made of an insulating plastic material, the third housing 50 is designed by integral molding, and the third housing 50 replaces the original adapter and ferrule base, so that compared with the existing XMD optical fiber connector, parts such as a C-type insulating ring and a ferrule base are used less, the accumulated coaxiality tolerance of each part is greatly reduced, the coaxiality of the optical fiber and the second ceramic ferrule 60 is improved, and the transmission quality of the optical fiber is improved; two parts are reduced, the second ceramic ferrule 60 only needs to be pressed into the third shell 50 during installation, and the production efficiency is improved.

In some embodiments, if the optical module adopts an SFP-type optical receive sub-module, some creative designs can still be provided, and on the basis of reducing the number of optical module parts, photoelectric isolation is realized, the optical fiber transmission quality is ensured, and the production efficiency of products is improved.

As shown in fig. 6-1, the second optical fiber connector of the optical receive sub-module 2 includes a third housing 50 and a ceramic ferrule 60, the third housing 50 is integrally formed by insulating plastic material, a ferrule hole 501 axially penetrating is formed in the third housing 50, one end of the third housing is connected TO an external optical fiber, the other end of the third housing is provided with a TO-CAN package structure 502, and the ceramic ferrule 60 is disposed in the ferrule hole 501 and is respectively butted with the external optical fiber and the TO-CAN package structure 502.

In the optical module disclosed in this embodiment, the third housing 50 is made of an insulating plastic material, the third housing 50 is integrally designed, and the third housing 50 replaces the original adapter, ferrule base and connecting tube, so that compared with the existing SFP-type optical fiber connector, the optical module uses less C-type insulating rings, ferrule bases and connecting tubes, the accumulated coaxiality tolerance of each part is greatly reduced, the coaxiality of the optical fiber and the second ceramic ferrule 60 is improved, and the transmission quality of the optical fiber is improved; three parts are reduced, and the second ceramic ferrule 60 only needs to be pressed into the third shell 50 during installation, so that the production efficiency is improved.

In some embodiments, as shown in fig. 6-1, the inboard end port of the ferrule bore 501 is provided with a guide ramp 5011. The guide inclined plane 5011 can play a role in guiding when an optical fiber is inserted, is more convenient and fast to assemble, and improves the production efficiency.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".