CN214750957U

CN214750957U - A coaxial optical device

Info

Publication number: CN214750957U
Application number: CN202120743524.5U
Authority: CN
Inventors: 李维; 郁建科; 夏伟
Original assignee: DONGGUAN XIANGTONG PHOTOELECTRIC TECHNOLOGY CO LTD
Current assignee: DONGGUAN XIANGTONG PHOTOELECTRIC TECHNOLOGY CO LTD
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-11-16
Anticipated expiration: 2031-04-12

Abstract

The utility model provides a coaxial optical device, comprising a base and an optical fiber plug, wherein the coaxial optical device further comprises: a tube cap, the tube cap is connected to the base and formed with the base an inner cavity, the inner cavity includes a first accommodating cavity and a through hole, the through hole is opened on the end face of the cap and communicates with the first accommodating cavity; wherein, the through hole and the first accommodating cavity A conical cavity is arranged at the connection of the cavity, and a lens is arranged in the conical cavity; an adjusting ring is connected to the end of the cap away from the base; the optical fiber plug is embedded in the adjusting ring inside the ring. This scheme reduces parts, optimizes the structure, and solves the problems of high production difficulty, many production processes and low production efficiency in the actual production process.

Description

Coaxial optical device

Technical Field

The utility model relates to a laser emitter spare technical field especially relates to a coaxial optical device.

Background

For the field of optical signal transmission in the field of communication technology at present, an optical fiber communication system mainly comprises a transmitter, an optical fiber and a receiver. The optical transmitter has the function of converting an electrical signal into an optical signal, the optical fiber serves as a carrying medium of the optical signal to ensure the high-quality transmission of the optical signal, and the optical receiver has the main function of converting the optical signal into the electrical signal. The core electro-Optical conversion and electro-Optical conversion devices in the Optical transmitter and the Optical receiver are tosa (transmitter Optical subassembly), rosa (receiver Optical subassembly), the former is called an Optical transmitter subassembly, and the latter is called an Optical receiver subassembly, respectively. With the demand and development of communication networks, the demand for integration and miniaturization of products is higher and higher, and a coaxial Optical device integrating a TOSA and a ROSA into one Optical device is called BOSA (Bi-Directional Optical SubAssembly), which is also called a coaxial single-fiber bidirectional Optical device for short.

The main structure of the existing optical device generally comprises a pipe cap part, a shell part sleeved on the pipe cap, an adjusting ring part and an optical fiber plug, so that the number of structural parts is large, the structure is complex, the production difficulty coefficient is large, the number of production processes is large, and the production efficiency is low in the actual production process.

Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a coaxial optical device, reduced the part, optimized the structure, solved in the actual production process, the production degree of difficulty coefficient is big, and production process is many, problem that production efficiency is low.

The utility model provides a technical scheme that technical problem adopted as follows:

a coaxial optical device, comprising: a base, and a fiber optic plug;

the pipe cap is connected to the base and forms an inner cavity together with the base, the inner cavity comprises a first accommodating cavity and a through hole, and the through hole is formed in the end face of the pipe cap and communicated with the first accommodating cavity; a conical cavity is arranged at the joint of the through hole and the first accommodating cavity, and a lens is arranged in the conical cavity;

the adjusting ring is connected to one end, away from the base, of the pipe cap;

the optical fiber plug is embedded in the adjusting ring.

Furthermore, the adjusting ring is a metal ring, and the adjusting ring is welded on the pipe cap and is coaxially arranged with the through hole.

Furthermore, a plurality of contact pins are arranged on the end face, away from the pipe cap, of the base, and the contact pins penetrate through the base and enter the first accommodating cavity;

and the contact pin is connected with a flexible welding plate.

Furthermore, the outer wall of the pipe cap and the outer wall of the base are connected with cooling fins.

Further, the optical fiber plug comprises a base, the base is fixedly arranged in the adjusting ring, a second accommodating groove is formed in the base, and an isolator is arranged in the second accommodating groove.

Further, the optical fiber plug further comprises:

the gland comprises a first connecting part and a second connecting part, the first connecting part is arranged away from the base, the second connecting part is arranged towards the base, and the second connecting part of the gland is positioned in the base;

the front cover is embedded on the first connecting part of the gland;

the ceramic sleeve is arranged inside the front cover;

one end of the optical port inserting core is sleeved inside the ceramic sleeve, and the other end of the optical port inserting core penetrates through the second connecting portion of the gland and is arranged in the base.

Further, the optical port ferrule and the isolator are located on the same axis.

Further, the base is interference fit with the adjustment ring.

Further, the first connecting portion is in interference fit with the front cover.

Further, one end of the optical port core insert is in interference fit with the ceramic sleeve.

The beneficial effect who adopts above-mentioned scheme is: the adjusting ring is connected to the end of the cap facing away from the base by connecting the cap to the base to form a part, so that the adjusting ring acts as a part. The optical fiber plug is embedded in the adjusting ring, so that the optical fiber plug is used as a component. Therefore, the coaxial optical device consists of three large parts, namely a pipe cap, an adjusting ring and an optical fiber plug, and compared with a structure which needs to be added with a shell (pipe body) and is formed by assembling four large parts in the prior art, the coaxial optical device saves one part, simplifies the structure and can reduce 2 working procedures in production. Therefore, the production difficulty coefficient is reduced, the production procedures are reduced, and the production efficiency is improved. In order to simplify the structure, the pipe cap is connected with the base to form an inner cavity, the inner cavity comprises a first accommodating cavity and a through hole, and the through hole is formed in the end face of the pipe cap and communicated with the first accommodating cavity; the first accommodating cavity is used for arranging a DFB laser and a TEC temperature controller; the through-hole with the junction in first holding chamber is provided with the toper chamber, be provided with lens in the toper chamber, provide the accommodation space for lens through the toper chamber, the inner wall in toper chamber has the guide effect, makes things convenient for the installation of lens.

Drawings

Fig. 1 is an exploded view of the main body portion of an embodiment of a coaxial optical device of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the coaxial optical device of the present invention.

Fig. 3 is a cross-sectional view of an embodiment of a coaxial optical device of the present invention.

The numbers in the figure are: 10. a base; 20. a pipe cap; 21. a first accommodating cavity; 22. a through hole; 23. a tapered cavity; 30. an adjusting ring; 40. an optical fiber plug; 41. a base; 42. a second accommodating groove; 43. a gland; 44. a first connection portion; 45. a second connecting portion; 46. a front cover; 47. a ceramic bushing; 48. an optical port ferrule; 50. a lens; 60. inserting a pin; 70. a flexible welding plate; 80. and a heat sink.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. 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 the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. When an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

The existing optical device is generally composed of 4 parts, and the main structure of the existing optical device generally comprises a pipe cap, a base part, a shell (circular pipe body) part sleeved on the pipe cap, an adjusting ring part and an optical fiber plug, so that the existing optical device has the defects of multiple structural parts, complex structure, large production difficulty coefficient, multiple production procedures and low production efficiency in the actual production process.

As shown in fig. 1 and 2, in order to solve the above problem, the present invention provides a coaxial optical device, including: a base 10 and a cap 20, a fiber optic plug 40, and an adjustment ring 30. The base 10 of the present embodiment is cylindrical, and for convenience of description, the axial direction of the base 10 is taken as the axial direction in the structural description. One axial end of the base 10 serves as a front end, and the other axial end serves as a rear end. As shown in fig. 1 and 3, the cap 20 is connected to the base 10, and forms an inner cavity with the base 10, specifically, the cap 20 is connected to the front end of the base 10. The inner cavity comprises a first accommodating cavity 21 and a through hole 22, and the through hole 22 is formed in the end face of the pipe cap 20 and communicated with the first accommodating cavity 21. The first accommodating cavity 21 is a cylindrical accommodating cavity, and the inner diameter of the first accommodating cavity 21 is larger than that of the through hole 22. A conical cavity 23 is arranged at the joint of the through hole 22 and the first accommodating cavity 21, and a lens 50 is arranged in the conical cavity 23. Specifically, the edge of the outer wall of the lens 50 can be set to be an inclined plane matched with the tapered cavity 23, so that the lens 50 can be directly arranged in the tapered cavity 23, in addition, the lens 50 can enter the through hole 22 through the guidance of the tapered cavity 23, the outer wall of the front end of the lens 50 can be embedded in the through hole 22, and the rear end of the lens 50 is arranged in the tapered cavity 23, so that the tapered cavity 23 increases the accommodating space, and the lens 50 is convenient to install. The adjusting ring 30 is connected to an end of the pipe cap 20 facing away from the base 10; the fiber optic plug 40 is embedded within the adjusting ring 30.

As shown in fig. 3, the pipe cap 20 is connected to the base 10 to form a component, and the adjusting ring 30 is connected to an end of the pipe cap 20 facing away from the base 10, so that the adjusting ring 30 is a component. The fiber optic plug 40 is embedded within the adjusting ring 30 such that the fiber optic plug 40 is a component. Therefore, the coaxial optical device consists of three large parts, namely the pipe cap 20, the adjusting ring 30 and the optical fiber plug 40, and compared with a structure which is formed by assembling four large parts by adding a shell (a pipe body) in the prior art, the coaxial optical device saves one part, simplifies the structure and can reduce 2 working procedures in production. Therefore, the production difficulty coefficient is reduced, the production procedures are reduced, and the production efficiency is improved. In order to simplify the structure, the pipe cap 20 is connected with the base 10 to form an inner cavity, the inner cavity comprises a first accommodating cavity 21 and a through hole 22, and the through hole 22 is formed in the end face of the pipe cap 20 and is communicated with the first accommodating cavity 21; the first accommodating cavity 21 is used for accommodating a DFB laser and a TEC temperature controller (not shown in the figure); the DFB laser is arranged at one end of the TEC temperature controller, and the other end of the TEC temperature controller is connected with the base 10. The junction of through-hole 22 with first holding chamber 21 is provided with toper chamber 23, be provided with lens 50 in the toper chamber 23, for lens 50 provides the accommodation space through toper chamber 23, the inner wall in toper chamber 23 has the guide effect, makes things convenient for lens 50's installation.

In the specific structure of this embodiment: the adjusting ring 30 is a metal ring, and the adjusting ring 30 is welded on the pipe cap 20 and is coaxially arranged with the through hole 22. The adjusting ring 30 is welded to the cap 20, so that the fixing of the adjusting ring 30 is more firm.

As shown in fig. 2, a plurality of pins 60 are disposed on an end surface of the base 10 facing away from the cap 20, and the pins 60 penetrate through the base 10 and enter into the first receiving cavity 21. The pin 60 can be connected to the component in the first receiving cavity 21 after entering the first receiving cavity 21. A flexible solder plate 70 is attached to the pin 60. The flexible solder plate 70 is used for mating connection with the PCB board of the module.

As shown in fig. 2 and 3, heat dissipation fins 80 are attached to the outer wall of the cap 20 and the outer wall of the base 10. The heat sink 80 is the outer wall of the half-wrapped pipe cap 20 and the outer wall of the base 10. Therefore, when heat is generated in the pipe cap 20, the heat can be dissipated in time through the heat dissipation fins 80, and the components in the inner cavity are prevented from being damaged due to the concentrated heat in the pipe cap 20.

As shown in fig. 1 and 3, the optical fiber plug 40 in the present embodiment includes a base 41, the base 41 is fixedly disposed in the adjusting ring 30, a second receiving groove 42 is disposed in the base 41, and an isolator (not shown) is disposed in the second receiving groove 42. The base 41 is an interference fit with the adjustment ring 30. The structure between the base 41 and the adjusting ring 30 is more compact, the size of the optical device is further reduced, the disengagement force between the base 41 and the adjusting ring 30 meets more than 100N, and the coaxial packaging requirement of higher reliability is met.

In this embodiment, the specific structure of the optical fiber plug 40 further includes: a gland 43, a front cover 46, a ceramic sleeve 47, and a port insert 48. The gland 43 comprises a first connecting part 44 deviating from the base 10 and a second connecting part 45 facing the base 10, specifically, the first connecting part 44 is arranged at the front end of the gland 43, and the second connecting part 45 is arranged at the rear end of the gland 43. The second connecting portion 45 of the pressing cover 43 is located in the base 41, specifically, the second connecting portion 45 is a circular boss arranged on the rear end face of the pressing cover 43, the second connecting portion 45 in the shape of the circular boss is located in the base 41 during assembly, the front end of the base 41 can abut against the rear end face of the pressing cover 43, and therefore the second connecting portion 45 can limit during assembly. The front cover 46 is fitted to the first connection portion 44 of the pressing cover 43; the first connecting portion 44 is interference-fitted with the front cover 46. The structure is more compact, and the size of the optical device is further reduced. The ceramic bushing 47 is disposed inside the front cover 46; one end of the optical port ferrule 48 is sleeved inside the ceramic sleeve 47, and the other end of the optical port ferrule 48 penetrates through the second connecting portion 45 of the gland 43 and is disposed inside the base 41; specifically, the rear end of the optical port ferrule 48 is in interference fit with the base 41, and the front end of the optical port ferrule 48 is in interference fit with the ceramic sleeve 47. The coaxiality of all the components in the optical fiber plug 40 is guaranteed, the disengaging force among all the components can meet the requirement of more than 100N, and the coaxial packaging requirement with higher reliability is met.

The optical port ferrule 48 and the isolator are located on the same axis. Thus, the optical port ferrule 48, isolator, lens 50 and DFB laser in the present coaxial optical device are secured on the same axis.

In summary, the following steps: the adjusting ring 30 is attached to the end of the cap 20 facing away from the base 10 by attaching the cap 20 to the base 10 to form a part, such that the adjusting ring 30 acts as a part. The fiber optic plug 40 is embedded within the adjusting ring 30 such that the fiber optic plug 40 is a component. Therefore, the coaxial optical device consists of three large parts, namely the pipe cap 20, the adjusting ring 30 and the optical fiber plug 40, and compared with a structure which is formed by assembling four large parts by adding a shell (a pipe body) in the prior art, the coaxial optical device saves one part, simplifies the structure and can reduce 2 working procedures in production. Therefore, the production difficulty coefficient is reduced, the production procedures are reduced, and the production efficiency is improved. In order to simplify the structure, the pipe cap 20 is connected with the base 10 to form an inner cavity, the inner cavity comprises a first accommodating cavity 21 and a through hole 22, and the through hole 22 is formed in the end face of the pipe cap 20 and is communicated with the first accommodating cavity 21; the first accommodating cavity 21 is used for arranging a DFB laser and a TEC temperature controller; the junction of through-hole 22 with first holding chamber 21 is provided with toper chamber 23, be provided with lens 50 in the toper chamber 23, for lens 50 provides the accommodation space through toper chamber 23, the inner wall in toper chamber 23 has the guide effect, makes things convenient for lens 50's installation.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A coaxial optical device comprises a base and an optical fiber plug, and is characterized by further comprising:

the optical fiber plug is embedded in the adjusting ring.

2. The coaxial optical device as claimed in claim 1, wherein the adjusting ring is a metal ring, and the adjusting ring is welded on the cap and is disposed coaxially with the through hole.

3. The coaxial optical device as claimed in claim 1, wherein a plurality of pins are disposed on an end surface of the base facing away from the cap, and the pins penetrate through the base and enter the first receiving cavity;

and the contact pin is connected with a flexible welding plate.

4. A coaxial optical device as defined in claim 1, wherein heat sinks are attached to the outer wall of said cap and said outer wall of said base.

5. The coaxial optical device as claimed in claim 1, wherein the optical fiber plug comprises a base, the base is fixedly disposed in the adjusting ring, a second receiving groove is disposed in the base, and an isolator is disposed in the second receiving groove.

6. The coaxial optical device of claim 5, wherein the fiber optic plug further comprises:

the front cover is embedded on the first connecting part of the gland;

the ceramic sleeve is arranged inside the front cover;

7. The coaxial optical device of claim 6, wherein the optical port ferrule and the isolator are located on the same axis.

8. The coaxial optical device of claim 6, wherein the base is an interference fit with the adjustment ring.

9. A coaxial optical device according to claim 6, wherein the first connection portion is an interference fit with the front cover.

10. The coaxial optical device as claimed in claim 6, wherein one end of the optical port ferrule is in interference fit with the ceramic sleeve.