CN103424817A - Optical fiber connecting assembly and photovoltaic conversion module used by same - Google Patents

Abstract

An optical fiber connection assembly, which includes two photoelectric conversion modules and a plurality of optical fibers connecting the two photoelectric conversion modules, the photoelectric conversion module includes a circuit board, a light receiving element and a light emitting element installed on the circuit board The cover connected to the circuit board and a plurality of first lenses installed on the cover, the cover is set on the light receiving element and the light emitting element, the plurality of first lenses are aligned with the ends of the plurality of optical fibers, and the plurality of first lenses A lens is optically coupled with the light-receiving element and the light-emitting element. A glue overflow hole is opened on the joint surface of the cover body and the circuit board. When the cover body is bonded to the circuit board, excess glue enters the glue overflow hole. The invention also provides a photoelectric conversion module. In the above-mentioned optical fiber connection assembly, since the cover body of the photoelectric conversion module is provided with a glue overflow hole on the surface close to the circuit board, when the cover body is bonded to the circuit board with glue, the excess glue enters the glue overflow hole to avoid Cover deflection caused by the process.

Description

Optical fiber connection assembly and photoelectric conversion module used therefor

technical field

The invention relates to an optical fiber connection assembly, in particular to an optical fiber connection assembly for converting and transmitting optical signals and a photoelectric conversion module used therein.

Background technique

In recent years, optical communication has a development trend of high speed and large capacity. When the optical fiber connector is used for optical signal transmission, it is necessary to use a photoelectric conversion module to convert the photoelectric signal. In the existing photoelectric conversion module, the cover body is fixed on the circuit substrate by glue and is located above the optical element, and the optical fiber connected to the photoelectric conversion module is installed on the cover body, and the lens installed in the cover body and the optical element light coupling. However, when the glue is cured and baked at high temperature, the cover body will be shifted due to excessive volume expansion or air mixed into the glue to generate air bubbles, which will lead to poor optical coupling between the optical component and the lens, and even make the photoelectric conversion The module fails, reducing the production yield.

Contents of the invention

In view of the above, it is necessary to provide an optical fiber connection assembly capable of increasing productivity and high optical coupling efficiency and a photoelectric conversion module used therein.

An optical fiber connection assembly, which includes two photoelectric conversion modules and a plurality of optical fibers connecting the two photoelectric conversion modules, the photoelectric conversion module includes a circuit board, a light receiving element and a light emitting element installed on the circuit board, The cover body of the circuit board and the plurality of first lenses installed on the cover body are bonded by glue, the cover body is set on the light receiving element and the light emitting element, the plurality of first lenses and the plurality of optical fibers The ends are aligned, the plurality of first lenses are optically coupled with the light-receiving element and the light-emitting element, and a glue overflow hole is opened on the joint surface of the cover body and the circuit board. When the cover body is bonded to the circuit board , excess glue enters the overflow hole.

A photoelectric conversion module, comprising a circuit board, a light-receiving element and a light-emitting element installed on the circuit board, a cover body bonded to the circuit board by glue, and a plurality of first lenses installed on the cover body, the The cover body is set on the light receiving element and the light emitting element, the plurality of first lenses are optically coupled with the light receiving element and the light emitting element, and a glue overflow hole is opened on the bonding surface of the cover body and the circuit board. When connecting to the circuit board, excess glue enters the glue overflow hole.

In the above-mentioned photoelectric conversion module, since the surface of the cover body close to the circuit board is provided with a glue overflow hole, when the cover body is bonded to the circuit board by glue, the excess glue enters the glue overflow hole to avoid the glue overflow hole due to the bonding process. The resulting offset of the cover ensures good optical coupling between the lens, the light-receiving element and the light-emitting element, and improves the transmission efficiency of the optical fiber.

Description of drawings

Fig. 1 is a schematic perspective view of an optical fiber connection assembly according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the photoelectric conversion module of the optical fiber connection assembly shown in FIG. 1 .

Description of main component symbols

Fiber Connector Components 100 Photoelectric conversion module 101 optical fiber 105 circuit board 10 Light receiving element 20 Light emitting element 30 Cover 40 first lens 50 case 60 second lens 70 glue 90 Mounting surface 11 Substrate 41 side wall 43 containment cavity 45 Positioning department 411 through hole 415 joint surface 431 Glue overflow hole 433 first side wall 61 second side wall 63 positioning hole 611 Containment Hole 1 613 Second Containment Hole 631

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Referring to FIG. 1 and FIG. 2 , an optical fiber connection assembly 100 according to an embodiment of the present invention includes two photoelectric conversion modules 101 and a plurality of optical fibers 105 connecting the two photoelectric conversion modules 101 . The photoelectric conversion module 101 is used to realize conversion between optical signals and electrical signals. Optical fiber 105 is used to transmit optical signals. In this embodiment, the plurality of optical fibers 105 are the plurality of optical fibers 105 in one optical fiber transmission ribbon.

The photoelectric conversion module 101 includes a circuit board 10 , a light receiving element 20 , a light emitting element 30 , a cover 40 , a first lens 50 , a casing 60 and a second lens 70 . The light receiving element 20 , the light emitting element 30 and the cover 40 are all installed on the circuit board 10 . The cover 40 covers the light receiving element 20 and the light emitting element 30 . The first lens 50 is installed in the cover body 40 and optically coupled with the light receiving element 20 and the light emitting element 30 . The casing 60 is engaged with the cover 40 . The second lens 70 is installed in the casing 60 and aligned with the first lens 50 . Two ends of the optical fiber 105 are respectively inserted in a side of the casing 60 away from the cover 40 , and the optical fiber 105 is coupled with the second lens 70 .

The circuit board 10 includes a mounting surface 11 facing the cover 40 . Circuits are arranged on the mounting surface 11 for driving and controlling the light-emitting element 30 and the light-receiving element 20 to work. The light-receiving element 20 and the light-emitting element 30 are spaced apart from each other on the mounting surface 11 of the circuit board 10 , and are electrically connected to the circuit of the circuit board 10 . The light receiving element 20 is used for receiving light signals and converting the light signals into electrical signals. The light emitting element 30 is used for receiving electrical signals and converting the electrical signals into optical signals. In this embodiment, both the light receiving element 20 and the light emitting element 30 are soldered on the circuit board 10 through solder balls. The light receiving element 20 is a photodiode, and the light emitting element 30 is a laser diode. It can be understood that the light receiving element 20 and the light emitting element 30 can also be pasted on the mounting surface 11 of the circuit board 10 through silver glue curing.

The cover 40 is fixed on the mounting surface 11 of the circuit board 10 by glue 90 . In this embodiment, the glue is UV glue. The cover 40 includes a base plate 41 and four sidewalls 43 extending from a periphery of the base plate 41 toward the circuit board 10 . The substrate 41 and the side wall 43 jointly define a receiving cavity 45 for receiving the light receiving element 20 and the light emitting element 30 . A pair of positioning portions 411 protrude from the substrate 41 toward the housing 60 . The substrate 41 defines a plurality of through holes 415 on a surface facing the housing 60 . A glue overflow hole 433 is opened on the joint surface 431 of the side wall 43 facing the circuit board 10 . Preferably, the glue overflow hole 433 is opened at a corner of the joint surface 431 . In this embodiment, the positioning portions 411 are distributed at both ends of the substrate 41 . The number of through holes 415 is four, and the through holes 415 are distributed between a pair of positioning portions 411 . The through hole 415 is on a straight line with the positioning portion 411 . The glue overflow hole 433 is a through hole, and the number of the glue overflow hole 433 is six, which are distributed in the four corners of the cover body 40 and the middle positions of the two short sides. It can be understood that the number of positioning parts 411 may be one, three, four or more. The glue overflow hole 433 may be one or more, and the glue overflow hole 433 may be a blind hole. The shape of the substrate 41 can be other, such as triangle, trapezoid, pentagon, etc. Correspondingly, the number of side walls 43 is other, for example, the number of side walls 43 is three, four, five, and the joint surface 431 Corresponding to polygons, such as triangles, quadrilaterals, pentagons.

The first lens 50 is installed in the through hole 415 . In this embodiment, the first lens 50 is a convex lens, the number of which is four. It can be understood that the number of first lenses 50 may be two, three, five or more. Correspondingly, the number of through holes 415 is two, three, five or more.

The casing 60 is substantially cuboid, and includes a first sidewall 61 facing the cover 40 and a second sidewall 63 opposite to the first sidewall 61 . The casing 60 defines a pair of positioning holes 611 and a first receiving hole 613 on the first side wall 61 , and defines a second receiving hole 631 on the second side wall 63 . In this embodiment, the positioning holes 611 are located at both ends of the first side wall 61 , and the positioning holes 611 correspond to the positions of the positioning portions 411 . The number of the first receiving holes 613 is four, and the first receiving holes 613 are distributed between a pair of positioning holes 611 . The first receiving hole 613 is on a straight line with the positioning hole 611 . The number of the second receiving holes 631 is four, and the first receiving holes 613 communicate with the corresponding second receiving holes 631 . It can be understood that the number of positioning holes 611 may be one, three, four or more.

The second lens 70 is installed in the first receiving hole 613 . In this embodiment, the second lens 70 is a convex lens, the number of which is four. Both ends of the optical fiber 105 are respectively fixed in the second receiving holes 631 of the two photoelectric conversion modules 101 by glue, and the ends of the optical fibers 105 received in the second receiving holes 631 are aligned with the corresponding second lenses 70 . In this embodiment, the number of optical fibers 105 is four. It can be understood that the number of the second lenses 70 may be two, three, five or more. Correspondingly, the numbers of the first receiving holes 613 and the second receiving holes 631 are respectively two, three, five or more.

During assembly, the light receiving element 20 and the light emitting element 30 are installed on the mounting surface 11 of the circuit board 10, the first lens 50 is installed in the through hole 415 of the cover body 40, and the corner of the joint surface 431 of the cover body 40 After the glue is applied, it is bonded to the mounting surface 11 of the circuit board 10 . The second lens 70 is installed in the first receiving hole 613 of the housing 60 , and the positioning portion 411 is inserted into the positioning hole 611 , so that the housing 60 is installed on the cover 40 . The two ends of the optical fiber 105 are respectively glued into the second receiving holes 631 of the two photoelectric conversion modules 101 .

In use, when the light-emitting element 30 of the photoelectric conversion module 101 receives an electrical signal transmitted by the circuit board 10 , the light-emitting element 30 converts the electrical signal into an optical signal and emits it to the first lens 50 aligned therewith. The optical signal is transmitted to the optical fiber 105 through the first lens 50 and the second lens 70 . When the second lens 70 receives the optical signal transmitted by the optical fiber 105, the optical signal is transmitted to the light receiving element 20 through the second lens 70 and the first lens 50, and the light receiving element 20 receives the optical signal and converts the optical signal into an electrical signal, The electrical signal is then transmitted to the circuit board 10 .

It can be understood that the housing 60 can be omitted, the second lens 70 is directly installed on the cover 40, and the second lens 70 is aligned with the first lens 50, and the end of the optical fiber 105 is directly inserted into the on the cover body 40 and align the end of the optical fiber 105 with the second lens 70 .

In the photoelectric conversion module 101 provided by the present invention, the cover body 40 with the first lens 50 installed on the mounting surface 11 of the circuit board 10 is installed on the mounting surface 11 of the circuit board 10 through glue. When the volume of the glue expands during curing and baking at high temperature or when air is mixed into the glue material to generate air bubbles, the excess glue can expand and enter the glue overflow hole 433, so as to avoid the deviation of the cover body 40 due to the above reasons, thereby avoiding the light-emitting element 30. And the optical coupling efficiency between the light receiving element 20 and the first lens 50 is not good, so as to improve the optical signal transmission efficiency.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims (10)

1. a joint, the multifiber that it comprises two opto-electronic conversion modules and connects these two opto-electronic conversion modules, this opto-electronic conversion module comprises circuit board, be installed in photo detector and the light-emitting component of this circuit board, it is characterized in that: this opto-electronic conversion module also comprises by glue and is adhered to the lid of this circuit board and is installed in a plurality of first lens of this lid, this lid covers on this photo detector and this light-emitting component, the end alignment of the plurality of first lens and this multifiber, the plurality of first lens and this photo detector and light-emitting component optically-coupled, offer the glue hole of overflowing on the composition surface of this lid and circuit board, when this lid is bonding while being connected to this circuit board, unnecessary glue enters this excessive glue hole.

2. as claim 1 a described joint, it is characterized in that: this opto-electronic conversion module also comprises the housing engaged with this lid and is installed in a plurality of second lens of this housing, this first lens and this second lens alignment, the two ends of this optical fiber are inserted in respectively in the housing of these two opto-electronic conversion modules, the end alignment in a plurality of first lens of this opto-electronic conversion module and the insertion housing of this optical fiber.

3. as claim 1 a described joint, it is characterized in that: lid comprises substrate and a plurality of sidewalls that extended towards this circuit board by this substrate, and the composition surface of this lid is the face of the plurality of sidewall towards this circuit board.

4. as claim 3 a described joint, it is characterized in that: this composition surface is polygon, and this excessive glue hole is formed at the bight on this composition surface.

5. as claim 2 a described joint, it is characterized in that: this lid is formed with location division towards the sidewall of this housing, this housing comprises the first side wall towards this lid, and this first side wall offers pilot hole, and this location division is sticked in this pilot hole.

6. as claim 5 a described joint, it is characterized in that: the substrate of this lid offers a plurality of through holes on the side of this housing, and the plurality of first lens is contained in the plurality of through hole.

7. as claim 6 a described joint, it is characterized in that: this first side wall also offers a plurality of the first accepting holes, and the plurality of the second lens are contained in the plurality of the first accepting hole, and the plurality of the second lens are aimed at the plurality of first lens.

8. as claim 7 a described joint, it is characterized in that: this housing also comprises second sidewall relative with this first side wall, this second sidewall offers the second accepting hole, the plurality of the second accepting hole is communicated with the plurality of the first accepting hole, and the two ends of this optical fiber are inserted in respectively in second accepting hole of housing of this two opto-electronic conversion module.

9. an opto-electronic conversion module, comprise circuit board, be installed in photo detector and the light-emitting component of this circuit board, it is characterized in that: this opto-electronic conversion module also comprises by glue and is adhered to the lid of this circuit board and is installed in a plurality of first lens of this lid, this lid covers on this photo detector and this light-emitting component, the plurality of first lens and this photo detector and this light-emitting component optically-coupled, offer the glue hole of overflowing on the composition surface of this lid and circuit board, when this lid is bonding while being connected to this circuit board, unnecessary glue enters this excessive glue hole.

10. as claim 9 a described opto-electronic conversion module, it is characterized in that: this opto-electronic conversion module also comprises the housing engaged with this lid and is installed in a plurality of second lens of this housing, this first lens and this second lens alignment.

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