CN103941347A - Optical communication module - Google Patents

Abstract

The invention discloses an optical communication module which comprises an optical fiber fixing unit and a lens unit. The optical fiber fixing unit is used for fixing an optical fiber. The lens unit is provided with a lens coupled with the optical fiber. The optical fiber fixing unit comprises a base body and a cover body. A groove which is used for accommodating the optical fiber is arranged on the base body. The cover body covers the base body and abuts against the optical fiber, so that the optical fiber is fixed in the groove.

Description

Optical communication module

technical field

The invention relates to an optical communication module.

Background technique

The optical communication module generally includes a plug-fit optical fiber fixing unit and a lens unit. The fiber fixing unit has a through hole for accommodating the optical fiber, and the lens unit has a lens coupled with the optical fiber. In addition, the fiber fixing unit also has a positioning hole, and the lens unit has a positioning column, and the positioning hole and the positioning column cooperate to align the lens and the optical fiber to achieve optical coupling.

According to the number of optical fibers, the fiber fixing unit needs a corresponding number of through holes, and then needs a corresponding number of mold cores to form the through holes. As the number of optical fibers continues to increase, the distance between adjacent optical fibers becomes smaller and smaller, making The distance between the inserts of the mold cores is correspondingly reduced, so it is difficult to achieve through-holes with uniform quality in the injection molding optical fiber fixing unit, thereby affecting the light transmission efficiency of the optical communication module.

Contents of the invention

In view of this, it is necessary to provide an optical communication module that can fix optical fibers without through holes.

An optical communication module, comprising an optical fiber fixing unit and a lens unit, the optical fiber fixing unit is used to fix the optical fiber, the lens unit has a lens coupled with the optical fiber, the optical fiber fixing unit includes a base body and a cover body, the There is a groove on the base body for accommodating the optical fiber, and the cover covers the base body and presses against the optical fiber so that the optical fiber is fixed in the groove.

Compared with the prior art, the optical fiber fixing unit of the optical communication module of this embodiment uses the cooperation of the cover and the base to fix the optical fiber, and can realize the function of fixing the optical fiber without forming a through hole for fixing the optical fiber.

Description of drawings

FIG. 1 is a schematic diagram of an optical communication module according to an embodiment of the present invention.

FIG. 2 is an exploded schematic diagram of an optical communication module according to an embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of FIG. 1 .

Description of main component symbols

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

Detailed ways

Please refer to FIG. 1, FIG. 2 and FIG. 3. The optical communication module 100 provided by the embodiment of the present invention includes an optical fiber fixing unit 10 and a lens unit 20. The optical fiber fixing unit 10 is used to fix the optical fiber 30 to realize the connection between the optical fiber 30 and the lens unit 20. Optical coupling between.

The optical fiber fixing unit 10 is roughly square and includes a base body 11 and a cover body 12 . The middle part of the seat body 11 has a groove 110, two positioning holes 111 and four fixing holes 112, the optical fiber 30 is arranged in the groove 110, the positioning holes 111 are located on the surface of the fiber fixing unit 10 facing the lens unit 20 and the positioning holes 111 The center of the line passes through the center of the optical fiber 30, and the groove 110 is located between the positioning holes 111. The fixing holes 112 are located on the surface of the seat body 11 having the groove 110 and are evenly distributed on both sides of the groove 110 .

The positioning hole 111 may be a blind hole or a through hole. In this embodiment, the positioning hole 111 is a circular through hole.

In other embodiments, the number of fixing holes 112 may also be an even number such as 2, 6 or 8.

The middle part of the cover body 12 protrudes to form a protruding part 120 , and the two sides of the protruding part 120 correspond to the fixing holes 112 with fixing posts 121 , and the height and width of the protruding part 120 are slightly smaller than the depth and width of the groove 110 respectively. When the fixing post 121 is inserted into the fixing hole 112 , the protrusion 120 just extends into the groove 110 and abuts against the optical fiber 30 in the groove 110 so that the optical fiber 30 is fixed in the groove 110 .

When the number of fixing holes 112 changes, the number of fixing posts 121 changes accordingly.

The lens unit 20 has a first lens 21 , a second lens 22 , a positioning column 23 and a reflective surface 24 , and the first lens 21 is in one-to-one correspondence with the optical fiber 30 to achieve optical coupling with the optical fiber 30 . The positioning column 23 is located on the surface of the lens unit 20 with the first lens 21, the first lens 21 is located in the area between the positioning columns 23, and the line between the centers of the two positioning columns 23 passes through the optical axis of the first lens 21, the positioning column 23 is used to cooperate with the positioning hole 111 to position the optical fiber fixing unit 10 and the lens unit 20 so as to ensure that the optical axis of the first lens 21 coincides with the center line of the optical fiber 30 . The number of the second lenses 22 is the same as the number of the first lenses 21 and corresponds one to one.

The reflective surface 24 is concavely arranged on the lens unit 20 and has an angle of 45 degrees between the optical axis of the first lens 21 and the optical axis of the second lens 22. In addition, the optical axis of the first lens 21 and the corresponding first lens 21 The optical axes of the two lenses 22 perpendicularly intersect on the reflective surface 24 . The optical signal emitted from the optical fiber 30 is incident on the reflective surface 24 through the first lens 21, is reflected by the reflective surface 24, and is received by other units (for example, a photodetector) in the optical communication module 100 through the second lens 22; According to the principle of reversibility of the optical path, the light emitted from the second lens 22 is incident on the reflective surface 24 , and enters the first lens 21 after being reflected by the reflective surface 24 .

The optical fiber fixing unit 10 of the optical communication module 100 of this embodiment uses the cooperation of the cover body 12 and the base body 11 to fix the optical fiber 30 , and can realize the function of fixing the optical fiber 30 without forming a through hole for fixing the optical fiber 30 .

It can be understood that those skilled in the art can also make other changes within the spirit of the present invention to be used in the design of the present invention, as long as they do not deviate from the technical effects of the present invention. These changes made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims (6)

1. an optical communication module, comprise optical fiber fixed cell and lens unit, described optical fiber fixed cell is used for fixing optical fiber, described lens unit has the first lens being coupled with optical fiber, it is characterized in that, described optical fiber fixed cell comprises pedestal and lid, has groove and be used for holding described optical fiber on described pedestal, and described cover cap is combined on described pedestal and supports described optical fiber so that described optical fiber is fixed in described groove.

2. optical communication module as claimed in claim 1, is characterized in that, the both sides of described groove have respectively a fixed orifice, and on described lid, corresponding described fixed orifice has fixed leg, and described lid is fixed on described pedestal by described fixed leg and fixed orifice.

3. optical communication module as claimed in claim 1, is characterized in that, on described pedestal, has pilot hole, on described lens unit, has reference column, and described reference column and pilot hole match and make described lens unit and optical fiber fixed cell location.

4. optical communication module as claimed in claim 1, is characterized in that, on described lens unit, has reflecting surface, has the angle of 45 degree between described reflecting surface and the optical axis of described first lens.

5. optical communication module as claimed in claim 4, is characterized in that, further has the second lens on described lens unit, and the optical axis of described the second lens and the optical axis of described first lens are vertically intersected on described reflecting surface.

6. optical communication module as claimed in claim 1, is characterized in that, described pilot hole is through hole or blind hole.