CN104375244A - Optical communication module - Google Patents

Abstract

An optical communication module, comprising a first optical fiber, a second optical fiber, a light emitting unit, a light receiving unit and a lens unit, the first optical fiber and the second optical fiber are located on opposite sides of the lens unit, the optical signal input by the first optical fiber passes through the lens The unit is then received by the light-receiving unit, and the light signal emitted by the light-emitting unit passes through the lens unit and then exits through the second optical fiber. The lens unit includes a first incident surface, a first exit surface, a first reflection surface, a second incident surface, and a second exit surface. surface and the second reflective surface, the first incident surface and the first exit surface perpendicularly intersect and have an angle of 45 degrees with the first reflective surface, the second incident surface and the second exit surface perpendicularly intersect and intersect with the second reflective surface There is an included angle of 45 degrees between them, the first reflective surface and the second reflective surface intersect perpendicularly, and the first incident surface and the second outgoing surface are located on the same surface.

Description

Optical communication module

technical field

The invention relates to an optical communication module.

Background technique

A traditional optical communication module includes an optical fiber (incoming optical fiber and an outgoing optical fiber), a light emitting unit, an optical coupling lens, and a light receiving unit. The optical coupling lens is used to couple optical signals between the optical fiber and the light reflecting unit or light receiving unit.

The optical coupling lens is generally provided with an incident lens and an exit lens on two adjacent surfaces, so that the optical signal is coupled between the optical fiber and the light reflection unit or light receiving unit, while the incident optical fiber and the outgoing optical fiber are located at the coupling same side of the lens.

Contents of the invention

In view of this, it is necessary to provide an optical communication module in which the first optical fiber and the second optical fiber are located on different sides of the lens unit.

An optical communication module, comprising a first optical fiber, a second optical fiber, a light emitting unit, a light receiving unit and a lens unit, the first optical fiber and the second optical fiber are located on opposite sides of the lens unit, the first optical fiber input The light signal of the light is received by the light receiving unit after passing through the lens unit, and the light signal emitted by the light emitting unit is emitted through the second optical fiber after passing through the lens unit, and the lens unit includes a first incident surface, a second An exit surface, a first reflective surface, a second incident surface, a second exit surface and a second reflective surface, the first incident surface and the first exit surface perpendicularly intersect and have a 45-degree distance from the first reflective surface The included angle, the second incident surface and the second outgoing surface perpendicularly intersect and have an included angle of 45 degrees with the second reflective surface, the first reflective surface and the second reflective surface perpendicularly intersect, and the first The incident surface and the second outgoing surface are located on the same surface, and the first outgoing surface and the first incident surface are parallel and respectively located on two sides of the first incident surface.

Compared with the prior art, the lens unit of the embodiment of the present invention has a first reflective surface and a second reflective surface that intersect vertically, which can reflect light to different directions, and can also reflect light from different directions to the same direction at the same time. Thus, the first optical fiber and the second optical fiber can be located on opposite sides of the lens unit.

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 view of FIG. 1 .

FIG. 3 is an exploded view from another angle of FIG. 1 .

Fig. 4 is a schematic cross-sectional view of line IV-IV in Fig. 1 .

Fig. 5 is a schematic cross-sectional view of line V-V in Fig. 1 .

Description of main component symbols

Optical communication module 10 lens unit 11 circuit board 12 processing unit 13 light unit 14 light receiving unit 15 second fiber 16 first fiber 17 first incident surface 111 first incident lens 1110 first exit surface 112 first exit lens 1120 first reflective surface 113 second plane of incidence 114 second incident lens 1140 Second exit surface 115 second exit lens 1150 second reflective surface 116

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

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3, the optical communication module 10 of the embodiment of the present invention includes a lens unit 11, a circuit board 12, a processing unit 13, a light emitting unit 14, a light receiving unit 15, a second optical fiber 16 and a first Fiber 17.

Wherein, the processing unit 13, the light emitting unit 14 and the light receiving unit 15 are electrically arranged on the circuit board 12 and the processing unit 13 is electrically connected to the light emitting unit 14 and the light receiving unit 15 to control the working state, the second optical fiber 16 and the first optical fiber 17 are located opposite sides of the lens unit 11.

The light emitted by the light emitting unit 14 passes through the lens unit 11 and enters the second optical fiber 16 for transmission, and the light transmitted by the first optical fiber 17 passes through the lens unit 11 and is received by the light receiving unit 15 .

The circuit board 12 can be a hard board or a soft board, the light emitting unit 14 can be a light emitting diode (LED) or a laser diode (LD), and the light receiving unit 15 is a photodetector (PD).

Please refer to FIG. 4 and FIG. 5 together. The lens unit 11 has a first incident surface 111 , a first exit surface 112 , a first reflection surface 113 , a second incident surface 114 , a second exit surface 115 and a second reflection surface 116 .

There is an included angle of 45 degrees between the first reflective surface 113 and the first incident surface 111 and the first incident surface 111, and there is a 45-degree included angle between the second reflective surface 116 and the second outgoing surface 115 and the second incident surface 114. Angle, the first incident surface 111 and the second exit surface 115 are located on the same plane, the first exit surface 112 and the second incident surface 114 are located on opposite sides of the first incident surface 111, the first reflective surface 113 and the second reflective surface The faces 116 intersect perpendicularly.

The first incident surface 111 has a first incident lens 1110, and the first exit surface 112 has a first exit lens 1120. The light emitted by the light emitting unit 14 is incident on the first reflective surface 113 of the lens unit 11 through the first incident lens 1110. After being reflected by the first reflective surface 113 , the light exits from the lens unit 11 through the first exit lens 1120 , and then is coupled into the second optical fiber 16 for transmission.

The number of the first incident lens 1110 and the first outgoing lens 1120 is not limited to one in this embodiment, and can be other numbers. Correspondingly, the number of the second optical fiber 16 and the light emitting unit 14 is not limited to one in this embodiment. .

There is a second incident lens 1140 on the second incident surface 114, and a second exit lens 1150 is provided on the second exit surface 115. The optical signal transmitted by the first optical fiber 17 is incident on the second reflecting surface 116 through the second incident lens 1140, and is received After reflection, the light exits from the lens unit 11 through the second exit lens 1150 , and is then received by the light receiving unit 15 .

Similarly, the number of the second incident lens 1140, the second exit lens 1150, the light receiving unit 15 and the number of the first optical fiber 17 is not limited to one in this embodiment.

The lens unit 11 has a first reflective surface 113 and a second reflective surface 116 perpendicularly intersecting, which can reflect light to different directions, and can also reflect light from different directions to the same direction, so that the first optical fiber 17 and the second optical fiber 16 are located on opposite sides of the lens unit 11 .

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 (7)

1. an optical communication module, comprise the first optical fiber, second optical fiber, luminescence unit, light receiving unit and lens unit, described first optical fiber and the second optical fiber are positioned at the relative both sides of described lens unit, the light signal of described first optical fiber input is received by described light receiving unit after described lens unit, the light signal that described luminescence unit sends after described lens unit through described second fiber exit, it is characterized in that, described lens unit comprises first plane of incidence, first exit facet, first reflecting surface, second plane of incidence, second exit facet and the second reflecting surface, described first plane of incidence and the first exit facet intersect vertically and and between described first reflecting surface, there are 45 degree of angles, described second plane of incidence and the second exit facet intersect vertically and and between described second reflecting surface, there are 45 degree of angles, described first reflecting surface and the second reflecting surface intersect vertically, described first plane of incidence and the second exit facet are positioned on same surface, described first exit facet is parallel with first plane of incidence and lay respectively at the both sides of described first plane of incidence.

2. optical communication module as claimed in claim 1, it is characterized in that, described optical communication module comprises circuit board further, and described luminescence unit and light receiving unit are electrically arranged on described circuit board.

3. optical communication module as claimed in claim 2, it is characterized in that, described luminescence unit is light emitting diode or laser diode, and described light receiving unit is photoelectric detector.

4. optical communication module as claimed in claim 2, it is characterized in that, described optical communication module comprises processing unit further, and described processing unit to be electrically arranged on described circuit board and to be electrically connected with described luminescence unit and light receiving unit.

5. optical communication module as claimed in claim 1, it is characterized in that, described first plane of incidence has the first entrance lens, described first exit facet has the first exit lens, the light that described luminescence unit sends incides on described first reflecting surface through described first entrance lens, is coupled into described second optical fiber after reflection through described first exit lens.

6. optical communication module as claimed in claim 5, it is characterized in that, described second plane of incidence has the second entrance lens, described second exit facet has the second exit lens, the light signal of described first Optical Fiber Transmission incides on described second reflecting surface through described second entrance lens, is coupled into described light receiving unit after reflection through described second exit lens.

7. optical communication module as claimed in claim 2, it is characterized in that, described circuit board is hardboard or soft board.