CN102621641A - Optical fiber connector - Google Patents

Abstract

Disclosed is an optical fiber connector, comprising a supporting body and a body, wherein the supporting body is equipped with a photo diode and a light-emitting diode. The body includes a first lensed fiber, a second lensed fiber, and a reflective surface, wherein the central axis of the first lensed fiber is parallel to the central axis of the second lensed fiber. Optical signals transmitted by the first lensed fiber are received by the photo diode after a total reflection of the reflective surface. The photo diode is used for converting the optical signals transmitted by the first lensed fiber into electric signals. Optical signals representing the electric signals emitted by the light-emitting diode are incident to the reflective surface and totally reflected by the reflective surface, and then the totally reflected optical signals are coupled to the second lensed fiber and transmitted. The angle between the reflective surface and the axis of the first lensed fiber is 45 degree.

Description

The optical fiber connector

technical field

The invention relates to an optical fiber connector.

Background technique

In the fiber optic connector (Light Peak) that is being advocated now, the mechanical parts are manufactured by injection molding. There are blind holes on the mechanical parts to accommodate the optical fibers. The end of the blind holes has a lens integrally formed with the mechanical parts. , the light emitted by the light source travels a certain distance in the air and then incident on the lens, the light emitted from the lens is transmitted in the mechanical components and then enters the optical fiber for transmission. Therefore, the optical fiber connector needs to assemble the optical fiber into the blind hole and make the lens and The optical fiber has sufficient rightness. In addition, due to the transmission of light in different media, the optical loss is relatively large.

Contents of the invention

In view of this, it is necessary to provide an optical fiber connector with high alignment and low optical loss.

An optical fiber connector, which includes: a carrier, which is provided with a photodiode and a light emitting diode; and a body, which has a first lens fiber, a second lens fiber and a reflection surface, the first lens fiber and the second lens fiber The central axis of the first lens fiber is parallel to the second lens fiber. The optical signal transmitted by the first lens fiber is reflected by the reflective surface and then received by the photodiode. The photodiode is used to convert the first lens fiber The transmitted optical signal is converted into an electrical signal, and the light emitting diode emits an optical signal representing an electrical signal incident on the reflective surface and is reflected by the reflective surface and then coupled to the second lens optical fiber for transmission. The reflective surface and The included angle between the central axis of the first lens fiber is 45 degrees.

An optical fiber connector, which includes: a carrier, which is provided with a photodiode and a light-emitting diode; and a body, which has a first lens fiber, a second lens fiber and a groove, and a reflection unit is provided in the groove, and the The reflection unit includes a first surface and a second surface, the first surface is perpendicular to the central axis of the first lens fiber, the angle between the second surface and the first surface is 45 degrees, the first lens fiber and The central axis of the second lens fiber is parallel, the light signal transmitted by the first lens fiber of the first lens fiber and the second lens fiber enters the reflection unit through the first surface, and the light signal is totally reflected on the second surface Received by the photodiode, the photodiode is used to convert the optical signal transmitted by the first lens fiber into an electrical signal, and the light signal emitted by the light emitting diode is incident on the reflection unit and is received by the After the second surface is totally reflected, it is coupled to the second lens optical fiber for transmission.

Compared with the prior art, the optical fiber connector of this embodiment designs the optical fiber and the lens into an integrated structure, thereby reducing the need for correcting the correct position of the optical fiber and the lens during the assembly process of the optical fiber connector, and reducing the distance between the light emitted by the light source and the optical fiber transmitted by the lens. After the light is reflected by the reflective surface, it directly enters the optical fiber for transmission and is received by the photodiode, which reduces the optical transmission interface and makes the optical loss smaller.

Description of drawings

FIG. 1 is a schematic diagram of an optical fiber connector according to a first embodiment of the present invention.

Fig. 2 is an exploded view of the optical fiber connector according to the second embodiment of the present invention.

Fig. 3 is an exploded view from another angle of the optical fiber connector according to the second embodiment of the present invention.

Fig. 4 is a sectional view taken along line IV-IV in Fig. 1 .

FIG. 5 is an enlarged view of V in FIG. 4 .

Fig. 6 is a schematic cross-sectional view of an optical fiber connector according to a second embodiment of the present invention.

The main components conform to the description

Fiber optic connector 10, 20

Carrier 11, 21

LED 111

Photodiode 112, 212

First Positioning Structure 116

Second positioning structure 117

Ontology 12, 22

Subject 120

First lens fiber 121, 221

Lens 1210

Second lens fiber 122

The first through hole 123

Second through hole 124

Reflective surface 125

The third positioning structure 126

The fourth positioning structure 127

Groove 220

First side 222

Second side 223

Reflection unit 224

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 together. The optical fiber connector 10 provided by the first embodiment of the present invention includes a carrier body 11 and a body 12 . The body 12 is disposed on the carrier body 11 .

The carrier 11 can be a circuit board (PCB), on which a light-emitting diode (light-emitting diode, LED) 111, a photodiode (photo diode, PD) 112, a first positioning structure 116 and a second positioning structure 117 are arranged.

The first positioning structure 116 and the second positioning structure 117 may be positioning holes or positioning columns. In this embodiment, the first positioning structure 116 and the second positioning structure 117 are both positioning holes.

The photodiode 112 is a PN photodiode, a PIN photodiode or an avalanche photodiode.

The main body 12 is roughly a square structure, on which a first lens fiber 121 , a second lens fiber 122 , a reflective surface 125 , a third positioning structure 126 and a fourth positioning structure 127 are disposed. The body 12 has a first through hole 123 and a second through hole 124 for accommodating and fixing the first lens fiber 121 and the second lens fiber 122 respectively.

The first lens fiber 121 has the same structure as the second lens fiber 122 , the end of the first lens fiber 121 has a lens 1210 , and the end of the second lens fiber 122 also has a lens 1210 .

Lens optical fiber is a variety of optical lenses with different performances that are directly produced on the end face (one or both ends) of the optical fiber by using precision processing technology. The lens 1210 can be a hemispherical lens, a conical lens, a Fresnel lens, a microsphere or a tapered hemispherical lens.

Cooperate with the first positioning structure 116 and the second positioning structure 117, the third positioning structure 126 and the fourth positioning structure 127 are positioning posts or positioning holes, in this embodiment the third positioning structure 126 and the fourth positioning structure 127 are both positioning post.

The reflection surface 125 is located at the end of the first through hole 123 and the second through hole 124 , and the included angle between it and the central axis of the first through hole 123 and the second through hole 124 is 45 degrees.

The first lens fiber 121 and the second lens fiber 122 are used to transmit light signals, wherein the first lens fiber 121 is used to output light signals, and the second lens fiber 122 is used to input light signals.

It can be understood that the fiber optic connector 10 may include more lens fibers according to actual needs, and is not limited to the two lens fibers in this embodiment.

The third positioning structure 126 extends into the first positioning structure 116, and the fourth positioning structure 127 extends into the second positioning structure 117 so that the body 12 is positioned on the carrier 11, so that the light emitted by the light emitting diode 111 is reflected by the reflective surface 125 The optical signal that is incident on the first lens fiber 121 and output, and that is input by the second lens fiber 122 is reflected by the reflective surface 125 and then received by the photodiode 112 and converted into an electrical signal.

Specifically, the light signal representing the electrical signal emitted by the light-emitting diode 111 is incident on the reflective surface 125, and the light signal is reflected by the reflective surface 125 and then incident on the first lens lens 1210, and then directly enters the optical fiber 121 for transmission after being emitted from the lens 1210; The optical signal enters the optical fiber connector 10 through the second lens optical fiber 122, and then enters the reflective surface 125 through the lens 1210. The light is reflected by the reflective surface 125 and is received by the photodiode 112. The optical signals of different energies make the photodiode 112 Different currents can be output.

Preferably, a reflective film is provided on the reflective surface 125 to increase the reflected optical signal, thereby reducing the loss of the optical signal.

The first lens optical fiber 121 and the second lens optical fiber 122 of the optical fiber connector 10 design the optical fiber and the lens into an integrated structure, thereby reducing the need for correcting the correct position of the optical fiber and the lens during the assembly process of the optical fiber connector 10, and the light emitted by the light source is reflected After the surface reflection, the optical signal directly enters the optical fiber transmission and the lens optical fiber transmission is reflected by the reflective surface and is directly received by the photodiode to convert the electrical signal, reducing the optical transmission interface and making the optical loss smaller.

Please refer to FIG. 6 , the optical fiber connector 20 provided by the second embodiment of the present invention also includes a carrier body 21 and a body 22 , and the body 22 has two lens fibers (a first lens fiber 221 is shown in the figure).

The carrier 21 has the same structure as the carrier 11 , that is, the photodiode 212 and light emitting diode (not shown) are also arranged on the carrier 21 .

The first lens fiber 221 is arranged on the body 22, and the body 22 has a groove 220 at the lens end of the lens fiber 221, and a reflection unit 224 is arranged in the groove 220, and the reflection unit 224 includes a first surface 222 and a second The angle between the surface 223 , the second surface 223 and the first surface 222 is 45 degrees. Wherein, the first surface 222 is perpendicular to the central axis of the first lens fiber 221 , and there is an air medium between the first surface 222 and the first lens fiber 221 , and there is also an air medium between the second surface 223 and the body 22 .

The optical signal L transmitted by the first lens fiber 221 enters the reflection unit 224 through the first surface 222, and then enters the second surface 223, and the optical signal L is fully emitted on the second surface 223 by the photodiode arranged on the carrier 21 212 received.

The signal is reversible according to the optical path, and the light signal representing the electrical signal emitted by the light emitting diode is reflected by the second surface 223 and then enters the lens optical fiber for transmission.

It can be understood that those skilled in the art can also make other changes within the spirit of the present invention for 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 (10)

1. joints of optical fibre, it comprises:

Supporting body, it is provided with photodiode and light emitting diode; And

Body; It has first lens fiber, second lens fiber and reflecting surface; The central axes of said first lens fiber and second lens fiber; The light signal of said first lens fiber transmission of first lens fiber, second lens fiber is received by said photodiode after said reflecting surface reflection; Said photodiode is used for converting the light signal of said first lens fiber transmission into electric signal, and said light emitting diode sends the light signal of represent electric signal and is incident to said reflecting surface and is coupled to said second lens fiber after the said reflecting surface reflection and transmit, and the angle of the central shaft of said reflecting surface and said first lens fiber is 45 to spend.

2. the joints of optical fibre as claimed in claim 1 is characterized in that, said first lens fiber is identical with the structure of second lens fiber.

3. the joints of optical fibre as claimed in claim 2 is characterized in that, the lens of said first lens fiber are the semicircle lens of semicircle lens, conical lens, Fresnel Lenses, microspheroidal lens or gradual shrinkage.

4. the joints of optical fibre as claimed in claim 1 is characterized in that, have through hole on the said body and are used for holding said first lens fiber and second lens fiber.

5. the joints of optical fibre as claimed in claim 1; It is characterized in that; Has first location structure on the said supporting body; Has second location structure that matches with said first location structure on the said body, by said first location structure and said body of second location structure and said supporting body location.

6. the joints of optical fibre as claimed in claim 5 is characterized in that, said first location structure is a pilot hole, and said second location structure is a reference column.

7. the joints of optical fibre as claimed in claim 5 is characterized in that, said first location structure is a reference column, and said second location structure is a pilot hole.

8. like the arbitrary described joints of optical fibre of claim 1 to 7, it is characterized in that said photodiode is PN photodiode, PIN photodiode or avalanche photodide.

9. joints of optical fibre, it comprises:

Supporting body, it is provided with photodiode and light emitting diode; And

Body; It has first lens fiber, second lens fiber and groove; Has reflector element in the said groove; Said reflector element comprises first and second; The central shaft of said first vertical said first lens fiber, said second angle with first are 45 degree, the central axes of said first lens fiber and second lens fiber; The light signal of said first lens fiber transmission of first lens fiber, second lens fiber gets into said reflector element through said first; Light signal is received by said photodiode after said second total reflection, and said photodiode is used for converting the light signal of said first lens fiber transmission into electric signal, and said light emitting diode sends the light signal of representing electric signal and is incident to said reflector element and is coupled to said second lens fiber after said second total reflection and transmit.

10. the joints of optical fibre as claimed in claim 9 is characterized in that, have through hole on the said body and are used for holding said first lens fiber and second lens fiber.

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