TWM448693U - Light guiding structure - Google Patents

Description

Light guiding structure

This creation relates to a light guiding structure that can improve the coupling efficiency.

In the optical fiber communication system, the optical sub-assembly module (Optical Sub-Assembly for Transceivers) is an important medium in the conversion of the optical signal and the electric signal. As shown in FIG. 1A, the optical transceiver module 10 includes a receiving body 11 The first end is connected to the light emitting unit 12, and the second end is connected to the light guiding structure. The light guiding structure can be divided into a Pigtail type and a Receptacle type. The pigtail type light guiding structure 13 has a receiving tube 14 having a capillary tube 15 at the front end thereof and a straight hole 18 therein; and a fiber transmission line 16 coaxially disposed. The storage tube 14 is connected by an adhesive or an adhesive. Generally, the optical alignment of the light-emitting unit 12 with the light guiding structure 13 requires a light coupler to couple the optical fiber 17 of the optical fiber transmission line 16 with the optical signal of the light-emitting unit 12 to transmit the optical signal.

As shown in Fig. 1B, in terms of geometric optics theory, the beam exit angle is calculated as nSIN(θ 1)=SIN(θ 1+θ 2), n: fiber refractive index, θ 1: fiber is polished at the end face of the headgear Angle, θ 2: the angle between the axis of the fiber and the direction of light exit.

The capillary 15 is disposed in the housing tube 14 in an upright manner by the formula and the theory that light is incident on the optical fiber and the light exits from the optical fiber (ie, the light incident angle and the light exit angle θ 2 ). Therefore, the optical signal of the light unit 12 is The direction of the radiation is in line with the optical fiber 17, and does not emit the same axial direction as the outgoing light of the optical fiber 17, thereby causing loss of the incident optical signal, and this deficiency needs to be remedied.

The main purpose of the present invention is to provide a light guiding structure that can improve the coupling efficiency without changing the incident direction of the light emitting unit.

The light guiding structure comprises a fiber transmission line, and a hood structure can be used for receiving the fiber transmission line; wherein the head cover structure has a receiving tube and a capillary tube, the receiving tube defines a central hole, and a first inclined hole leads to The central hole and a second inclined hole communicate with the first inclined hole and can receive the capillary. The fiber optic transmission line is inserted from the central hole and extends to the first inclined hole, and finally a portion of the optical fiber of the optical fiber transmission line is extended into the capillary. The optical fiber can be corrected by the two-stage tilting of the first tilting hole and the second tilting hole, so that the fiber exiting direction is not deviated from the central axis, and the outgoing direction of the optical fiber is in the same axial direction as the incident direction of the light emitting unit of the light emitting unit. In order to reduce the loss of the incident of the optical signal, the coupling efficiency can be improved.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are for reference and description only, and are not intended to limit the creation.

Referring to FIG. 2 to FIG. 5 , the present optical guiding structure 20 is described as an embodiment of a pigtail structure, which includes a fiber transmission line 21 and a casing structure 30 . The optical fiber transmission line 21 can be used to receive the optical fiber transmission line 21; the optical fiber transmission line 21 has an optical fiber 22, a coating layer 23 covering the outer portion of the optical fiber 22, and a buffer layer 24 covering the outside of the coating layer 23. In essence, before the fiber optic transmission line 21 is mounted on the sleeve structure 30, a portion of the coating layer 23 and the buffer layer 24 must be removed from the free end thereof to expose a portion of the optical fiber 22 to a predetermined length.

The sleeve structure 30 includes a receiving tube 31 and a capillary tube 40 mounted therein. The housing tube 31 has a straight tube portion 32 and a curved tube portion 33. The straight tube portion 32 defines a central bore 34. The elbow portion 33 defines a first inclined hole 35, and a second inclined hole 36 communicates with the first inclined hole 35 and can receive the capillary 40. One end of the first inclined hole 35 communicates with the central hole 34 to form a continuous curved hole. One end of the optical fiber transmission line 21 is inserted from the center hole 34 of the housing tube 31 and extends to the capillary 40, and the optical fiber transmission line 21 is coupled to the housing tube 31 by a material.

The inclination direction of the first inclined hole 35 is different from that of the second inclined hole 36. As shown in FIG. 4, the first inclined hole 35 is inclined to the left by θ 3 angle, and the second inclined hole 36 is inclined to the right by θ 4 angle. .

The capillary tube 40 is disposed at the front end of the receiving tube 31, and defines a capillary hole 41 for receiving the optical fiber 22 exposing the optical fiber transmission line to couple the illumination signal of the light emitting unit to the optical fiber 22. In essence, the optical fiber 22 can be corrected by the two-stage tilting of the first inclined hole 35 and the second inclined hole 36, and the direction in which the optical fiber 22 is emitted does not deviate from the central axis C; and the outgoing direction of the optical fiber 22 and the light emitting unit are The incident direction of the optical signal is the same as the axial direction to reduce the loss when the optical signal is incident, and the coupling efficiency can be improved.

As shown in FIG. 6, one end of the optical fiber transmission line 21 is inserted from the center hole 34 of the receiving tube 31, and the optical fiber 22 is tilted once through the first inclined hole 35, and finally the optical fiber 22 of the optical fiber transmission line 21 is inserted. In the capillary hole 41 of the capillary 40, the second inclined hole 36 received by the capillary 40 controls the optical fiber 22 to be tilted twice, because the optical fiber 22 has two segments of the first inclined hole and the second inclined hole. The inclination of the optical fiber 22 can be corrected so that the direction of the exit of the optical fiber 22 does not deviate from the central axis C; and the direction of the exit of the optical fiber 22 is the same as the direction of the light incident direction of the light-emitting unit 50, so as to satisfy the calculation formula of the beam exit angle, and the optical signal emitted by the light-emitting unit 50 is emitted. A large amount of energy can be coupled and coupled to the optical fiber 22, thereby reducing coupling loss and greatly improving the coupling efficiency.

The above description is only a description of a preferred embodiment of the present invention, and is not intended to limit the creation of the present invention. Any person skilled in the art may use the above-mentioned technical content to change or modify the other embodiments without departing from the spirit and scope of the present invention. The scope of the present invention is limited only by the scope of the following patent application.

20‧‧‧Light guiding structure

21‧‧‧Fiber transmission line

22‧‧‧ fiber

23‧‧‧covered layer

24‧‧‧buffer layer

30‧‧‧ casing structure

31‧‧‧ Containment tube

32‧‧‧ Straight pipe section

33‧‧‧Bend section

34‧‧‧ center hole

35‧‧‧First inclined hole

36‧‧‧Second inclined hole

40‧‧‧ Capillary

41‧‧‧Capillary

50‧‧‧Lighting unit

C‧‧‧ center axis

Figure 1A is a cross-sectional view of a conventional light guiding structure.

Figure 1B is a cross-sectional view of a conventional light guiding structure, and shows a schematic diagram of the optical path of the incident light signal and the outgoing light signal.

Figure 2 is a cross-sectional view of the light guiding structure of the present invention.

Figure 3 is an exploded perspective view of the light guiding structure of the present invention.

Figure 4 is a cross-sectional view of the storage tube of the creation.

Figure 5 is a cross-sectional view of the capillary tube of the creation.

Figure 6 is a cross-sectional view of the light guiding structure of the present invention, and shows a schematic diagram of the optical path of the incident light signal and the outgoing light signal.

20‧‧‧Light guiding structure

21‧‧‧Fiber transmission line

22‧‧‧ fiber

23‧‧‧covered layer

24‧‧‧buffer layer

30‧‧‧ casing structure

31‧‧‧ Containment tube

32‧‧‧ Straight pipe section

33‧‧‧Bend section

34‧‧‧ center hole

35‧‧‧First inclined hole

36‧‧‧Second inclined hole

40‧‧‧ Capillary

C‧‧‧ center axis

Claims (3)

A light guiding structure is coupled to an illumination unit for optically transmitting to transmit optical signals, comprising: an optical fiber transmission line having an optical fiber, a coating layer covering the outer portion of the optical fiber, and a coating on the coating a buffer layer outside the layer, and a part of the optical fiber is exposed at the end of the optical fiber transmission line; and a hood structure having a receiving tube and a capillary tube, the receiving tube defining a central hole, a first inclined hole leading to the central hole, and a a second inclined hole is communicated with the first inclined hole, and is located at a front end of the receiving tube, and can receive the capillary tube. The optical fiber transmission line is inserted from the central hole and extends to the first inclined hole, and the optical fiber transmission line is The receiving tube is firmly connected, and finally the exposed part of the optical fiber is extended into the capillary. Since the optical fiber is tilted by the two-stage inclination of the first inclined hole and the second inclined hole, the direction of the fiber exit can be corrected without deviation. The central axis; and the outgoing direction of the optical fiber is in the same axial direction as the light incident direction of the light emitting unit, thereby reducing the coupling loss, thereby greatly improving the coupling efficiency. The light guiding structure according to the first aspect of the invention, wherein the receiving tube has a continuous tube portion whose inner portion is the central hole, and a curved portion of the curved portion is the first inclined hole. And a second inclined hole. The light guiding structure of claim 1, wherein the first inclined hole has a different inclination direction than the second inclined hole.