Opposite-emitting type optical fiber coupling auxiliary regulating device and coupling method

[0029] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited by this.

[0030] See first figure 2 , figure 2 It is a schematic diagram of the structure of the through-beam type optical fiber auxiliary adjusting device of the present invention. It can be seen from the figure that the structure of the through-beam type fiber coupling auxiliary adjusting device of the present invention is: the laser diode 011, the collimating lens 009, and the half-wave plate 008 are sequentially arranged on the same optical axis. , The diaphragm 007, the coupling lens 006 and the optical fiber connector 005 are arranged on a base 010, the light-emitting surface of the laser diode 011 is located at the front focal plane of the collimating lens 009, and the optical fiber connector 005 The center of the fiber end face is located at the focal point of the coupling lens 006.

[0031] The invention also provides an adapter 013, see image 3 , The adapter has four connection standards: FC-FC, FC-SMA, FC-ST, FC-LC4. The FC connection end of the adapter 013 is connected to an FC matching fiber 014. The incident end of the fiber is PC or APC. , The other end of the adapter 013 is for connecting the corresponding target optical fiber 004.

[0032] The method of coupling a spatial laser beam with an optical fiber by using the above-mentioned opposite-beam type optical fiber coupling auxiliary adjusting device includes the following steps:

[0033] ①Determine the standard and incident end face format of the target fiber 004 to be coupled, and select the corresponding adapter 013;

[0034] ②Turn on the power of the laser diode. The laser light emitted by the laser diode 011 is called the reference beam. The reference beam passes through the collimator lens 009, half-wave plate 008, diaphragm 007, and coupling lens 006 to reach the optical fiber connector. The center of the fiber end face of 005, the reference beam is output from the fiber connector 005;

[0035] ③ Insert the output end 004B of the target optical fiber 004 to be adjusted into the optical fiber connector 005, or insert the output end 004B of the target optical fiber 004 to be adjusted into the optical fiber connector 005 through the adapter 013, so The reference beam enters the target optical fiber 004 and is output from the input end 004A of the target optical fiber 004;

[0036] ④ Adjust the position and direction of the optical fiber connector 003 of the target optical fiber 004 or the position and direction of the spatial laser beam 002 so that the spatial laser beam 002 coincides with the reference beam output from the optical fiber connector 005;

[0037] ⑤ Unplug the output end of the target optical fiber 004 from the optical fiber connector 005 or from the connector 013, and then connect it to a laser power meter, and then carefully adjust the optical fiber coupler 003 The position and direction of or the position and direction of the spatial laser beam 002 maximize the output of the laser power meter, that is, the coupling adjustment of the target fiber 004 and the spatial laser beam 002 is completed.

[0038] Experiments show that the present invention has the characteristics of simple structure, convenient use and operation, and accurate and reliable coupling.