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

Abstract

The invention relates to an opposite-emitting type optical fiber coupling auxiliary regulating device and a coupling method, which are used for coupling space laser beams to optical fibers. The device has a structure that a laser diode, a collimation lens, a half-wave plate, a diaphragm, a coupling lens and an optical fiber connector are coaxially and sequentially arranged on one base, the light-emitting surface of the laser diode is positioned on the front focal surface of the collimation lens, and the center of the optical fiber end surface of the optical connector is positioned in the focus of the coupling lens. The invention has the characteristics of simple structure, convenient use and operation and accurate and reliable coupling.

Description

technical field [0001] The present invention relates to an optical fiber, in particular to an auxiliary adjusting device and a coupling method for through-beam optical fiber coupling, in particular to an auxiliary adjusting device and a coupling method for coupling a laser from space to an optical fiber. Background technique [0002] Optical fibers have very important applications in scientific research and high-tech fields. In many occasions, it is necessary to couple laser light from free space into single-mode optical fibers. Single-mode optical fibers have the characteristics of thin core diameter (a few microns) and small numerical aperture (about 0.1). It is more difficult to determine the coupling of the light beam from the space propagation to the fiber propagation. [0003] Coupling the laser from space to the optical fiber is currently mostly used to adjust the multimode fiber first, and then remove the multimode fiber after obtaining the maximum coupling, and repl...

AI Technical Summary

Problems solved by technology

This patent proposes an effective method for adjusting the optical fiber, but it is still subject to some restrictions in use. Since the patent uses the reflection imaging method at the incident end, a large number of optical elements ( figure 1 Units 1-7 in the middle) are inserted into the front end of the fiber coupling head, especially 3 is an imaging device, which is relatively large and cannot be applied to a relatively compact optical path; secondly, the adjustment of this scheme is still difficult, especially the matching of the optical fiber and the laser beam When it is bad, it is more difficult to adjust

Images