Axial-adjustment-free adjustable optical fiber coupler with tail fiber

Abstract

The invention discloses an axial-adjustment-free adjustable optical fiber coupler with a tail fiber. The axial-adjustment-free adjustable optical fiber coupler comprises an optical fiber collimator, a collimator adjusting frame and an optical fiber output head. Free space collimation laser to be coupled enters the optical fiber collimator, the optical fiber collimator is fixed in a clamp of the collimator adjusting frame, and the output end of a tail fiber is connected with an optical fiber output head. A lens and a tail fiber of the optical fiber collimator are axially decoupled and adjustable, and the lens and the tail fiber are sequentially adjusted to ideal postures by using a wave aberration interferometer, so that the optical fiber collimator has an optimal collimation effect and minimum wavefront distortion; a lens and a tail fiber of the optical fiber collimator are packaged into a whole after being adjusted, so that axial-adjustment-free high-efficiency optical fiber coupling of free space collimation laser is realized; rotation dimension decoupling of the collimator adjusting frame is adjustable, and polarization-maintaining optical fiber coupling of linearly polarized light is achieved on the premise that coupling efficiency is not lost in cooperation with a polarization-maintaining coupling optical path.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to an adjustable optical fiber coupler with pigtail fiber and free of axial adjustment, which is especially suitable for high-efficiency coupling of various free space collimated lasers and single-mode polarization-maintaining / non-polarization-maintaining fibers . Background technique [0002] Since the 1970s, laser technology has developed rapidly and has been widely used in industry, medical, commercial, scientific research, information and military fields. In some applications, the free-space laser directly emitted by the laser as a light source will bring inconvenience to the use of the overall system, so fiber coupling is particularly important. After the laser is coupled, it is output from the optical fiber connector, which can be better connected with the subsequent application system, effectively reducing the stray light entering the system, and increasing the co...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide an adjustable optical fiber coupler with pigtails and without axial adjustment, which realizes the free-space collimated laser fiber coupling without axial adjustment, and solves the problem of the axial dimension and other dimensions of the existing optical fiber coupler The problem of mutual coupling, while solving the problem of high-efficiency axial adjustment-free polarization-maintaining coupling output

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