Optical fiber coupling system and coupling method

Abstract

The invention discloses an optical fiber coupling system and a coupling method, relates to the technical field of optical fiber coupling, and solves the problems that the effective working range is small, the coupling alignment precision is low, and the interference of atmospheric turbulence is serious. The optical fiber coupling system comprises a light spot tracking fast steering mirror, a tracking mirror driver, a beam splitter, an imaging lens group, a light spot position detector, an image processor, a nutation coupling fast steering mirror, a coupling mirror driver, a coupling lens group, a coupling optical fiber, a light energy detector and a controller, wherein the light spot position detector is placed on a focal plane of the imaging lens group, the end face of an optical fiber head of the coupling optical fiber is placed on a focal plane of the coupling lens group, and the optical axis of the optical fiber head is coaxial with the optical axis of the coupling lens group. According to the invention, optical fiber coupling with large effective view field, strong anti-interference capability and high coupling efficiency is realized. The optical fiber coupling efficiency canstill be kept under the influence of atmospheric turbulence, the overall communication quality of a laser communication link is guaranteed, and the application range is wide.

Description

Technical field [0001] The invention relates to the technical field of optical fiber coupling, in particular to an optical fiber coupling system and a coupling method. Background technique [0002] Efficient and stable space light-single-mode fiber coupling technology is the prerequisite and guarantee for the realization of high-speed and long-distance laser communication technology, and it is also a key technology in space laser application systems such as lidar and optoelectronic countermeasures. Due to optical machining, assembly adjustment, vibration and other reasons, the coupled beam will have tilt, defocus or other aberrations, resulting in a significant drop in the coupling efficiency of the spatial light-single-mode fiber. [0003] When the fiber coupling technology is applied in the atmospheric environment, the turbulence effect of the atmosphere causes serious interference to the laser beam when the laser beam propagates in the atmosphere, which makes the beam arrival an...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems that the existing optical fiber coupling system has a small effective working range, low coupling alignment accuracy, and serious interference by atmospheric turbulence, the present invention provides an optical fiber coupling system and a coupling method

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