Wavefront phase sensor based on self-adaptive optical fiber coupler array

Abstract

The invention discloses a wavefront phase sensor based on a self-adaptive optical fiber coupler array. The wavefront phase sensor comprises the self-adaptive optical fiber coupler array, a coupler integrated device, an energy transfer optical fiber, a photoelectric detector group, a control platform and a multi-channel high voltage amplifier. The self-adaptive optical fiber coupler array is mounted in the coupler integrated device and used for splitting an incident laser beam and focusing and coupling the split incident laser beams into built-in optical fibers of couplers. The energy transfer optical fiber is connected with the built-in optical fibers of the self-adaptive optical fiber couplers; after laser is transmitted to the photoelectric detector group, the optical signal of each self-adaptive optical fiber coupler is converted into an electric signal and transmitted to the control platform. The control platform generates driving control voltages according to the received electric signals by use of an optimizing control algorithm, and the driving control voltages are amplified by the high voltage amplifier before acting on the self-adaptive optical fiber coupler array; the control platform is capable of obtaining the wavefront slope of each subaperture by virtue of inversion by using the driving control voltage corresponding to energy maximization of each self-adaptive optical fiber coupler, and thus reconstructing the wavefront phase by use of a wavefront restoration algorithm.

Description

technical field [0001] The invention relates to a measuring device for the wavefront phase of an incident light beam, in particular to a wavefront phase sensor based on an adaptive fiber coupler array, which belongs to the technical field of optical engineering. It has important application prospects in the fields of laser atmospheric transmission, free space laser communication, and laser radar. Background technique [0002] Adaptive optics technology has been widely used in astronomical observation, laser atmospheric transmission, free space laser communication and other fields to alleviate the impact of atmospheric turbulence effects on beam quality and improve system performance. In an adaptive optics system, the characteristics of the wavefront phase sensor are one of the main links that determine the overall performance of the system. Among them, the Hartmann-Shack wavefront phase sensor, shear interference wavefront phase sensor, and curvature wavefront phase sensor ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiency that the existing array fiber laser beam synthesis device cannot directly measure the wavefront phase, and to overcome the many inconveniences that exist when the wavefront phase sensor of traditional adaptive optics is combined with the fiber laser array, A wavefront phase sensor based on an adaptive fiber coupler array is proposed

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