A Fiber Laser Array Beaming System Based on Adaptive Polarization and Phase Control

Abstract

The invention discloses a fiber laser array bundle system based on adaptive polarization and phase control, including a fiber seed source module: generating seed light and dividing the seed light into multiple sub-beams; a non-polarization-maintaining fiber amplification module: used to Power amplification of each sub-beam; active polarization and phase control module: take the surrounding light intensity of the composite beam collected by the photodetector as an input signal, and control the phase and polarization of the fiber amplifier array to ensure that the phase and polarization of each sub-beam are consistent ; Beam Combination and Photoelectric Detection Module: used to coherently combine and output the amplified sub-beams, and detect the surrounding light intensity of the combined beams. The invention not only has a large number of synthesizing channels and high power, but also does not need a polarization and phase correlation detection module, and the optical circuit has a compact structure, small volume and strong reliability, and can also realize all-electric high-speed scanning deflection.

Description

technical field [0001] The high-power fiber laser array coherent beam combining technology of the present invention specifically refers to a fiber laser array beam combining system based on adaptive polarization and phase control. Background technique [0002] In beam coherent combining, phase and polarization control technology is the key. Among them, the synthesis efficiency based on active control increases with the acceleration of the hardware circuit and software algorithm speed, and the number of synthesis and power expansion are relatively large. Therefore, the study of high-speed, parallel active phase control technology can realize high-efficiency and high-quality coherent combination of large array fiber lasers, thereby improving the laser output power level and beam quality, which will greatly promote the development and application of lasers. [0003] At present, fiber laser coherent combining systems are divided into polarization-maintaining fiber systems and n...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a fiber laser array bundle system based on adaptive polarization and phase control, which overcomes the need to build a polarization-maintaining fiber optical path with low synthesis power or non-polarization-maintaining fiber optical path in the existing optical fiber coherent bundle technology Complicated issues of double detectors, introduction of seed source reference light and 90° fiber hybrid, polarization and phase correlation detection circuit

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