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Laser Array Piston Phase Control Method

A technology of phase control and laser array, applied in the direction of lasers, laser devices, laser components, etc., can solve the problems of limited modulation signal frequency and increased difficulty in making control circuits for analog circuits, so as to reduce the difficulty of development and increase the number of synthesis circuits Number, Guarantee the effect of controlling the bandwidth

Active Publication Date: 2021-12-03
NAT UNIV OF DEFENSE TECH
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AI Technical Summary

Problems solved by technology

With the increase in the number of laser channels used for coherent synthesis, the frequency of high-frequency sinusoidal signals used for modulation increases, and it is more difficult to use analog circuits to produce control circuits. If digital circuits are used to generate sinusoidal modulation signals, the number of sampling points and the digital circuit system clock limitation, the frequency of the modulating signal that can be used is limited

Method used

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  • Laser Array Piston Phase Control Method
  • Laser Array Piston Phase Control Method
  • Laser Array Piston Phase Control Method

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Embodiment Construction

[0029] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] This embodiment provides a laser array piston phase control method. In the laser array piston phase control system, the phase controller controls the control voltage of the phase modulator in the transmission path of each sub-laser in the laser array to regulate the piston phase of each sub-laser. , the control voltage of the phase modulator in each sub-laser transmission path is the sum of the phase control bias voltage of the phase modulator in each sub-laser transmission path and the modulation signal corresponding to each sub-laser, and the modulation signals of each sub-laser are different freq...

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Abstract

The invention provides a laser array piston phase control method, including a laser array piston phase control system, and the laser array piston phase control system includes a seed source laser, a beam splitter, a phase modulator, a fiber laser amplification system, a beam combining collimator, Sampling mirror, focusing lens, photodetector and phase controller. In the laser array piston phase control system, the control voltage of the phase modulator in the transmission path of each sub-laser in the laser array is controlled by the phase controller to regulate the output of each sub-laser. Piston phase. The invention can realize the phase control of more laser arrays on the basis of reducing the difficulty of hardware development.

Description

technical field [0001] The invention belongs to the field of fiber laser technology, and in particular relates to a laser array piston phase control method. Background technique [0002] High-power fiber laser has strong application requirements in the fields of material welding and cutting. Coherent beam combining of multiple laser beams is one of the effective means to obtain high-power lasers. In this scheme, the main oscillator power amplifier structure is generally adopted, and the seed laser is split into several beams of sub-lasers, and each laser beam is amplified separately and then combined by a beam combining device. One of the key technologies to achieve coherent combination is to control the piston phase of each laser, so that the phase difference between each laser is as small as possible, so as to obtain a stable and efficient far-field combination effect. Apply small-amplitude high-frequency sinusoidal modulation with different frequencies to each laser, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/23
CPCH01S3/067H01S3/10053H01S3/23
Inventor 周朴常洪祥马鹏飞粟荣涛马阎星吴坚李灿刘伟姜曼常琦侯天悦张雨秋王涛张嵩司磊许晓军陈金宝
Owner NAT UNIV OF DEFENSE TECH
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