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Multi-chain lath laser coherence control common-aperture polarization synthesis method

A technology of coherent control and polarization synthesis, which is applied in the field of strong lasers, can solve the problems of composite beams without aperture filling and far-field energy dispersion, and achieve the effects of high stability, high power, and high beam quality

Active Publication Date: 2012-11-28
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, the current output beams of slab lasers have their deficiencies, which are mainly reflected in: (1) Due to the influence of thermal effects and other factors, the beam quality of a single slab laser needs to be further improved; (2) The composite beam does not perform aperture filling , the synthesized spot has a certain duty ratio in the near field, causing the far field energy to disperse to the side spot, so the beam quality of the synthesized beam needs to be further improved

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[0020] figure 1 Among them, 1 is the seed source, 2 is the pre-amplifier module, 3 is the beam splitter array, 4 is the phase modulator, 5 is the primary amplifier module, 6 is the isolator array, 7 is the slat amplifier module, 8 is the unit beam Purification module, 9 is a synthesis module, 10 is a combined light beam purification module, 11 is a combined light beam processing module, 12 is a photoelectric detection module, and 13 is a signal processing module.

[0021] figure 2 Among them, 1 is the seed source, 2 is the pre-amplification module, 3 is the beam splitter array, 4 is the phase modulator, 5 is the first-stage amplification module, 6 is the isolator array, 71 is the full mirror I, and 72 is the slat Amplifier array, 81 is the beam splitting module I, 82 is the detection and control module, 83 is the deformable mirror I, 91 is the total reflection mirror II, 92 is the half-wave plate, 93 is the polarization beam combiner, 101 is the beam splitting module II, 10...

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Abstract

The invention relates to a multi-chain lath laser coherence control common-aperture polarization synthesis method. The method is based on a master oscillator power amplifier (MOPA) structure, the wavefront of each path of amplified light beams is purified by a unit beam purification system, and a coherence control common-aperture polarization synthesis technology is utilized to solve the problem that coherence synthesis energy is dispersed to side spots in the prior art, thereby realizing laser output with high mean brightness and common aperture. The multi-chain lath laser coherence control common-aperture polarization synthesis method comprises a unit beam purification technology, a phase-locked technology and a common aperture polarization control technology. A synthesis path can be expanded to multiple paths.

Description

technical field [0001] The invention relates to the field of strong laser technology, in particular to a multi-chain slab laser coherent control common-aperture polarization synthesis method. Background technique [0002] With the rapid development of semiconductor laser technology and the substantial improvement in the performance of semiconductor laser devices, all-solid-state lasers have achieved remarkable development, and have derived rod lasers, slab lasers, thin-sheet lasers, fiber lasers, heat capacity lasers and other different structures. laser. Due to the limitations of factors such as stability, thermal effects, and the characteristics of the laser medium itself, it is difficult for a single all-solid-state laser to obtain a laser output of hundreds of kilowatts. The coherent combination of multiple medium-power lasers is an effective method to solve the above bottleneck. Theoretical analysis of researchers from Northrop Grumman Corporation in the United States...

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Application Information

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IPC IPC(8): H01S5/068H01S5/065H01S5/50
Inventor 刘泽金许晓军周朴马鹏飞马阎星王小林粟荣涛吕海斌司磊陈金宝
Owner NAT UNIV OF DEFENSE TECH
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