大功率TEA CO<sub>2</sub>非稳腔激光器的远场传输特性

王晓铭; 郭劲; 郭汝海; 王挺峰

doi:10.3788/CO.20120506.0671

Volume 5 Issue 6

Dec. 2012

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Chinese Optics > 2012 > 5(6): 671-676.

WANG Xiao-ming, GUO Jin, GUO Ru-hai, WANG Ting-feng. Far-field transmittance characteristics of high-power unstable resonator TEA CO2 laser[J]. Chinese Optics, 2012, 5(6): 671-676. doi: 10.3788/CO.20120506.0671

Citation:

WANG Xiao-ming, GUO Jin, GUO Ru-hai, WANG Ting-feng. Far-field transmittance characteristics of high-power unstable resonator TEA CO₂ laser[J]. Chinese Optics, 2012, 5(6): 671-676. doi: 10.3788/CO.20120506.0671

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Far-field transmittance characteristics of high-power unstable resonator TEA CO₂ laser

doi: 10.3788/CO.20120506.0671

1.
Aerospace Commissary of Navy in Shanghai,Shanghai 201109,China;
2.
State Key Laboratory of Laser Interaction with Matter,Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Received Date: 08 Oct 2012
Rev Recd Date: 23 Nov 2012
Publish Date: 10 Dec 2012

Abstract

Abstract

A new method combining relative measurement and absolute measurement is proposed to measure the transmittance characteristics of far-field beam quality of TEA CO2 lasers, and the intensity distribution for a 2 kW pulsed TEA CO2 laser in the distance of 500 m is obtained. The measurement results are discussed and analyzed. The experimental results show that the measurement is convenient and precise, and the influence of atmospheric turbulence is also taken into consideration. Flat top, fragmentation and furthermore side lobe appear in the intensity distribution. Measured by this method, the transmission rate of atmosphere is 81.5%, the maximum intensity is 1.59 W/cm2 and the divergence angle of cross direction is up to 0.64 mrad, which agree with the theoretical results. It is a very important reference for evaluating the effectiveness and optimization design of laser systems.
- unstable resonator laser,
- beam transmittance characteristic,
- divergence angle,
- power density distribution

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References

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