激光技术, 2007, 31 (1): 0106, 网络出版: 2010-06-03
FFT模拟腔镜畸变情况下高能CO2激光器输出模场
Output mode simulation for high-engergy CO2 laser with mirror deformation by means of FFT
激光光学 非均匀增益 热变形 快速傅里叶变换 模场分布 laser optics inhomogenous gain thermal deformation fast Fourier transform mode field distribution
摘要
为了研究横流气体激光器因谐振腔腔镜倾斜、中心热变形以及增益介质的横向流动而产生的非均匀增益对激光模场分布的影响，采用快速傅里叶变换算法模拟了高能CO2激光器的输出模场。结果表明，这些因素都会导致模场分布畸变。通过腔镜冷却、改善腔镜材料、增大反射率以及适当调节腔镜倾斜方向可改善非均匀增益对模场的影响。
Abstract
The fast Fourier transform method is used to study the mode field distribution for high-energy CO2 laser induced by the resonator mirror tilt,centre thermal distortion at the mirror and inhomogeneous gain resulting from transverse flow of gain medium. The simulation results indicate that all the above factors influence affect the mode field distribution. However the effect can be reduced by cooling resonator mirrors,adopting new mirror substrate materials,improving the reflective rate of mirror and arranging mirror tilt.
彭玉峰, 陈靖, 吕珍龙, 李阔湖, 彭爱莲, 张永涛. FFT模拟腔镜畸变情况下高能CO2激光器输出模场[J]. 激光技术, 2007, 31(1): 0106. PENG Yu-feng, CHEN Jing, Lü Zhen-long, LI Kuo-hu, PENG Ai-lian, ZHANG Yong-tao. Output mode simulation for high-engergy CO2 laser with mirror deformation by means of FFT[J]. Laser Technology, 2007, 31(1): 0106.
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