位相畸变对强紫外激光在空气中长程传输的影响

罗莉; 李廷红; 张彬

强激光与粒子束, 2005, 17 (1): 59, 网络出版: 2006-04-28

位相畸变对强紫外激光在空气中长程传输的影响

Effect of phase perturbation on high power ultraviolet laser beams in long air path

论文大纲

罗莉李廷红张彬

作者单位

四川大学,电子信息学院,四川,成都,610064

位相畸变光束质量受激旋转拉曼散射 Phase perturbation Beams quality Stimulated rotational Raman scattering

摘要

采用瞬态受激旋转拉曼散射(SRRS)模型,详细考虑了激光脉冲的位相变化、时间波形、泵浦光的衰减、斯托克斯光的非线性放大以及初始的随机斯托克斯散射场等诸多因素,研究了空间位相畸变对空气中长程传输过程中产生的SRRS效应的影响.研究结果表明:位相畸变对阈值条件和时间特性影响较小,而对光束质量影响较为明显; 随着位相畸变的增大,光束的能量分布变得极不均匀,光束的光强对比度也明显变大,从而使激光光束质量变差,而且当传输距离达到阈值条件后,随着传输距离的增加,光束质量将进一步变差.

Abstract

Using the model of transient stimulated rotational Raman scattering (SRRS) and considering many factors such as phase change of laser beams, the pulsed-shape, the depletion of pump laser, the nonlinear amplification of the Stokes field, and the initial random Stokes scattered field, etc, the effect of the spatial phase perturbation on the SRRS of high-power ultraviolet laser beams in long air path has been studied. It is shown that the effects on the threshold of SRRS and the temporal pulse profile are weak. However, the effect on the beam quality is very evident. It is also shown that the energy distribution of the beam becomes more non-uniform and the beam intensity contrast increases sharply as the phase perturbation grows, reducing the beam quality. When the propagation distance is beyond the threshold condition, the damage on the beam quality will be more evident.

参考文献

[1] Carman R L, Shimizu F. Theory of Stokes pulse shapes in transient stimulated Raman scattering[J]. Physical Review, 1970, 2(1): 60-72.

[2] Henesian A, Pennington M. Diffraction properties of laser speckle generated by stimulated rotational Raman scattering in long air paths[A].Proc of SPIE[C]. 1988, 874: 2-15.

[3] Ying L, Terrance K. Raman scattering in air, a four-dimensional system analysis[A]. Proc of SPIE[C]. 1992, 1625: 158-166.

[4] Ying L, Terrance K, Armstrong J J. Laser system power balance effects from stimulated rotational Raman scattering in air[A]. Proc of SPIE[C]. 1992, 1870: 14-25.

[5] 李廷红,张彬,蔡邦维,等.强紫外激光在空气中长程传输受激旋转拉曼散射效应[J].强激光与粒子束,2003,15(10):937-939.
Li T H,Zhang B, Cai B W,et al. Stimulated rotational Raman scattering of high-power ultraviolet laser beams in long air path[J]. High Power Laser and Particle Beams, 2003, 15(10): 937-939.

[6] Auerbach J M, Eimerl D, Milam D, et al. Perturbation theory for electric-field amplitude and phase ripple transfer in frequency doubling and tripling[J]. Applied Optics, 1997, 36(3) : 606-612.

[7] 李强,张彬,粟敬钦,等.高强度三次谐波转换过程中位相扰动的变化[J].强激光与粒子束,2004,16(3):313-316.
Li Q,Zhang B,Su J Q,et al. Variation of phase perturbation in high power third harmonics conversion[J]. High Power Laser and Particle Beams, 2004, 16(3): 313-316.

[8] Lawson J K, Auerbach J M, English R E, et al. NIF optical specification-theimportance of the RMS gradient[A]. Proc of SPIE[C].1999,3932: 336-342.

罗莉, 李廷红, 张彬. 位相畸变对强紫外激光在空气中长程传输的影响[J]. 强激光与粒子束, 2005, 17(1): 59. LUO Li, LI Ting-hong, ZHANG Bin. Effect of phase perturbation on high power ultraviolet laser beams in long air path[J]. High Power Laser and Particle Beams, 2005, 17(1): 59.

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