中国激光, 2011, 38 (5): 0502012, 网络出版: 2011-05-09
宽带光再生放大幅度调制效应的研究
Theoretical Study of FM-AM Effect of Broadband Pulsed Laser in a Regenerative Amplifier
激光光学 再生放大 宽带激光 幅度调制效应 短时傅里叶变换 laser optics regenerative amplifier broadband pulsed laser FM-AM effect short-time Fourier transform
摘要
根据宽带激光在均匀加宽线型增益介质中的放大理论模型,采用短时傅里叶变换算法数值模拟了相位调制的光脉冲通过再生放大器传输放大后的时间波形,分析了再生放大过程中各个参数对幅度调制效应的影响。计算结果表明,调节光脉冲中心波长使之与增益介质中心波长匹配,提高注入种子脉冲的能量都能够有效地降低再生放大器中的幅度调制效应,提高光束质量。
Abstract
Based on the theory of broadband pulsed laser amplification in the homogeneously broadening medium, a numerical model for the temporal pulse shape propagating through the regenerative amplification is established by means of the short-time Fourier transform. Numerical simulation results show that decreasing the detuning between laser wavelength and the center wavelength of gain medium can decrease the FM-AM effect effectively. Increasing the energy of the seed laser pulse can also decrease the FM-AM effect and thus improve the laser beam quality.
卢兴华, 王江峰, 姜有恩, 范薇, 李学春. 宽带光再生放大幅度调制效应的研究[J]. 中国激光, 2011, 38(5): 0502012. Lu Xinghua, Wang Jiangfeng, Jiang You′en, Fan Wei, Li Xuechun. Theoretical Study of FM-AM Effect of Broadband Pulsed Laser in a Regenerative Amplifier[J]. Chinese Journal of Lasers, 2011, 38(5): 0502012.