中国激光, 2006, 33 (suppl): 144, 网络出版: 2006-04-21
高重复频率融石英棒受激布里渊散射相位共轭实验研究
Experimental Study on High Repetition Rate Quartz Glass Rod Stimulated Brillioum Scattering Phase-Conjugation
激光技术 双通放大器 光学相位共轭 石英玻璃棒 laser technique double-pass amplifier optical phase conjugation quartz glass rod
摘要
在高重复频率激光二极管抽运Nd:YAG激光双通放大器中,采用石英玻璃棒作为相位共轭镜取代传统的0°全反镜,进行了光学相位共轭实验研究。在重复频率400 Hz,注入脉冲宽度20 ns下形成了稳定的光学相位共轭,较好地补偿了增益介质热效应造成的光束畸变,改善了双通放大输出光斑分布。采用0°全反镜双通输出光斑分布中的较强环状衍射调制得到了很好的消除,获得了较好光束质量的激光输出,放大器输出光束质量因子M2值由4左右提高到1.4,同时避免了非线性介质内部的光学击穿和损伤。
Abstract
An experimental study on optical phase conjugation is developed in a double-pass high repetition rate laser diode pumped Nd:YAG amplifier. The traditional 0° HR mirror is replaced with a quartz glass rod phase conjugator. A stable phase conjugating reflection is realized at 400 Hz repetition rate with a 20 ns pulse width input. As a result, the beam distortion caused by the thermal effect of the gain medium is well compensated, and a better amplified output beam profile with no diffraction ring is observed. The output beam M2 is improved from 4 to 1.4. The optical breakdown or injury in quartz glass is avoided.
童立新, 高清松, 陈晓琳, 陈军, 唐淳, 刘芳. 高重复频率融石英棒受激布里渊散射相位共轭实验研究[J]. 中国激光, 2006, 33(suppl): 144. 童立新, 高清松, 陈晓琳, 陈军, 唐淳, 刘芳. Experimental Study on High Repetition Rate Quartz Glass Rod Stimulated Brillioum Scattering Phase-Conjugation[J]. Chinese Journal of Lasers, 2006, 33(suppl): 144.