【作者】 赵永蓬； 王骐； 程元丽； 栾伯晗； 吴寅初；

【Author】 Zhao Yongpeng, Wang Qi, Cheng Yuanli, Luan Bohan,Wu Yinchu National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, China, 150001;

【机构】 哈尔滨工业大学可调谐激光技术国家级重点实验室；

【摘要】 利用X射线二极管(XRD),在两台装置上测量了毛细管放电激励下类氖氩 46．9nm软X光激光的尖峰信号。改变气压和主脉冲电流的上升沿,观察了激光尖峰信号随实验参数的变化情况。我们定义主脉冲放电电流起始点到激光尖峰出现的时间间隔为激光产生时间。实验结果表明,激光产生时间在38ns-40ns,并且不随上升沿的减小而减小。当前沿为52ns时,在220mTorr-420mTorr之间较宽的气压范围内都能够观察到激光尖峰。当前沿为30ns时,仅在100mTorr附近观察到激光尖峰,并且该尖峰产生于电流峰值附近。根据理论,激光尖峰产生于压缩的停滞阶段,这对保持等离子体的稳定性、提高激光的能量转换效率非常有利。更多还原

【Abstract】 The laser spike of Ne-like argon 46.9nm pumped by capillary discharge is measured with XRD (x-ray diode) in two experimental devices. Changing pressure and the rise-time of the main current, we observe the effects of the parameters on the laser spike. The results show that the lasing time, which is the time of spike after the beginning of the main discharge current, is about 38ns~40ns and doesn’t decrease with the shorter rise-time. The laser spike can be observed in 220mTorr~420mTorr with 52ns rise-time. However with 30ns rise-time, the laser spike can only be observed about 100mTorr and appears around the peak of current. According to the theory, the lasing spike occurs at stagnation, which is beneficial to keep the stability of the plasmas and to improve the energy conversion efficiency of the laser.更多还原