一种新型皮秒脉冲激光器

一种新型皮秒脉冲激光器由序列脉冲激光的产生、单脉冲激光的选取、放大和倍频等部分组成,激光器工作物质选用Nd∶YAG晶体,用两个格兰棱镜分别作为起偏器和检偏器,激光器的振荡级利用被动锁模染料产生的锁模序列脉冲激光,经过单脉冲选择器选取出其中的一个单脉冲激光,再经激光器放大部分的放大和倍频晶体的倍频后,激光器最终输出能量为120mJ,脉冲宽度为100ps,波长为532nm的单脉冲激光,其功率约为1.2×109W,功率密度约为4.2×109W/cm2,系统的外触发同步精度优于2μs。

A New Picosecond Pulse Laser

A new picosecond pulse laser consists of a resonator, a single pulse laser selector, two amplifiers, frequency doubling, and so on. A Nd∶YAG rod is used as active medium of laser and two Glan prisms are separately used as polarizer and analyzer of polarized light. In order to generate a series of mode-locked pulse laser lights, a passive mode-locked dye cell is used in the resonator. A single pulse laser light is obtained from the series of mode-locked pulse laser lights after they have passed the selector. Finally, after the pulse laser light has been amplified and doubled in frequency, an output of laser light beam with energy of 120 mJ and duration of laser light of 100 ps at wavelength of 532 nm is realized. It is equal about 1.2×109 W of pulse power or 4.2 ×109 W/cm2 of power density. An out-triggering synchro-precision of better than 2 μs is obtained from the laser.