偏振对种子注入影响的研究

针对2.09 μm单频Ho∶YAG激光器种子注入实验中声光布拉格衍射对不同偏振态的影响进行了理论分析,由于不同偏振态在声光介质中的折射率不同,计算了s偏振光和p偏振光通过声光晶体后的最大偏移距离,同时对两束偏振光经过布拉格衍射进入F-P腔后的输出信号进行了理论分析计算及仿真,并通过实验进行了验证。     

1 kHz single-frequency,injection-seeded Er:YAG laser with an optical feedback

A novel 1 kHz single-frequency, Q-switched Er-doped yttrium aluminum garnet(Er:YAG) laser pumped by a 1470 nm laser diode is demonstrated. The 500 ns, 5.52 mJ single-frequency, diffraction-limited pulses are obtained by using a ‘ramp-fire' injection-seeding technique and an optical feedback architecture. The full width at half-maximum of the pulse spectrum is measured to be 1.47 MHz by using the heterodyne technique. The beam quality M2 factors are measured to be 1.18 and 1.24 in the x and y directions, respectively.