光学学报, 2019, 39 (6): 0614003, 网络出版: 2019-06-17
MgO∶PPLN级联倍频实现高转换效率强度调制532 nm激光 下载: 1380次
Highly Efficient Intensity-Modulated 532-nm Laser Based on Second Harmonic Generation with MgO∶PPLN Cascade
摘要
利用单块非平面环形腔单频激光器和声光移频器,获得了输出功率为10 mW的1064 nm双频激光,拍频调谐范围为125~175 MHz。采用光纤功率放大器可将1064 nm双频激光的功率放大到10 W。为了提高倍频效率,采用两块长度为15 mm的MgO∶PPLN晶体,获得功率为2.26 W的强度调制绿色激光,最高倍频效率为24.5%。当基频光的频差为150 MHz时,得到的绿光拍频分别为150 MHz和300 MHz,2 min拍频稳定性分别是2.7 Hz和5.3 Hz。
Abstract
A 10-mW 1064-nm dual-frequency laser is designed herein by using a single-frequency laser with a single non-planar ring oscillator and an acousto-optic modulator. The range of the beat frequency is 125-175 MHz. The 1064-nm dual-frequency laser is amplified to a power of 10 W by a fiber optic power amplifier. The 2.26 W intensity-modulated green laser, which corresponds to the maximum frequency-doubling efficiency of 24.5%, is obtained to improve the second harmonic generation efficiency by using two 15-mm-long MgO∶PPLN crystals. The obtained green beat frequencies are 150 MHz and 300 MHz when the frequency difference of the fundamental light is 150 MHz, and they had a 2-min beat frequency stability of 2.7 Hz and 5.3 Hz, respectively.
李坤, 杨苏辉, 王欣, 李卓, 张金英. MgO∶PPLN级联倍频实现高转换效率强度调制532 nm激光[J]. 光学学报, 2019, 39(6): 0614003. Kun Li, Suhui Yang, Xin Wang, Zhuo Li, Jinying Zhang. Highly Efficient Intensity-Modulated 532-nm Laser Based on Second Harmonic Generation with MgO∶PPLN Cascade[J]. Acta Optica Sinica, 2019, 39(6): 0614003.