论文部分内容阅读
基于Pound-Drever-Hall外腔谐振倍频技术,实现了单频、连续1064nm基频光的高效倍频转换。精确锁定环形倍频腔腔长,利用I类非临界相位匹配三硼酸锂晶体获得了最高8.73 W的倍频绿光输出,倍频效率为68.9%。在此基础上,研究了倍频绿光的波长锁定与调谐特性,当30min内波长锁定均方根值小于3fm时,实现了输出绿光波长在532.15~532.50nm范围内的连续可调。采用自外差拍频法测量了单频绿光的光谱特性,谱线线宽为18.7kHz,光束质量因子为1.25,光束质量优异。
Based on the Pound-Drever-Hall external resonant frequency doubling technique, a single-frequency, continuous 1064nm fundamental frequency light with high efficiency is achieved. The cavity length of the ring-shaped double-frequency cavity was precisely locked. The maximum frequency of 8.73 W was obtained by using class I non-critical phase-matched lithium triborate crystals, and the frequency doubling efficiency was 68.9%. On this basis, the wavelength locking and tuning characteristics of frequency-doubling green light are studied. When the root mean square value of wavelength locking is less than 3 fm within 30 min, the output wavelength of green light is continuously adjustable from 532.15 to 532.50 nm. The heterodyne beat frequency method was used to measure the spectral characteristics of single-frequency green light. The linewidth of the spectrum was 18.7 kHz, the beam quality factor was 1.25, and the beam quality was excellent.