高功率可调谐1064 nm准连续单频激光振荡-放大系统研究

研制了高功率可调谐1064 nm准连续单频激光振荡-放大系统.振荡级采用三镜环形行波腔型结构的Nd:YAG激光器，通过精确控制腔内标准具的温度改变标准具材质折射率和厚度实现了对激光波长的调谐，获得了13.2 W调谐范围为58 GHz的1064 nm准连续单频振荡光，其重复率为1 kHz，占空比为10%.经过由双Nd:YAG激光头串接构成的放大器对振荡光进行双程放大后激光最终输出功率为44 W，光束质量因子M²= 1.58. 关键词： 可调谐激光 单频激光 标准具 振荡-放大系统

High power tunable single-frequency 1064 nm quasi-continuous-wave laser oscillator-amplifier system

We have developed a high power tunable single-frequency 1064 nm quasi-continuous-wave laser oscillator-amplifier system. By controlling precisely the temperature of etalon in the three-mirror ring traveling-wave oscillating cavity viz. adjusting refractive index and thickness of material to tune laser wavelength, 13.2 W 1064 nm single-frequency quasi-continuous-wave oscillating light with tunable range of 58 GHz is obtained, at repetition rate of 1 kHz and duty ratio of 10%. After the laser beam from the oscillator transfers through the amplifier with two laser heads, the output of the oscillator is amplified to be 44 W and the beam quality factor M² is measured to be 1.58.