利用全固化Nd∶YVO4单频激光器连续输出的1.342 μm激光, 抽运由I类临界相位匹配的LBO晶体构建的谐振倍频腔。当红外抽运光功率为1.14 W时, 获得580 mW单频红光输出, 最大倍频转换效率为50.9%。红光功率稳定性优于±0.5%(1 h), 红外光频率漂移小于±2 MHz(1 min)。

The laser at 1.342 μm wavelength from an all-solid-state single frequency Nd∶YVO4 laser was used to pump a frequency-doubler consisting of LBO crystal with type-I critical phase matching. Under the 1.14 W pump power, the second harmonic output of 580 mW is obtained with the double efficiency of 50.9%. The intensity fluctuation of the second harmonic wave at 0.671 μm is less than ±0.5% in 1 h and the laser frequency shift is better than ±2 MHz in 1 min under the condition of free running.