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采用四镜环行谐振腔，通过正确选择Ｎｄ：ＹＡＰ棒的方位，提高了内腔激光偏振度，降低了热效应的影响，在输入１．２ｋＷ电功率的情况下，输出单频激光功率为１．２Ｗ．波动小于２％．频率的长期稳定性小于±０．４ＭＨｚ。
The quadrupole ring resonator is used to improve the polarization degree of the laser cavity and reduce the influence of thermal effect by correctly selecting the orientation of the Nd: YAP rod. Under the input of 1.2kW electric power, the output single-frequency laser power is 1.2W . Fluctuation is less than 2%. Long-term stability of the frequency is less than ± 0.4MHz.