Lu Huadong, Guo Yongrui, Peng Kunchi
Opt Lett. 2015 Nov 15;40(22):5196-9. doi: 10.1364/OL.40.005196.
The influences of intracavity nonlinear losses on the intensity noise of output lasers are theoretically and experimentally investigated with an all-solid-state single-frequency laser with high gain. By means of tuning the temperature of a nonlinear crystal deliberately placed inside the laser resonator, the intracavity nonlinear loss of the laser is controlled. The dependence of the frequency and amplitude of the resonant relaxation oscillation peak on the nonlinear loss is studied in detail for both fundamental-wave (FW) and second-harmonic-wave (SHW). We find that, by controlling the temperature of the nonlinear crystal, the intensity noises of the laser can be transferred between FW and SHW. The theoretical predictions are in good agreement with the experimental measurements. The obtained results can be applied to manipulate and suppress the laser noises.
利用高增益全固态单频激光器，从理论和实验上研究了腔内非线性损耗对输出激光强度噪声的影响。通过有意调节置于激光谐振腔内的非线性晶体的温度，控制激光器的腔内非线性损耗。针对基波（FW）和二次谐波（SHW），详细研究了谐振弛豫振荡峰的频率和幅度对非线性损耗的依赖性。我们发现，通过控制非线性晶体的温度，激光的强度噪声可以在基波和二次谐波之间转移。理论预测与实验测量结果吻合良好。所得结果可应用于操控和抑制激光噪声。
