Jin Pixian, Lu Huadong, Su Jing, Peng Kunchi
Appl Opt. 2016 May 1;55(13):3478-82. doi: 10.1364/AO.55.003478.
We present a novel and efficient scheme to enhance the stability of laser output via feedback control to a nonlinear loss deliberately introduced to the laser resonator. By means of the feedback control to the intracavity nonlinear loss of an all-solid-state continuous-wave single-frequency laser with high output power at 1064 nm, its intensity and frequency stabilities are significantly improved. A lithium triborate crystal is deliberately placed inside the laser resonator to be an element of the nonlinear loss, and the temperature of the crystal is feedback controlled by an electronic loop. The control signal is generated by distinguishing the deviation of the output power and used for manipulating the intracavity nonlinear loss to compensate the deviation of the laser power actively. With the feedback-control loop, the intensity and frequency fluctuations of the output laser at 1064 nm are reduced from ±0.59% and 21.82 MHz without the feedback to ±0.26% and 9.84 MHz, respectively.
我们提出了一种新颖且高效的方案，通过对故意引入激光谐振器的非线性损耗进行反馈控制来增强激光输出的稳定性。借助对腔内非线性损耗的反馈控制，对于一台输出功率为1064nm的全固态连续波单频高功率激光器而言，其强度和频率稳定性得到显著提升。特意在激光谐振器内部放置一块硼酸锂晶体作为非线性损耗元件，并且通过一个电子回路对该晶体的温度进行反馈控制。控制信号通过区分输出功率的偏差来产生，并用于操纵腔内非线性损耗，从而主动补偿激光功率的偏差。借助该反馈控制回路，1064nm输出激光的强度和频率波动分别从无反馈时的±0.59%和21.82MHz降低至±0.26%和9.84MHz。
