端面抽运Tm，Ho：YLF激光器双稳特性的理论分析与实验研究

报道了波长为792nm激光二极管端面抽运Tm，Ho：YLF连续激光器的双稳输出特性.在考虑能量传递上转换和基态对2μm激光重吸收的前提下，建立了Tm，Ho：YLF双稳激光器准三能级速率方程理论模型.通过对Tm，Ho：YLF激光器速率方程的求解，理论预见了Tm，Ho：YLF激光器双稳输出的特性，并分析了其产生的机理.进行了激光二极管端面抽运Tm，Ho：YLF激光器双稳输出的实验研究，当激光晶体温度为253K时，双稳区的宽度可达1.6W，跃变点输出功率的跃变量可达82.5mW.通过对比发现理论结果与实验结果比 关键词： 端面抽运 Tm Ho：YLF晶体 连续输出 光学双稳

Theoretical and experimental investigation of optical bistability in end-pumped Tm,Ho:YLF lasers

We demonstrate the strong optical bistability of a 2μm continuous wave Tm，Ho：YLF laser end pumped by a 792nm fiber-coupled laser diode. The quasi-three-level rate equation theoretical model is given under consideration of the energy transfer upconversion and ground state reabsorption effects. The bistable output of Tm，Ho：YLF laser is predicted theoretically by solving the coupled rate equations and the mechanism of the bistability output is analyzed. The bistable output is also studied experimentally. When the laser crystal is at 253K，the width of the bistable region is 1.6W and the jump power at the tujump point is 82.5mW. The theoretical results are in agreement with the experimental results，showing that the theoretical model is reasonable.