95 fs pulses with 1.21MW peak power from diode-pumped ultrafast Yb:CaGdAlO4 laser using an additional Kerr medium
95 fs pulses with 1.21MW peak power from diode-pumped ultrafast Yb:CaGdAlO4 laser using an additional Kerr medium
复制标题
使用附加 Kerr 介质的二极管泵浦超快 Yb:CaGdAlO4 激光器产生 95 fs 脉冲，峰值功率为 1.21MW
DOI：
10.1016/j.optcom.2021.127246
复制
发表时间：
2021
影响因子：
2.4
通讯作者：
Xiaohua Zhang
中科院分区：
文献类型：
--
作者：
Xianghao Meng;Xiaona Ban;Chong Lv;Qiushi liu;Mingjiang Ma;Baozhen Zhao;Xiaohua Zhang
从理论上分析了二极管泵浦克尔透镜锁模Yb:CGA振荡器的热效应。采用有限元模拟方法计算了Yb:CGA晶体的温度分布。计算了不同泵浦功率下晶体内热透镜的焦距。使用额外的熔融二氧化硅作为Kerr介质，我们演示了一个高功率二极管泵浦飞秒Yb:CGA振荡器。激光器在65 MHz的重复频率下提供95 fs的脉冲持续时间，平均功率为7.5 W。对应的脉冲能量为115 nJ，峰值功率为1.21 MW。采用增益材料与克尔介质分离的方法，输出功率可扩展到多瓦，而脉冲持续时间保持在100fs以下的水平。
We theoretically analyzed the thermal effects in a diode-pumped Kerr-lens mode-locked Yb:CGA oscillator. The calculation of temperature distribution in the Yb:CGA crystal was performed with finite element simulations. The thermal lens focal length in the crystal was calculated at different pump power levels. Using an additional fused silica as the Kerr medium, we demonstrated a high-power diode-pumped femtosecond Yb:CGA oscillator. The laser delivered 95 fs pulse duration with an average power of 7.5 W at the repetition rate of 65 MHz,.which corresponding to 115 nJ of the pulse energy and 1.21 MW of the peak power. With the method of separation of the gain material and Kerr medium, the output power can be scalable to multi-Watts while the pulses duration is maintained at sub-100 fs level.