Wang Yicheng, Loiko Pavel, Zhao Yongguang, Pan Zhongben, Chen Weidong, Mero Mark, Xu Xiaodong, Xu Jun, Mateos Xavier, Major Arkady, Guina Mircea, Petrov Valentin, Griebner Uwe
Opt Express. 2022 Feb 28;30(5):7883-7893. doi: 10.1364/OE.449626.
A Tm,Ho:CALGO laser passively mode-locked by a GaSb-based SESAM generated pulses as short as 52 fs at a central wavelength of 2015 nm with a broad spectral bandwidth of 82 nm (full width at half maximum) owing to the combined gain profiles of both dopants for σ-polarized light. The average output power reached 376 mW at a repetition rate of 85.65 MHz. In the continuous-wave regime, the laser was power scaled up to 1.01 W at 2080.6 nm with a slope efficiency of 32.0%, a laser threshold of 155 mW and π-polarized emission. Polarized spectroscopic properties of Ho ions in singly doped and codoped CALGO crystals were revisited to explain the observed laser performance.
一台由基于锑化镓的半导体可饱和吸收镜被动锁模的铥钬共掺铝酸镓钇镥（Tm,Ho:CALGO）激光器，在中心波长2015 nm处产生了短至52 fs的脉冲，由于两种掺杂剂对σ偏振光的增益分布叠加，其具有82 nm（半高全宽）的宽光谱带宽。在重复频率85.65 MHz时，平均输出功率达到376 mW。在连续波状态下，该激光器在2080.6 nm处功率放大至1.01 W，斜率效率为32.0%，激光阈值为155 mW，且发射π偏振光。对单掺及共掺CALGO晶体中钬离子的偏振光谱特性进行了重新研究，以解释所观察到的激光性能。
