Mode-locking of a Tm,Ho:CALYGO laser delivering 50 fs pulses at 2.08 m

Heng Ding,Jian Liu,Yinyin Wang,Ning Zhang,Zhanxin Wang,Yongguang Zhao,Xiaodong Xu,Yanyan Xue,Jun Xu,Uwe Griebner,Valentin Petrov

OPTICS LETTERS（2023）

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摘要

We study the polarization-dependent laser performance of a novel, to the best of our knowledge, "mixed" Tm,Ho:CaYGdAlO4 crystal in the continuous-wave (CW) and mode-locked regimes. Both in terms of the CW tun -ability range (261 nm) and the minimum pulse duration (50 fs at 2078 nm, spectral width of 95 nm) in the mode -locked regime, sigma-polarization is superior. With extended inhomogeneous spectral broadening due to structural and compositional disorder, Tm,Ho:CaYGdAlO4 is promising for few-optical-cycle pulse generation around 2 mu m. (c) 2023 Optica Publishing Group

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