Spectroscopic characterization and mode-locked pulse generation in Tm,Ho-codoped mixed sesquioxide crystal
Abstract
We demonstrate, for the first time to the best of our knowledge, continuous-wave (CW) and mode-locked laser operation of a Tm³⁺,Ho³⁺-codoped mixed sesquioxide crystal at ∼2.1 µm. The spectroscopic properties of the Tm,Ho:YScO₃ crystal were systematically investigated. The crystal exhibits a peak absorption coefficient of 2.50 cm -1 at 794 nm, corresponding to an absorption cross section of 2.78 × 10 −20 cm 2 , with an absorption bandwidth (full width at half maximum, FWHM) of 17.3 nm. Furthermore, the CW laser generated 0.88 W pumped by a 1700-nm Raman fiber laser, with a slope efficiency of 44.7%, and exhibited a broad CW tuning range of 197.9 nm. Remarkably, the laser delivers soliton pulses as short as 151 fs at 2112.9 nm with an average output power of 328 mW and a pulse repetition rate of ∼85.6 MHz via semiconductor saturable absorber mirror (SESAM) mode-locking.
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BibTeX
@article{liu2026spectroscopic,
title = {{Spectroscopic characterization and mode-locked pulse generation in Tm,Ho-codoped mixed sesquioxide crystal}},
author = {Jian Liu and Junyang Su and Ning Zhang and Longxin Liu and Peng Chen and Yongguang Zhao and Kheirreddine Lebbou and Peng Liu and Xiaodong Xu and Jun Xu},
journal = {Optics Express},
year = {2026},
month = nov,
doi = {10.1364/oe.571772},
url = {https://hal.science/hal-05847284v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Spectroscopic characterization and mode-locked pulse generation in Tm,Ho-codoped mixed sesquioxide crystal
AU - Jian Liu
AU - Junyang Su
AU - Ning Zhang
AU - Longxin Liu
AU - Peng Chen
AU - Yongguang Zhao
AU - Kheirreddine Lebbou
AU - Peng Liu
AU - Xiaodong Xu
AU - Jun Xu
PY - 2026
DA - 2026/11/05
JO - Optics Express
DO - 10.1364/oe.571772
UR - https://hal.science/hal-05847284v1
AB - We demonstrate, for the first time to the best of our knowledge, continuous-wave (CW) and mode-locked laser operation of a Tm³⁺,Ho³⁺-codoped mixed sesquioxide crystal at ∼2.1 µm. The spectroscopic properties of the Tm,Ho:YScO₃ crystal were systematically investigated. The crystal exhibits a peak absorption coefficient of 2.50 cm -1 at 794 nm, corresponding to an absorption cross section of 2.78 × 10 −20 cm 2 , with an absorption bandwidth (full width at half maximum, FWHM) of 17.3 nm. Furthermore, the CW laser generated 0.88 W pumped by a 1700-nm Raman fiber laser, with a slope efficiency of 44.7%, and exhibited a broad CW tuning range of 197.9 nm. Remarkably, the laser delivers soliton pulses as short as 151 fs at 2112.9 nm with an average output power of 328 mW and a pulse repetition rate of ∼85.6 MHz via semiconductor saturable absorber mirror (SESAM) mode-locking.
SN - 1094-4087
ER -