Spectroscopic characterization and mode-locked pulse generation in Tm,Ho-codoped mixed sesquioxide crystal
Year: 2025
Type: article
Abstract: We demonstrate, for the first time to the best of our knowledge, continuous-wave (CW) and mode-locked laser operation of a Tm 3+ ,Ho 3+ -codoped mixed sesquioxide crystal at ∼2.1 µm. The spectroscopic properties of the Tm,Ho:YScO 3 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.
Source: Optics Express
DOI: 10.1364/oe.571772
Authors: Jian Liu, Junyang Su, Ning Zhang, Longxin Liu, Peng Chen, Yongguang Zhao, Kheirreddine Lebbou, Peng Liu, Xiaodong Xu, Jun Xu
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: G2166054524, G6412593922, G8192440854
OpenAlex ID: W4416101532