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Sub-60-fs SESAM mode-locked Yb, Y: CaF2-SrF2 laser
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OA
AI
S
Y
C
张
F
Z
J
L
DOI：10.1364/OE.550289.png)
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Abstract
En 中文
We conducted a comprehensive study on the optical spectroscopy properties and laser performances of a Yb, Y: CaF2-SrF2 co-doping mixed crystal. Our investigation included an analysis of the absorption, emission, and gain cross-sections, and we were able to achieve a wide tuning range of 75.4 nm. Notably, we obtained a maximum average output power of 265 mW with a remarkable 58.3% optical efficiency under 658 mW absorbed pump power in the continuous wave regime. In the mode-locked regime, we achieved a pulse duration of 53 fs and an average output power of 30 mW using a commercial semiconductor saturable absorber mirror (SESAM). The pulse peak power was 5.82 kW, corresponding to a repetition rate of 88.8 MHz. These findings suggest that the Yb, Y: CaF2-SrF2 crystal shows promise as a new type of laser material, providing valuable insights for advancing disordered materials and incorporating other rare earth ions. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keywords:
DIODE
FEMTOSECOND
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3.3
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