1. Femtosecond pulse generation from a Tm:CaYLuAlO4 laser employing a birefringent filter as wavelength selector.
- Author
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Dong, Lulu, Zhang, Ning, Ding, Heng, Wang, Peifu, Liu, Yichen, Wang, Zhanxin, Liu, Jian, Zhao, Yongguang, Liu, Shande, Xu, Xiaodong, and Xu, Jun
- Subjects
FEMTOSECOND pulses ,FEMTOSECOND lasers ,TUNABLE lasers ,WAVELENGTHS ,MODE-locked lasers ,WATER vapor ,LASERS ,LIGHT filters - Abstract
In this paper, we demonstrate a SESAM mode-locked Tm:CaYLuAlO
4 (a-cut) laser in the 2-μm spectral range. A birefringent filter (BF) is employed to shift the emission wavelength above 2 μm to support the stable mode locking through avoiding the structured water vapor absorption. Pulses as short as 288 fs are generated with a central wavelength of 2037 nm and an average power of 166 mW at a repetition rate of ~ 77.6 MHz. Moreover, wavelength tunable femtosecond laser with a tuning range from 2031.8 to 2081.1 nm is realized simply by rotating the birefringent filter around its surface normal. This work experimentally shows that birefringent filter is a simple and low-cost way to support the stable mode locking of Tm-bulk femtosecond lasers with an emission peak in the water vapor absorption region. [ABSTRACT FROM AUTHOR]- Published
- 2023
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