Journal
APPLIED SCIENCES-BASEL
Volume 11, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/app11209464
Keywords
ultrafast laser; solid-state laser; ytterbium laser; mode-locking
Categories
Funding
- National Natural Science Foundation of China [61975208, 51761135115, 61850410533, 62075090, 52032009, 52072351]
- Sino-German Scientist Cooperation and Exchanges Mobility Program [M-0040]
- Foundation of the President of China Academy of Engineering Physics [YZJJLX2018005]
- Foundation of Key Laboratory of Optoelectronic Materials Chemistry and Physics, Chinese Academy of Sciences [2008DP173016]
- Foundation of State Key Laboratory of Crystal Materials, Shandong University [KF2001]
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Passive mode-locking of a disordered Yb:Ca3Gd2(BO3)(4) crystal using SESAM was successfully demonstrated, generating nearly Fourier-transform-limited pulses with high efficiency and low laser thresholds. Continuous wavelength tuning and promising potential for ultrafast laser development at around 1 μm were also shown in the study.
We report on the first passively mode-locked femtosecond-laser operation of a disordered Yb:Ca3Gd2(BO3)(4) crystal using a SEmiconductor Saturable Absorber Mirror (SESAM). Pumping with a single-transverse mode fiber-coupled laser diode at 976 nm, nearly Fourier-transform-limited pulses as short as 96 fs are generated at 1045 nm with an average output power of 205 mW and a pulse repetition rate of similar to 67.3 MHz. In the continuous-wave regime, high slope efficiency up to 59.2% and low laser thresholds down to 25 mW are obtained. Continuous wavelength tuning between 1006-1074 nm (a tuning range of 68 nm) is demonstrated. Yb:Ca3Gd2(BO3)(4) crystals are promising for the development of ultrafast lasers at similar to 1 mu m.
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