Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 127, Issue 4, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00340-021-07587-9
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Funding
- National Natural Science Foundation of China [91850209, 11774410, 61575217]
- Key-Area Research and Development Program of Guangdong Province [2018B090904003]
- Strategic Priority Research Program of CAS [XDB16030200]
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In this study, the pulse duration of a Nd: YVO4 regenerative amplifier is compressed to 172 fs using a two-stage MPC system, achieving a pulse energy of 117 μJ with a total efficiency of 51%. This method has the potential to generate high power femtosecond lasers at 10 ps level, with high efficiency, compact configuration, and low cost.
The device of multi-pass-cell (MPC) could broaden the spectra of ultrafast laser pulses based on the self-phase-modulation (SPM) effect, which is composed of two concave mirrors and nonlinear mediums. In this paper, the pulse duration of 172 fs is compressed from a 11.3 ps Nd: YVO4 regenerative amplifier at the repetition rate of 1 kHz by using two stages of MPC systems. The pulse duration is shortened by a factor of 66, and the pulse energy of 117 mu J is obtained with a total efficiency of 51%. With high average power Nd-doped laser systems at 10 ps level, this method has the potential to generate high power femtosecond lasers with high efficiency, compact configuration, and low cost.
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