期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 31, 期 21, 页码 1741-1744出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2019.2944256
关键词
Ultrabroadband sources; parametric amplifiers
资金
- Science and Engineering Research Council (SERC), Singapore [1426500050, 1426500051, A1890b0049]
We report a microjoule, 10.3 mu m, mid-infrared (MIR) intrapulse difference frequency generation (IPDFG) in GaSe, driven by a 3 mu m optical parametric chirped-pulse amplifier. The generated IPDFG pulse spanning from 7 to 15 mu m in spectrum is measured with a pulse width of 60 fs, corresponding to 1.8 optical cycles. We experimentally confirmed that the spectral broadening of the driving pulses caused by the self-phase modulation in GaSe plays a crucial role in the process of IPDFG. To the best of our knowledge, this is the first exploration of IPDFG driven at 3 mu m wavelength. It provides an approach to generate few-cycle long-wavelength MIR pulses, with the recent rapid development of the 3 mu m driving sources.
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