期刊
OPTICS LETTERS
卷 38, 期 21, 页码 4265-4268出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.38.004265
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资金
- Swiss National Science Foundation (SNSF) [200020_144365/1]
- Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme
- U.S. Air Force Office of Scientific Research (AFOSR)
- Swiss National Science Foundation (SNF) [200020_144365] Funding Source: Swiss National Science Foundation (SNF)
We generate sub-four-cycle pulses (41.6 fs) with 12 mu J of pulse energy in the mid-infrared spectral range (center wavelength 3.4 mu m) from a high-repetition-rate, collinear three-stage optical parametric chirped-pulse amplifier (OPCPA) operating at 50 kHz. Apodized aperiodically poled MgO:LiNbO3 crystals with a negative chirp rate are employed as gain media to achieve ultrabroadband phase-matching while minimizing optical parametric generation. The seed pulses are obtained via a 1.56 mu m femtosecond fiber laser, which is spectrally broadened in a dispersion-shifted telecom fiber to support 1000 nm bandwidth idler pulses in the mid-infrared. (C) 2013 Optical Society of America
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