Journal
OPTICS EXPRESS
Volume 17, Issue 5, Pages 3587-3594Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.003587
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Funding
- Spanish Ministry of Education and Science [SAUUL - CSD 2007-00013, CAC-2007-37, FIS2008-06368-C02-01]
- ICFO
- OCE
- Toptica Photonics AG
- Lumera Laser GmbH
- ICREA Funding Source: Custom
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We present a novel mid-IR source based on optical parametric chirped pulse amplification (OPCPA) generating 96 fs pulses (9.0 cycles) at 3.2 mu m with an energy of 1.2 mu J, at a repetition rate of 100 kHz. The amplified spectrum supports a minimum Fourier transform limited pulse duration of 45 fs, or 4.2 cycles. Our use of OPCPA allows the direct amplification of few-cycle pulses at this mid-IR wavelength, and is inherently scalable to higher energies. The seed source for the system is based on difference frequency generation (DFG) between two outputs of the same fibre laser: this source is expected to be intrinsically CEP stable. (C) 2009 Optical Society of America
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