4.6 Article

Mid-IR short-pulse OPCPA with micro-Joule energy at 100 kHz

Journal

OPTICS EXPRESS
Volume 17, Issue 5, Pages 3587-3594

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.17.003587

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Funding

  1. Spanish Ministry of Education and Science [SAUUL - CSD 2007-00013, CAC-2007-37, FIS2008-06368-C02-01]
  2. ICFO
  3. OCE
  4. Toptica Photonics AG
  5. Lumera Laser GmbH
  6. 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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