Hamburg 2009 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 14: Ultrakurze Pulse: Erzeugung II
Q 14.5: Talk
Monday, March 2, 2009, 17:30–17:45, VMP 8 R206
Optical Parametric Amplification in the NIR in a gaseous medium by use of a hollow fibre — •Alexander Grün1, Daniele Faccio1,3, Arnaud Couairon4, Philip K. Bates1, Olivier Chalus1, and Jens Biegert1,2 — 1ICFO-Institut de Cienciès Fotóniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain — 2ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain — 3CNISM-Dipartimento di Fisica e Matematica, Università dell'Insubria, IT-22100 Como, Italy — 4CNRS-Centre de Physique Théorique, École Polytechnique, F-91128, Palaiseau, France
Nonlinear optical interactions in gas-filled hollow fibres are currently widely employed for the generation of intense, few-cycle laser pulses, playing a particularly important role in strong field physics applications such as attosecond pulse generation. Shifting the center wavelength of such few-cycle pulses toward the MIR is of great importance for the generation of shorter attosecond pulses, and allow improved efficiency in extreme ultraviolet (EUV) generation.
Here we report for the first time, to the best of our knowledge, efficient optical parametric amplification (OPA) of ultrashort intense laser pulses in a gaseous medium in the near infrared (NIR). By properly exciting the modes of the capillary and by further optimization of the gas pressure we show broadband phase-matched OPA with a gain exceeding 30 dB at the input seed wavelength of 400 nm and generation of high energy 4 μJ NIR pulses that are also expected to be passively carrier-envelope phase (CEP) locked.