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Proceedings Paper

Optical parametric generation of high-energy femtosecond pulses in the 1-3 µm spectral range using BiB3O6
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Paper Abstract

We analyze the phase-matching properties of the monoclinic nonlinear crystal BiB3O6 (BIBO) for optical parametric amplification of femtosecond pulses when pumped near 800 nm by Ti:sapphire based laser systems. BIBO possesses higher figure of merit than &bgr;-BaB2O4 (BBO) and extremely large parametric gain bandwidth for collinear interaction. Experimentally, we compare type-II BIBO and BBO in a double pass optical parametric amplifier (OPA), pumping by amplified 80-fs pulses near 800 nm at a repetition rate of 1 kHz. The conversion efficiency obtained with BIBO is higher and a total energy output (signal + idler) of about 80 &mgr;J is obtained in the plateau region of the tunability curve (1-3 &mgr;m) with an uncoated sample, for a total pump energy of 375 &mgr;J. Shorter pulse durations were obtained with BIBO: e.g. 120 fs (FWHM) near 3 &mgr;m for the idler pulses. Substantial power scaling of such a femtosecond OPA is possible using a large aperture BIBO crystal in the second stage and we demonstrate a total energy output (signal + idler) exceeding 1 mJ, corresponding to an intrinsic conversion efficiency of ≈32% for the second stage, using a specially designed high-power Ti:sapphire pump system operating at 1 kHz. The tunability extends in this case from 1.1 to 2.9 &mgr;m. The high parametric gain and broad amplification bandwidth of type-I BIBO allow the maintenance of the pump pulse duration, leading to pulse lengths less than 140 fs, both for the signal and idler pulses, even at such high output levels.

Paper Details

Date Published: 14 February 2007
PDF: 12 pages
Proc. SPIE 6455, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI, 64550C (14 February 2007); doi: 10.1117/12.700094
Show Author Affiliations
Valentin Petrov, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Masood Ghotbi, ICFO The Institute of Photonic Sciences (Spain)
Pancho Tzankov, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Frank Noack, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Ivailo Nikolov, Sofia Univ. (Bulgaria)
Ivan Ch. Buchvarov, Sofia Univ. (Bulgaria)
Majid Ebrahim-Zadeh, ICFO The Institute of Photonic Sciences (Spain)


Published in SPIE Proceedings Vol. 6455:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI
Peter E. Powers, Editor(s)

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