Efficient femtosecond traveling-wave optical parametric amplification in periodically poled KTiOPO4
Optics Letters, Vol. 24, Issue 24, pp. 1874-1876 (1999)
http://dx.doi.org/10.1364/OL.24.001874
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Abstract
We report, for the first time to our knowledge, high-power femtosecond traveling-wave optical parametric amplification by use of periodically poled KTiOPO4 . With a single pass through a 4-mm-long sample of 1.23-mm thickness we achieved 40% internal conversion efficiency and 5µJ of single-pulse idler energy near 3.8µm , using only 75µJ of energy from the output of a conventional 1-kHz Ti:sapphire regenerative amplifier. The 210-fs-long idler pulses were almost transform limited. We discuss the specific problems encountered in high-power parametric conversion, such as unwanted quasi-phase-matched upconversion processes for polarization configurations that utilize the largest (d33) nonlinear coefficient and the related formation of color centers (gray tracking) in KTiOPO4 .
© 1999 Optical Society of America
OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
Citation
F. Rotermund, V. Petrov, F. Noack, V. Pasiskevicius, J. Hellström, and F. Laurell, "Efficient femtosecond traveling-wave optical parametric amplification in periodically poled KTiOPO4," Opt. Lett. 24, 1874-1876 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-24-1874
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