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Optics Letters

Optics Letters


  • Vol. 24, Iss. 24 — Dec. 15, 1999
  • pp: 1874–1876

Efficient femtosecond traveling-wave optical parametric amplification in periodically poled KTiOPO4

F. Rotermund, V. Petrov, F. Noack, V. Pasiskevicius, J. Hellström, and F. Laurell  »View Author Affiliations

Optics Letters, Vol. 24, Issue 24, pp. 1874-1876 (1999)

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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

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)

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