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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 7 — Mar. 31, 2008
  • pp: 4804–4818

Passive mode locking of optical parametric oscillators: an efficient technique for generating sub-picosecond pulses

J. Khurgin, J-M. Melkonian, A. Godard, M. Lefebvre, and E. Rosencher  »View Author Affiliations

Optics Express, Vol. 16, Issue 7, pp. 4804-4818 (2008)

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We show that optical parametric generation in a nonlinear crystal with a large group velocity mismatch between the pump and nearly-degenerate signal and idler is analogous to laser amplification in the medium with a gain recovery time comparable to the walk-off time. Based on this conclusion we propose to combine an OPO with a nonlinear saturable absorber or Kerr lens to generate directly high peak power sub-picosecond pulses using pump pulses ranging from tens of picoseconds to quasi-CW. Our analytical model predicts better than 80% photon conversion efficiency and pulse lengths that are of the order of a few hundred femtoseconds. Numerical simulations confirm our predictions and show that repetitive passive mode locking is feasible with a quasi-CW pump.

© 2008 Optical Society of America

OCIS Codes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Nonlinear Optics

Original Manuscript: September 7, 2007
Revised Manuscript: October 23, 2007
Manuscript Accepted: October 25, 2007
Published: March 25, 2008

J. Khurgin, J. M. Melkonian, A. Godard, M. Lefebvre, and E. Rosencher, "Passive mode locking of optical parametric oscillators: an efficient technique for generating sub-picosecond pulses," Opt. Express 16, 4804-4818 (2008)

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