We report on the theoretical analysis of an optical parametric oscillator in which a succession of parametric amplifications takes place to achieve more than 200% quantum efficiency at the wavelength of interest. The first interaction generates the desired radiation, which we call the signal, whatever its wavelength, and its complement, which we called the idler. When the idler is of no particular interest it is used as the pump in a second interaction to amplify the same signal, increasing the quantum efficiency for this radiation. The same type of process can be applied again until the maximum efficiency is reached.
© 1999 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
L. Becouarn, E. Lallier, D. Delacourt, and M. Papuchon, "Architecture for high-conversion-efficiency optical parametric oscillators," J. Opt. Soc. Am. B 16, 1712-1718 (1999)