Abstract
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
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