Optical parametric oscillation out to 6.3 mu m in periodically poled lithium niobate under strong idler absorptionстатья
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Аннотация:The very high gains, achieved when using mode-locked pulses to synchronously pump an optical parametric oscillator based on periodically poled lithium niobate, permit oscillation even with strong idler absorption. Oscillation has been achieved at idler wavelengths out to 6.3 mu m. Idler power was directly measured, out to 5.41 mu m. Beyond this, idler generation was inferred fi-om the observed signal. We present an analysis of operation in the presence of strong idler absorption. (C) 1998 American Institute of Physics.