We show that the nonlinear or blue-induced IR absorption in KNbO/sub 3/ leads to a significant temperature rise in the femtosecond experiments, which must be accounted for in setting the phase-matching conditions. We investigate, for the first time to our knowledge, the focusing dependence of the phase-matching temperature. We find that the optimum phase-matching temperature significantly depends not only on the input power but also on the focusing.
Focusing effects on blue generation by frequency doubling of femtosecond pulses in KNbO/sub 3/
1999-01-01
180163 byte
Conference paper
Electronic Resource
English
British Library Conference Proceedings | 1997
|British Library Conference Proceedings | 1997
|