We discuss the use of aperiodically poled nonlinear crystals to improve conversion efficiency in a synchronously pumped ultrafast optical parametric oscillator. We show theoretically that with these crystals the conversion efficiency can be considerably higher than that obtained when a periodically poled crystal with the same length is used. Moreover, we show that pump threshold can be simultaneously improved by use of longer crystals.
© 2002 Optical Society of America
David Artigas* and Derryck T. Reid, "Efficient femtosecond optical parametric oscillators based on aperiodically poled nonlinear crystals," Opt. Lett. 27, 851-853 (2002)