Abstract
We report efficient second-harmonic generation of femtosecond pulses in birefringently phase-matched waveguides pumped at . By use of pump pulses of duration and type I interaction, practical second-harmonic average powers of up to were obtained, with an average input power of . Waveguides of four different widths and two different lengths were investigated, and a normalized conversion efficiency of greater than was obtained for a 1-mm waveguide. Measurements of pump and second-harmonic spectra provided clear evidence of phase matching and depletion of the pump spectrum. The measured bandwidth of the second harmonic was . From the measurements of transmitted pump power at the phase-matching wavelength, pump depletions of more than 80% were recorded.
© 2001 Optical Society of America
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