Efficient second harmonic generation in birefringently phase-matched GaAs/Alox waveguides

K Moutzouris, SVe Rao, Majid Ebrahimzadeh, ADe Rossi, V Berger, M Calligaro, V Ortiz

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

We report efficient second-harmonic generation of femtosecond pulses in birefringently phase-matched GaAs/Al2O3 waveguides pumped at 2.01 mum. By use of pump pulses of similar to 200-fs duration and type I interaction, practical second-harmonic average powers of up to similar to 650 muW were obtained, with an average input power of similar to 50 mW. Waveguides of four different widths and two different lengths were investigated, and a normalized conversion efficiency of greater than 1000% W-1 cm(-2) 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 similar to1.3 nm. From the measurements of transmitted pump power at the phase-matching wavelength, pump depletions of more than 80% were recorded. (C) 2001 Optical Society of America.

Original languageEnglish
Pages (from-to)1785-1787
Number of pages3
JournalOptics Letters
Volume26
Issue number22
Publication statusPublished - 15 Nov 2001

Keywords

  • ALGAAS WAVE-GUIDES
  • 2ND-HARMONIC GENERATION

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