title: Difference-frequency generation in AlGaAs Bragg reflection waveguides.
abstract: We demonstrate Type II difference-frequency generation (DFG) around 1550 nm in AlGaAs Bragg reflection waveguides using a pump around 778 nm and a signal within the C-band range. Difference-frequency power of 0.95 nW was obtained using a pump power of 62.9 mW and a signal power of 2.9 mW. Nonlinear conversion efficiency was estimated to be 2.5 x 10(-2)%/W(-1) cm(-2) in a 1.5-mm-long sample. Using numerical simulations, the phase-matching bandwidth was predicted to be 100 nm, while the measured DFG showed no sign of bandwidth limitation across a wavelength span of 40 nm, which was limited by instrumentation.
authors.affiliation: The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada.
authors.forename: Jun-Bo
authors.initials: JB
authors.lastname: Han
authors.forename: Payam
authors.initials: P
authors.lastname: Abolghasem
authors.forename: Dongpeng
authors.initials: D
authors.lastname: Kang
authors.forename: Bhavin J
authors.initials: BJ
authors.lastname: Bijlani
authors.forename: Amr S
authors.initials: AS
authors.lastname: Helmy