Title :
Cross-phase modulation due to a cascade of quadratic interactions in a PPLN waveguide
Author :
Liberale, Carlo ; Cristiani, Ilaria ; Degiorgio, Vittorio ; Marangoni, Marco ; Galzerano, Gianluca ; Ramponi, Roberta
Author_Institution :
Dipt. di Elettronica, Univ. di Pavia, Italy
Abstract :
The cross-phase modulation of a weak signal has been obtained in a periodically poled lithium-niobate waveguide as a result of the quadratic interaction of the signal with the second harmonic of an intense pump field. The nonlinear phase acquired by the signal has been measured as a function of the pump field intensity and of the phase mismatch with the second harmonic field. The measurements have been performed with a properly designed experimental setup based on a Mach-Zehnder interferometric scheme, which proved to be quite insensitive to slow mechanical and thermal drifts. Numerical simulations are in good agreement with experimental results.
Keywords :
Mach-Zehnder interferometers; lithium compounds; optical harmonic generation; optical modulation; optical phase matching; optical pumping; optical waveguides; phase modulation; LiNbO3; Mach-Zehnder interferometer; cross-phase modulation; nonlinear phase; periodically poled lithium-niobate waveguide; phase mismatch; pump field intensity; quadratic interaction; second harmonic; Frequency; Nonlinear optics; Optical harmonic generation; Optical interferometry; Optical pumping; Optical waveguides; Optical wavelength conversion; Phase measurement; Signal generators; Signal processing; Frequency conversion; Mach–Zehnder interferometers; lithium niobate; nonlinear optics; optical waveguides; phase measurement;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2006.871928
