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 acquire 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.
Cross-phase modulation due to a cascade of quadratic interactions in a PPLN waveguide
Galzerano G;
2006
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 acquire 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
