Title :
Polarization-insensitive wavelength conversion in a lithium niobate waveguide by the cascading technique
Author :
Cristiani, Ilaria ; Degiorgio, Vittorio ; Socci, Luciano ; Carbone, Fabrizio ; Romagnoli, Marco
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
fDate :
5/1/2002 12:00:00 AM
Abstract :
In this letter, we present a polarization-insensitive wavelength conversion scheme based on the cascading of two second-order processes. The nonlinear device exploits a double pass configuration in a titanium indiffused waveguide realized on a periodically poled lithium-niobate substrate. Polarization-independent conversion efficiency is obtained by rotating the signal polarization state by means of a Faraday mirror. A polarization sensitivity lower than 0.8 dB is experimentally demonstrated.
Keywords :
lithium compounds; optical harmonic generation; optical phase matching; optical planar waveguides; optical wavelength conversion; wavelength division multiplexing; Faraday mirror; LiNbO/sub 3/:Ti; double-pass configuration; nonlinear device; periodically poled lithium-niobate; polarization-insensitive wavelength conversion; second-order nonlinear effects; second-order processes cascading; signal nonreciprocal polarization rotation; titanium indiffused waveguide; wavelength-division-multiplexing; Frequency; Lithium niobate; Nonlinear optical devices; Nonlinear optics; Optical polarization; Optical pumping; Optical sensors; Optical waveguides; Optical wavelength conversion; Titanium;
Journal_Title :
Photonics Technology Letters, IEEE
