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Polarization-insensitive wavelength conversion in a lithium niobate waveguide by the cascading technique

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5 Author(s)
Cristiani, I. ; Dipt. di Elettronica, Pavia Univ., Italy ; Degiorgio, V. ; Socci, L. ; Carbone, F.
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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.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 5 )