Polarization‐insensitive wavelength conversion with a constant output linear polarization allowing the realization of an active polarization controller

Abstract

In this work, we demonstrate theoretically and experimentally a technique allowing us to realize a polarization-insensiti¨e wa¨elength con¨ersion with an output beam whose polarization state is unique and linear for all input signal polarization states. ᮊ ABSTRACT: A circularly polarized cylindrical dielectric resonance antenna excited by two conformal strips of unequal lengths is studied experimentally. By using unequal strip lengths, two nearly degenerate orthogonal modes are excited and circularly polarized fields are generated. The measured return loss, axial ratio, radiation pattern, and antenna gain of the configuration are discussed. ᮊ

Degradation by the cross-polarization modulation of the conversion efficiency of a wavelength converter based on FWM in a SOA

“…In order to overcome this inconvenience, the model was modified including the "cross-effects" derived from the beating of the E x components of the electric fields of the input signals that interact with the E y components and vice versa as it proposed in ref. 8. As a result, when a FWM process is developed with pump and probe signals having uncorrelated and arbitrary polarizations (different of TE or TM), four components, two arising from "direct-beatings" and two arising from "cross-beatings", compose the total electric field of the conjugated signal.…”