Novel configuration for polarization-independent, wavelength-shift-free optical phase conjugator using a nonlinear fiber Sagnac interferometer

Summary form only given. We propose and experiment with a novel configuration, which we believe is much simpler than the optical parametric loop mirror (PALM) configuration, for wavelength-shift-free optical phase conjugation. We show the configuration of the optical phase conjugator we propose. It consists of a nonlinear fiber Sagnac interferometer (NFSI), a 3-dB coupler, a circulator, and an optical band-pass filter.