Multiple wavelength Sagnac interferometer

摘要

A Sagnac interferometer includes an optical signal port receiving optical signals comprising multiplexed wavelength components. A coupler splits each wavelength component into first and second portions that are coupled to an optical loop in counter-propagating directions. A plurality of phase modulators is disposed in the loop. Each phase modulator operates on wavelength component portions at one wavelength of a plurality of predetermined wavelengths.