CALCITE FREQUENCY SPLITTER FOR DENSE WDM TRANSMITTER

An optical frequency splitter employing Calcite crystals is demonstrat ed, to be inserted as a demultiplexer in a multimode transmitting stag e for dense WDM architectures. The device operates on the optical stat e of polarization and is designed to separate four optical channels, a pproximate to 39 GHz apart around lambda = 1.5 mu m. More than 28 dB o f rejection between channels is achieved, while keeping overall losses level below 1 dB. Theoretical calculations and experimental results a re presented.