Holographic demultiplexing scheme using volume phase grating based on the photopolymer

A 42-channel demultiplexer using a volume holographic grating formed in photopolymer medium for dense wavelength division multiplexing (DWDM) applications is experimentally demonstrated for the first time. A 3dB bandwidth of 0.18nm and channel crosstalk of -20dB for a 50GHz channel spacing, is reported.