Abstract

The design and demonstration of a holographic optical demultiplexer based on cascaded volume holographic gratings are presented. By serially adding a second holographic grating, which has a different grating period, slant angle, and center wavelength compared with those of the first grating, the operating wavelength range of the optical demultiplexer could be expanded, and, therefore, the number of channels of the holographic demultiplexer is doubled. As a result of the experiment, a 0.4nm spaced 130- channel demultiplexer with a channel uniformity of 3 .5  dB, a 3  dB bandwidth of 0 .12  nm, and channel cross talk of 20dB is experimentally achieved.

© 2006 Optical Society of America

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