Abstract

A novel type of multiband wavelength demultiplexer for on-chip spectroscopy applications is proposed, and first results of the device fabrication and characterization are reported. The devices are based on computer-designed digital planar holograms, which involve millions of lines specifically located and oriented in order to direct output light into designed focal channels according to the wavelength. Devices operate in four individual bandwidths within the visible range (477.2–478.0 nm, 528.8–529.9 nm, 586.4–587.7 nm, 628.9–630.4 nm) with 96 channels and spectral channel spacing down to 0.0375nm/channel.

© 2012 Optical Society of America

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