Abstract

We present theoretical and experimental results of a novel fiber-optic wavelength-division multiplexing (WDM) design employing a broadband (>150-nm) dichromated gelatin volume holographic grating operating in a reflective Littrow configuration with on-axis optics, a single lens, and one fiber array. This configuration can achieve better than −1.5-dB insertion loss and −40-dB cross talk for a 6-channel system and −2.5-dB insertion loss and −20-dB cross talk for a 12-channel system with 15-nm channel spacing. For an experimental 4-channel WDM unit we measured better than −1.5-dB insertion loss for all channels and less than −32-dB cross talk. This design can provide cost and performance benefits for local area network communication applications.

© 1989 Optical Society of America

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