title: Fiber-optic wavelength-division multiplexing and demultiplexing using volume holographic gratings.
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.
authors.forename: B
authors.initials: B
authors.lastname: Moslehi
authors.forename: P
authors.initials: P
authors.lastname: Harvey
authors.forename: J
authors.initials: J
authors.lastname: Ng
authors.forename: T
authors.initials: T
authors.lastname: Jannson