<title>Four-channel multimode wavelength-division-demultiplexer (WDM) system based on surface-normal volume holographic gratings and substrate-guided waves</title>

Abstract

We demonstrate a four channel integrated wavelength division multiplexer (WDM) and demultiplexer (WDDM) based on volume holographic gratings and substrate-guided waves at near IR wavelengths. The four operating wavelengths are centered at 750, 780, 810 and 840 nm respectively. The WDM and WDDM are demonstrated using 50/125 multimode fibers. The channel-to- channel crosstalk level is measured to be less than -40 dB. The system insertion losses are -23 dB, -21 dB, -20 dB, -22 dB respectively for 750 nm, 780 nm, 810 nm and 840 nm.