Holographic Optical Filters and Cross-talk Performance in WDM Networks

Techniques for design and implementation of passive broadcast star couplers using holographic devices have been reported. These devices whose refractive index varies in space, have also the capability of multiplexing and demultiplexing optical signals in WDM systems. In this paper, we investigate the wavelength sensitivity of such devices for optical filtering. Specifically, we will examine their power transmittance function. We then present the cross-talk performance in multi-channel WDM-OOK systems. The filter performance is compared with that of a Fabry-Perot filter (F.P.).