Cascaded holographic polymer reflection grating filters for optical-code-division multipleaccess applications

We evaluate the use of edge-illuminated holographic Bragg filters formed in phenanthrenequinonedoped poly(methyl methacrylate) for optical-code-division multiple-access (OCDMA) coding and decoding applications. Experimental cascaded Bragg filters are formed to select two different wavelengths with a fixed distance between the gratings and are directly coupled to a fibermeasurement system. The configuration and tolerances of the cascaded gratings are shown to be practical for time-wavelength OCDMA applications.