Optical Add/drop Multiplexing Performed Using Broadband Transmission Filters and a Narrowband Reflection Filter

Abstract — We propose and demonstrate the concept of an optical add/drop multiplexing (OADM) device utilising a pair of broadband transmission filters and a narrowband reflection filter. Numerical simulations are used to illustrate transmission filter performance using the classical grating analysis approach, and a discrete inverse scattering grating synthesis technique. We also investigate the power coupling in a cladding-mode coupler device using different chemical compounds as a coupling medium between optical fibres. Index Terms — Add/drop multiplexing, transmission filters, grating analysis, grating synthesis, cladding-mode coupler. I