Grating-assisted Mach-Zehnder OADM using cladding-photosensitive fibre for cladding mode suppression

We report the realization and performances of an OADM using a grating-assisted Mach-Zehnder interferometer made of cladding-photosensitive fiber. This component provides low-cladding-mode coupling (0.6 dB for 36 dB apodized grating isolation) and a high return loss up to 30 dB