An all-fiber dense wavelength-division multiplexer/demultiplexer using photoimprinted Bragg gratings

摘要

A wavelength multiplexing/demultiplexing device is fabricated and used to drop/insert a single wavelength channel from/into a multiple wavelength transmission link with 100 GHz channel-spacing at 1550 nm. The device consists of an all-fiber Mach-Zehnder interferometer with photoinduced Bragg gratings. The following performances were measured: extraction/coupling efficiency =99.4%, excess loss >0.5 dB, adjacent channel-isolation <20 dB, and return loss <23 dB.