All-fiber mach-zehnder interferometer for dwdm-pon bidirectional multiplexing

Abstract

Next generation optical access networks (FTTH, Fiber-to-the-Home), use wavelength division multiplexing (WDM) to highly increase the communication capacity to/from the users. A key issue in these networks is to split/combine the lights to/from the users at different wavelengths with the minimum losses, in a single fiber bidirectionaly.