Mach Zehnder Interferometer and its Applications {tag} {/tag} IJCA Proceedings on National Seminar on Recent Advances in Wireless Networks and Communications © 2014 by IJCA Journal NWNC - Number 1 Year of Publication: 2014 Authors: Rekha Mehra Heena Shahani Aslam Khan {bibtex}nwnc1412.bib{/bibtex} Abstract This paper describes the design of Mach Zehnder Interferometer and reviews its applications in emerging optical communication networks. Mach Zehnder Interferometer is basically used to measure relative phase shift between two collimated beams from a coherent light source. Using this basic principle a number of devices can be designed, few of these such as optical sensors, all-optical switches, optical add-drop multiplexer and modulator are discussed in this 1 / 4