title: Coupling-induced phase shift in a microring-coupled Mach-Zehnder interferometer.
abstract: We experimentally study the effects of the coupling-induced phase shift (CIPS) in silicon-on-insulator microring-coupled Mach-Zehnder interferometer (MZI) devices for the flat-top filter application. Excellent agreement is obtained between the theoretical modeling and the experiment. It is demonstrated that width offset of the uncoupled MZI arm can compensate the CIPS and approximate a box-like filter with only 0.02% deviation from its ideal requirement.
authors.affiliation: Photonics Research Centre and Nanophotonics Laboratory, School of Electrical and Electronic Engineering,Nanyang Technological University, Singapore 639798, Singapore.
authors.forename: S
authors.initials: S
authors.lastname: Darmawan
authors.forename: Landobasa Y M
authors.initials: LY
authors.lastname: Tobing
authors.forename: T
authors.initials: T
authors.lastname: Mei
mesh_terms: D007368:Interferometry / Q000295:instrumentation* / Q000379:methods