Analysis of polarization independent Mach-Zehnder-type integrated optical isolator

Autor(en): Zhuromskyy, O
Lohmeyer, M
Bahlmann, N
Dotsch, H
Hertel, P
Popkov, AF
Stichwörter: DESIGN; Engineering; Engineering, Electrical & Electronic; integrated optics; MODE ANALYSIS; optical isolators; Optics; Telecommunications; WAVE-GUIDES
Erscheinungsdatum: 1999
Herausgeber: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Journal: JOURNAL OF LIGHTWAVE TECHNOLOGY
Volumen: 17
Ausgabe: 7
Startseite: 1200
Seitenende: 1205
Zusammenfassung: 
This paper proposes, for the first time, an integrated optical isolator independent of light polarization. A Mach-Zehnder interferometer (MZI) with two nonreciprocal phase shifters, one for transverse electric (TE) modes and another one for transverse magnetic (TM) modes can be adjusted so that it blocks the fundamental modes of the waveguides constituting the interferometer propagating in one direction and is transparent for the modes propagating in the opposite direction. If the interferometer branch waveguides are in single mode regime, the performance of the device will not depend on the polarization of incoming light. The nonreciprocal phase shifters can be realized on structures with magnetization tangential to the propagation direction. Three geometries of nonreciprocal phase shifters are discussed and tolerances are estimated.
ISSN: 07338724
DOI: 10.1109/50.774255

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