Integrated optical circulator based on radiatively coupled magneto-optic waveguides

Autor(en): Lohmeyer, M
Shamonin, M
Hertel, P
Stichwörter: DESIGN; integrated optics; IRON-GARNET; magneto-optic circulator; magneto-optic isolator; NONRECIPROCAL PHASE-SHIFT; Optics; radiatively coupled waveguides; three-guide coupler
Erscheinungsdatum: 1997
Herausgeber: SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
Journal: OPTICAL ENGINEERING
Volumen: 36
Ausgabe: 3
Startseite: 889
Seitenende: 895
Zusammenfassung: 
In a three-guide coupler with multimode central waveguide, more than two modes of the entire structure participate in the coupling between the outer waveguides. Using a three-mode approximation we found simple conditions for complete power transfer between the outer waveguides: the device length has to match certain multiples of the conventionally defined coupling length. The specific form of the relevant modes allows us to design a magneto-optic isolator or circulator with significantly reduced device length (as compared to the conventional nonreciprocal coupler). The performance of the proposed devices is simulated by propagating-mode calculations. Estimates for admissible fabrication tolerances for the layer thicknesses are presented. (C) 1997 Society of Photo-Optical Instrumentation Engineers.
ISSN: 00913286
DOI: 10.1117/1.601255

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