Nonreciprocal phase shift of TE modes induced by a compensation wall in a magneto–optic rib waveguide

Autor:	A. M. Alekseev, D. Träger, Horst Dötsch, L. Wilkens, A. F. Popkov
Rok vydání:	2001
Předmět:	Materials science Physics and Astronomy (miscellaneous) Optical isolator business.industry Gadolinium gallium garnet Rib waveguides Epitaxy Waveguide (optics) law.invention Compensation (engineering) chemistry.chemical_compound Wavelength Optics chemistry law business Magneto
Zdroj:	Applied Physics Letters. 79:4292-4294
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1428633
Popis:	Garnet films of composition (Gd, Bi)3(Fe, Ga)5O12 are grown by liquid–phase epitaxy on (111) oriented substrates of gadolinium gallium garnet. The films are close to compensation. Using laser annealing straight vertical compensation walls (CW) are generated. Monomode rib waveguides are fabricated by ion beam etching so that a CW is located close to a rib center. The CW induces a nonreciprocal phase shift of the TE0 mode. The dependence of this phase shift on the position of the CW within the rib is calculated. Experimentally a phase shift of 0.7 cm−1 at 1.3 μm wavelength is observed. The deviation from the theoretical value is discussed. Such waveguides are essential to realize polarization–independent optical isolators.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f98678a17a5a226ab40e9f7f72f54b6a https://doi.org/10.1063/1.1428633 Zobrazit plný text záznamu