Etch‐tuned ridged waveguide magneto‐optic isolator

Autor:	R. A. Lieberman, R. E. Scotti, N. Kopylov, Raymond Wolfe, V. J. Fratello
Rok vydání:	1990
Předmět:	Materials science Birefringence Physics and Astronomy (miscellaneous) business.industry Isolator Yttrium iron garnet Laser Active layer law.invention chemistry.chemical_compound symbols.namesake Optics chemistry law Etching (microfabrication) Faraday effect symbols business Waveguide
Zdroj:	Applied Physics Letters. 56:426-428
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.102778
Popis:	Isolation ratios as large as 3000 to 1 (−35 dB) at wavelengths near 1.55 μm have been measured on ridged waveguide Faraday rotation isolators. These are the best results ever reported for any waveguide isolator. Single‐mode, triple‐layer bismuth yttrium iron garnet films were chemically etched to reduce the linear birefringence of the active top layer to zero at 1.49 μm. Ion implantation enhanced etching was used to create ridges 8 μm wide and 0.5 μm high. Using fiber coupled light from a tunable color center laser, isolation ratios of −25 dB or better were achieved over a wavelength range of ±0.03 μm near 1.5 μm. A silica overlayer was used to increase the effective thickness of the active layer and raise the optimum wavelength from 1.49 to 1.55 μm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::391daa67dbf2c4674975879ea9a0a378 https://doi.org/10.1063/1.102778 Zobrazit plný text záznamu