Title :
Integrated optical isolators with sputter-deposited thin-film magnets
Author :
Levy, M. ; Osgood, R.M. ; Hegde, H. ; Cadieu, F.J. ; Wolfe, R. ; Fratello, V.J.
Author_Institution :
Microelectron. Sci. Lab., Columbia Univ., New York, NY, USA
fDate :
7/1/1996 12:00:00 AM
Abstract :
This letter describes the use of a compact sputter-deposited thin-film magnet that is directly integrated onto a waveguide isolator fabricated in magnetic thin-film garnets. Film magnets of different thicknesses are sputtered onto the waveguides, and isolation ratios of 29 dB are obtained with negligible excess loss. Stress-birefringent effects due to the ferromagnetic film overlayer are eliminated by the use of an aluminum compliant buffer.
Keywords :
garnets; integrated optics; magnetic thin film devices; magneto-optical isolators; optical fabrication; optical waveguide components; sputtered coatings; aluminum compliant buffer; fabrication; ferromagnetic film overlayer; garnets; integrated optical isolators; sputter-deposited thin-film magnets; stress birefringence; waveguide isolators; Aluminum; Garnet films; Integrated optics; Isolators; Magnetic films; Magnets; Optical buffering; Optical films; Optical waveguides; Sputtering;
Journal_Title :
Photonics Technology Letters, IEEE
