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Integrated optical isolators with sputter-deposited thin-film magnets

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6 Author(s)
Levy, M. ; Microelectron. Sci. Lab., Columbia Univ., New York, NY, USA ; Osgood, R.M. ; Hegde, H. ; Cadieu, F.J.
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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.

Published in:

Photonics Technology Letters, IEEE  (Volume:8 ,  Issue: 7 )

Date of Publication:

July 1996

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