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Applied Optics

Applied Optics


  • Vol. 38, Iss. 27 — Sep. 20, 1999
  • pp: 5747–5751

Reduction of the temperature dependence of the nonreciprocal effect of magneto-optic channel waveguides

Norbert Bahlmann, Michael Wallenhorst, Ludger Wilkens, Volker Backherms, Andree Josef, Peter Hertel, and Horst Dötsch  »View Author Affiliations

Applied Optics, Vol. 38, Issue 27, pp. 5747-5751 (1999)

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The nonreciprocal effect is the difference Δβ = βforward - βbackward between forward and backward-propagation constants of optical modes. This effect is analyzed for the fundamental TM00 mode of channel waveguides in epitaxially grown magnetic garnet films. To increase |Δβ|, double layers with opposite signs of Faraday rotation are used to prepare the waveguides. It is shown that the temperature dependence of Δβ can be reduced considerably if the layer with positive Faraday rotation, which is at room temperature close to the Curie point, is replaced by a paramagnetic layer with negligible Faraday rotation. Concurrently, however, |Δβ| is decreased by ∼35% at 295 K.

© 1999 Optical Society of America

OCIS Codes
(130.3130) Integrated optics : Integrated optics materials
(160.3820) Materials : Magneto-optical materials
(230.3240) Optical devices : Isolators
(230.3810) Optical devices : Magneto-optic systems
(230.7380) Optical devices : Waveguides, channeled

Original Manuscript: April 21, 1999
Revised Manuscript: June 29, 1999
Published: September 20, 1999

Norbert Bahlmann, Michael Wallenhorst, Ludger Wilkens, Volker Backherms, Andree Josef, Peter Hertel, and Horst Dötsch, "Reduction of the temperature dependence of the nonreciprocal effect of magneto-optic channel waveguides," Appl. Opt. 38, 5747-5751 (1999)

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