Temperature-stabilized optical isolator for collimated light using (BiLuGd)_3Fe_5O_12/(BiGd)_3(FeGa)_5O_12 composite film
- 1 April 1988
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 27 (7) , 1329-1333
- https://doi.org/10.1364/ao.27.001329
Abstract
We have fabricated optical isolators whose temperature dependence of the isolation ratio has a stability of <0.2 dB using (BiLuGd)3Fe5O12/(BiGd)3(FeGa)5O12 composite film. It has been confirmed that the temperature-dependent forward loss of the isolators originates from the thermal fluctuation of the absorption peak in the films. We have also evaluated the degradation of the isolation ratio for collimated light depending on the incident angle of the collimated light, the incident position with respect to the optic axis, and the wavelength range needed for practical use.Keywords
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