Polymer optical isolator
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United States of America Patent
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Jan 17, 2017
Grant Date -
Jun 30, 2016
app pub date -
Oct 26, 2015
filing date -
Jul 1, 2008
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Abstract
Various optical isolators are disclosed. One embodiment provides an optical isolator comprising a waveguide that includes polymer magneto-optical media. In a particular embodiment, the waveguide is dimensioned for single mode operation in the selected isolation range. A cross-section of the waveguide is inhomogeneous in terms of magneto-optical materials. Polymer magneto-optical material is a part of the optical waveguide structure. The inhomogeneity induces the propagation constant shift, which is propagation-direction-dependent. An embodiment is characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves.
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