Miniature circulator devices and methods for making the same

Details Miniature circulator devices and methods for making the same Miniature circulator devices and methods for making the same

2006-01-17

2006-01-17

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Polarization without modulation

Polarization using a time invariant electric, magnetic, or...

C359S490020, C359S490020, C385S011000

Reexamination Certificate

active

06987611

ABSTRACT:
Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device includes two refraction elements arranged opposite each other along a propagation axis and coupled on opposite ends to first and second polarization orientation elements with first and second PBS elements are coupled to the first and second polarization orientation elements, respectively. The refraction elements include complementary Wollaston Prism elements or Rochon Prism elements. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, a half-wave plate formed using thin film coating techniques. The Faraday rotator elements are periodically poled in some embodiments using selective poling techniques to create oppositely oriented magnetic domains so that polarization rotations of 45° in both clockwise and counter-clockwise directions can be simultaneously achieved on the same magnetic garnet. Periodically etched half-wave plates are used in some embodiments.

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