THIN-FILM OPTICAL CIRCUIT DEVICES

专利名称：THIN-FILM OPTICAL CIRCUIT DEVICES
发明人：STUART LAWRENCE BLANK,ROY CONWAY LECRAW,HYMAN JOSEPH LEVINSTEIN,PING
KING TIEN,LAWRENCE JOHN VARNERIN,
JR.,STUART HARRY WEMPLE,RAYMOND
WOLFE
申请号：AU5158473
申请日：19730130
公开号：AU5158473A
公开日：
19740801
专利内容由知识产权出版社提供
摘要：Thin-film optical waveguides are disclosed comprising single-crystal rare-earth garnet films deposited on garnet substrates. Epitaxial film growth techniques, developed largely for magnetic bubble domain devices, provide films with superior optical properties either at visible or near-visible wavelengths. The thin-film optical waveguides are comprised of transparent garnet films of the general formula R3B5O12; where R can be yttrium, lanthanum, bismuth, or a rare-earth ion with an atomic number of 60 to 71 inclusive, and B an be either magnetic, i.e., iron, or nommagnetic, i.e., gallium or aluminum. The use of the former types of films can give rise to various thin-film magnetic devices suitable for integrated optical circuit arrangements. One such device which is disclosed, a thin-film magneto-optical switch and modulator, includes a light-guiding film of an iron garnet composition and a serpentine micro-circuit which is deposited on the film to carry a switching current. The device provides a continuous switching of the polarization modes of the light waves guided in the film. Similarly, by applying a microwave current to the
same circuit, the guided light can be modulated.
申请人：WESTERN ELECTRIC CO., INC.
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