The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 1976
Filed:
Mar. 08, 1974
Shuzo Hattori, Nagoya, JA;
Tadao Hiramatsu, Nagoya, JA;
Hagiwara Denki Kabushiki Kaisha, Nagoya, JA;
Abstract
On a substrate is formed a crystalline electrooptic thin-film waveguide, on which are deposited interdigital electrodes extending in the y-direction and spaced apart from one to another in the z-direction. To the electrodes is applied a modulating signal voltage to form in the waveguide an electrostatic field which is spatially periodic in the z-direction having an intensity proportional to the modulating signal voltage and uniform in the y-direction. Coherent light is coupled into and out of the waveguide with prism couplers. As the light propagates through the waveguide in the y-direction, it suffers a spatially periodic phase variation in the z-direction. The emerging light is accordingly diffracted into orders. The crystalline waveguide is manufactured easily and the light propagates fully through the electrostatic field.