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. 10, 1987
Filed:
Oct. 28, 1982
Applicant:
Inventor:
Hideo Segawa, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9613 ; 350 9614 ;
Abstract
An optical switch array including a substrate in the main surface of which is formed a plurality of inlet waveguides arranged side-by-side with a predetermined pitch and a like plurality of outlet waveguides each arranged in line with the corresponding inlet waveguide with a gap therebetween is provided. The gap is filled with a material having a temperature dependent index of refraction, which is lower in value than the waveguides at normal temperature but becomes comparable in value to the waveguide when heated thereby optically coupling the paired inlet and outlet waveguides.