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:
Jan. 30, 1990
Filed:
Feb. 21, 1989
Applicant:
Inventors:
Nicholas R Dono, Hopewell Junction, NY (US);
Paul E Green, Jr, Mount Kisco, NY (US);
Philippe A Perrier, Viroslay, FR;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; G02F / ; G01B / ;
U.S. Cl.
CPC ...
350355 ; 3503 / ; 350163 ; 350317 ; 356352 ;
Abstract
A tunable optical filter having a number cascaded resonator cavities with each cavity having electro-optic material in its interior. The resonator cavities will resonate at a select wavelength when the index of refraction of the electro-optic material is changed to a predetermined value in response to only a single control voltage. The index of refraction of the electro-optic material is adjusted to a predetermined value by application of the single control voltage to one of a pair of electrodes which are on opposite sides of the resonator cavities.