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:
Apr. 10, 2001
Filed:
Feb. 11, 1999
Applicant:
Inventors:
Kiyoshi Nagai, Tokyo, JP;
Yukihiro Ozeki, Tokyo, JP;
Assignee:
OKI Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/00 ;
U.S. Cl.
CPC ...
G02B 6/00 ;
Abstract
An optical delay time adjuster and an optical time-division multiplexer. The delay time adjuster includes a support, an optical fiber attached to the support, and a device attached to the support which adjustably changes the length of the optical fiber. In various embodiments the device is an electric heater or cooling device or provides current to a piezoelectric element serving as the support. The optical time-division multiplexer includes an optical coupler which multiplexes optical signals received at its input ports, and the optical delay time adjuster connected to one of the input ports of the coupler.