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:
Feb. 25, 1986
Filed:
Feb. 10, 1984
Kiyofumi Mochizuki, Tokyo, JP;
Yoshinori Namihira, Kanagawa, JP;
Kokusai Denshin Denwa Co., Ltd., Tokyo, JP;
Abstract
An optical de-polarizer is implemented by using an optical fiber, and/or a beam splitter coupled with output of said optical fiber. An optical fiber is longer than a predetermined length so that equation .vertline.t.sub.1 -t.sub.2 .vertline.>t.sub.c is satified where t.sub.1 is polarization mode dispersion in a first optical fiber, t.sub.2 is a polarization mode dispersion in a second optical fiber which is coupled with output of the first optical fiber, and t.sub.c is coherence time of a beam defined by an optical source. According to the present invention, one of the conditions (1) an angle between polarization axis of the first optical fiber and polarization axis of the second optical fiber is 45.degree., and (2) an angle between polarization axis of the optical fiber and polarization axis of the beam splitter is 45.degree., is satisfied.