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:
Nov. 05, 1991
Filed:
Sep. 24, 1990
Applicant:
Inventors:
Saburo Imamura, Mito, JP;
Tatsuo Izawa, Musashino, JP;
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; C08F / ; B32B / ; G03G / ;
U.S. Cl.
CPC ...
385131 ; 526291 ; 4284111 ; 428429 ; 430 57 ; 385143 ; 385145 ;
Abstract
A plate plastics optical waveguide includes a core portion composed of a polymer containing a deuterium atom or a halogen atom, and a clad portion which surrounds the core portion and is composed of a polymer having a refractive index lower than that of the core portion. A plastics optical waveguide having a core portion comprising a deuterated or halogenated polyacrylate or polysiloxane shows an optical loss of 0.1 dB/cm or less for light having a wavelength of 1.3 .mu.m.