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. 23, 1999
Filed:
Nov. 18, 1997
Applicant:
Inventor:
Jean-Pierre Laude, St-Cyr-la-Riviere par Saclas, FR;
Assignee:
Instruments S.A., Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 37 ; 385 33 ; 385 31 ; 385 15 ;
Abstract
An optic dispersing system, designed for usage in a wavelength field of a beam, includes a network or grating (1) carried by a support (2) with a dilatation coefficient .epsilon.. The system suggested is temperature-stabilized. To do so, it contains a front blade or optical element (3), or refractive index n.sub.1, transparent in the concerned wavelength field. .epsilon.+1/n.sub.1 .times.dn.sub.1 /dt is small and, advantageously, dn.sub.1 /dt and .epsilon. are of opposite signs. This device enables the manufacture of a multiplexer-demultiplexer or a fiber optic wavelength router, which is temperature-stabilized.