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:
Dec. 23, 1997
Filed:
Jun. 28, 1996
Eleanor Joan Tarbox, Southampton, GB;
Pirelli General plc, , GB;
Abstract
An optical structure having two optical guidance paths between which coupling occurs in a band about one predetermined wavelength is manufactured by providing an optical structure having two optical guidance paths with respective propagation constants 12', 14' which vary differently with wavelength and coincide at one given wavelength .lambda.' arranged such that coupling occurs between said optical guidance paths in a band about said one given wavelength and subjecting the or at least one of the guidance paths which includes a radiation responsive refractive index changing dopant to radiation to change the propagation constant thereof until said one given wavelength equals said one predetermined wavelength .lambda.'.