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. 07, 2009
Filed:
Feb. 17, 2005
Masahiro Tsuda, Tokyo, JP;
Masahiro Tsuda, Tokyo, JP;
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Abstract
Conventional glass compositions including bismuth as a fluorescent element have a broad amplification wavelength region but do not allow the emission intensity in the 1.3-μm range to be sufficiently high through the excitation caused by light in the 0.8-μm and 0.98-μm ranges. The present invention provides a glass composition including: bismuth; a glass network former; and at least one element selected from the group consisting of dysprosium, erbium, ytterbium, neodymium, thulium, holmium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, and molybdenum (except for tetravalent titanium and trivalent iron), wherein the glass composition emits fluorescence in an infrared wavelength region, with the bismuth functioning as a fluorescent source through irradiation of excitation light. The emission intensity is increased by the sensitization effect of the at least one element.