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:
Jun. 11, 2002
Filed:
Aug. 13, 1999
Yong Gyu Choi, Taejon, KR;
Kyong Hon Kim, Taejon, KR;
Hak Kyu Lee, Taejon, KR;
Dong Sung Lim, Taejon, KR;
Abstract
Provided are complex optical material that trivalent ytterbium ion is codoped into single crystalline, poly crystalline or amorphous material containing tetravalent chromium ion or trivalent vanadium ion as an active medium, and a using method of the material. In application of the material to solid-state lasers, optical fiber amplifiers and the likes, when excitation occurs in the 980 nm wavelength band in which absorption strongly occurs at the ytterbium ion with avoiding the wavelength range of 600˜800 nm in which the excited-state absorption occurs at the chromium ion, the energy is transferred from the ytterbium ion to the chromium ion to emit fluorescence in the range of 1200˜1600 nm wavelength. Accordingly, the present invention is to solve the problem of the excitation efficiency decrease of the tetravalent chromium ion due to the excited-state absorption and to enhance the fluorescence emission intensity.