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:
Oct. 26, 1999
Filed:
Jan. 17, 1997
Tokushi Sekimura, Tokyo, JP;
Hirokazu Hayakawa, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An optical fiber amplifier is free from optical oscillation, if operated for high output power level and can be manufactured at low cost. It comprises an input optical fiber 11 for receiving signal light, a first isolator 12 for blocking any return light of the optical signal entered into the input optical fiber 11, an erbium-doped optical fiber 13 for amplifying the entered optical signal, a pumping source 14, a wavelength division multiplexer 15 for coupling the signal light and the excited light from the pumping source 14, an optical signal output optical fiber 16 connected to the wavelength division multiplexer 15 to produce an amplified optical signal, a second isolator 17 arranged on the optical signal output optical fiber 16 and a excited light input optical fiber 19 for connecting the wavelength division multiplexer 15 and the pumping source 14 and the wavelength division multiplexer 15 has a dielectric multilayer filter 18 that reflects signal light and transmits excited light.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile