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. 20, 2001
Filed:
Jan. 13, 2000
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A plurality of pumping light sources (,) which generate pumping light having wavelengths different from each other are connected to respective input ports of an optical multiplexer via optical reflectors (,). The respective pumping light is stabilized by optical reflectors with respect to the oscillating wavelengths, and is multiplexed by an optical multiplexer (,). The multiplexed pumping light is multiplexed to signal light passing through an optical fiber (,) for amplification. In the respective optical reflectors (,) and optical multiplexer (,), the optical lines are formed of materials whose differential coefficients of changes in the center wavelengths with respect to changes in temperature in the usage wavelength band are almost the same, and the set wavelengths of the respective input ports of the optical multiplexer (,) are made almost coincident with the center wavelengths of the input side optical reflectors (,), wherein the respective optical reflectors (,) and optical multiplexer (,) are disposed in almost the same environmental temperature atmosphere. Therefore, it is possible to always make coincident the center wavelength of the optical reflectors and that of the input ports of an optical ports of an optical multiplexer corresponding thereto regardless of changes in temperature without compensating for the temperature.