Title:
【発明の名称】光増幅器
Document Type and Number:
Japanese Patent JP3065980
Kind Code:
B2
Abstract:
An erbium-doped optical fiber for amplifying a light signal 1 is wound to form a plurality of nearly-closed rings 1a that are arranged in a flat expanded configuration. A light-receiving device 4 receives a spontaneous emission light emitted by the entirety of erbium-doped optical fiber 1 and supplies an electric signal corresponding to the received spontaneous emission light. A laser diode 2 supplies a pumping light to the erbium-doped optical fiber 1 to create a population inversion in the erbium-doped optical fiber. An output-control device 3 controls an output of laser diode 2 in response to the electric signal supplied from the light-receiving device 4. The light-receiving device 4 is located so that the light-receiving device can receive the spontaneous emission light emitted from the entirety of the rings 1a.
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Inventors:
Fukaishi Kosuke
Application Number:
JP1332398A
Publication Date:
July 17, 2000
Filing Date:
January 07, 1998
Export Citation:
Assignee:
NEC
International Classes:
H01S3/06; H01S3/067; H01S3/07; H01S3/10; H01S3/13; H01S3/17; H01S3/131; (IPC1-7): H01S3/10; H01S3/06
Domestic Patent References:
| JP6334238A | ||||
| JP6268305A | ||||
| JP4356984A | ||||
| JP6164020A | ||||
| JP75070A | ||||
| JP7123059A | ||||
| JP9107141A |
Attorney, Agent or Firm:
Shigeru Noda