Distributed optical amplifier, amplifying method, and optical communication system

Patent 6512628 Issued on January 28, 2003. Estimated Expiration Date:

October 25, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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6188508

Raman amplifier, optical repeater, and raman amplification method
Patent #: 6292288
Issued on: 09/18/2001
Inventor: Akasaka, et al.

Method of optical signal transmission with reduced degradation by non-linear effects Patent #: 6323993
Issued on: 11/27/2001
Inventor: Hansen, et al.

Inventors

Application

No. 695187 filed on 10/25/2000

US Classes:

359/334Raman or Brillouin process

Examiners

Primary: Tarcza, Thomas H.
Assistant: Hughes, Deandra M.

Attorney, Agent or Firm

Staas & Halsey llp

Foreign Patent References

3-13836 JP 01/11/1991
6-308548 JP 04/11/1994
10-022931 JP 01/11/1998
10-073852 JP 03/11/1998

International Class

H01S 003/00

Foreign Application Priority Data

2000-03-06 JP

Abstract

A distributed optical amplifier comprises an optical amplifying medium for distributed optical amplification, light supplying means for supplying a pump light to said optical amplifying medium, a pump light detecting part for detecting optical power of said pump light, adjusting means for adjusting an incident power of the light amplified with said optical amplifying medium, and control means for adjusting incident optical power of said light according to an output of said pump light detecting means. Because of this, the present invention can be controlled with a simplified structure of an optical power of an pump light, and an optical power of light to be amplified. A distributed optical amplifier as such can, for example, be applied in optical transmission systems.

Other References

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Hansen, P.B., et al.. "Dense wavelength-division multiplexed transmission in `zero-dispersion` DSF by means of hybrid Raman/erbium-doped fiber amplifiers," Bell Labs/Lucent Technologies (OFC-99PD), pp. PD8-1-3
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