Title:
AN OPTICAL TRANSMISSION SYSTEM AND THE AMPLIFY METHOD
Document Type and Number:
WIPO Patent Application WO/2006/029569
Kind Code:
A1
Abstract:
An optical transmission system comprises an optical transmitter, an optical power amplifier, an optical preamplifier and an optical receiver which are connected by an optical fiber in turn. The system also comprises a remote pumping amplifier connecting with the optical power amplifier and the optical preamplifier in series, a remote pumping unit connecting with the optical fiber provided between the optical power amplifier and the optical preamplifier, which supplies the remote pumping light to the remote pumping amplifier, so that the light signal in the remote pumping amplify unit is amplified, and the Raman pumping unit connecting with the optical fiber provided between the optical power amplifier and the optical preamplifier, which provides the Raman light. The system can extend the repeaterless distance. For the system with the repeaters, the system can also reduce the number of the repeaters.
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Inventors:
ZHANG DEJIANG (CN)
Application Number:
PCT/CN2005/001469
Publication Date:
March 23, 2006
Filing Date:
September 13, 2005
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
ZHANG DEJIANG (CN)
ZHANG DEJIANG (CN)
International Classes:
H04B10/291; H04B10/293; (IPC1-7): H04B10/12; H04B10/17; H01S3/10
Foreign References:
| CN1501597A | 2004-06-02 | |||
| US6711359B1 | 2004-03-23 | |||
| US6263139B1 | 2001-07-17 | |||
| US6081366A | 2000-06-27 | |||
| FR2745395A1 | 1997-08-29 |
Other References:
T. TAKAHASHI ET AL.: "Performance prospects of long span, large capacity submarine repeaterless transmission systems", GLOBAL TELECOMMUNICATIONS CONFERENCE, vol. 2, 18 November 1996 (1996-11-18), pages 928 - 932
O. GAUTHERON ET AL.: "407-KM, 2.5-GBIT/S REPEATERLESS TRANSMISSION USING AN ELECTROABSORPTION MODULATOR AND REMOTELY RUMPED ERBIUM-DOPED FIBER POST-AND DPRE-AMPLIFIERS", IEEE PHOTONICS TECHNOLOGY LETTERS, IEEE SERVICE CENTER, PISCATAWAY, vol. 7, no. 3, 1 March 1995 (1995-03-01), pages 333 - 335
O. GAUTHERON ET AL.: "407-KM, 2.5-GBIT/S REPEATERLESS TRANSMISSION USING AN ELECTROABSORPTION MODULATOR AND REMOTELY RUMPED ERBIUM-DOPED FIBER POST-AND DPRE-AMPLIFIERS", IEEE PHOTONICS TECHNOLOGY LETTERS, IEEE SERVICE CENTER, PISCATAWAY, vol. 7, no. 3, 1 March 1995 (1995-03-01), pages 333 - 335
Attorney, Agent or Firm:
Unitalen, Attorneys Law AT. (Scitech Place No.22, Jian Guo Men Wai Avenu, Chaoyang District Beijing 4, CN)
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