Optical node

Details Optical node Optical node

2007-05-01

2007-05-01

Keith, Jack (Department: 3663)

Optical: systems and elements

Optical amplifier

Raman or brillouin process

Reexamination Certificate

active

11224067

ABSTRACT:
An optical node is configured to enable time-division distribution of pump light for effectively utilizing pump power. The optical node is provided with an excitation light source unit for Raman amplification, outputting Raman excitation light of a plurality of wavelengths; a control unit outputting the Raman excitation light of the plurality of wavelengths, wavelength by wavelength on a time division basis; and a Raman amplifier distributing and feeding the Raman excitation light of the plurality of wavelengths, wavelength by wavelength on a time division basis, in the opposite direction to the signal light transmission direction. In each receiving port, a period of the Raman excitation light being output wavelength by wavelength on a time division basis is set shorter than a signal light response time in the Raman amplifier to the Raman excitation light.

REFERENCES:
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patent: 2002-6349 (2002-01-01), None
patent: 2002-221742 (2002-08-01), None
Peter J. Winzer, et al., “Tuning Speed Requirements for Time-Division Multiplexed Raman Pump Lasers”, Proceedings of the 28thEuropean Conference on Optical Communication; vol. 2; Sep. 10, 2002.
C.R.S. Fludger, et al., “Novel Ultra-broadband High Performance Distributed Raman Amplifier Employing Pump Modulation”, OFC 2002, pp. 183-184, WB4.

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