Method and apparatus for controlling Raman amplification...

Optical: systems and elements – Optical amplifier – Raman or brillouin process

Reexamination Certificate

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Reexamination Certificate

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06844961

ABSTRACT:
In an Raman amplification control apparatus, a plurality of excitation light pulses respectively having a plurality of different wavelengths are generated; and the plurality of excitation light pulses are injected into a predetermined optical transmission line in turn at such timings that the plurality of excitation light pulses do not overlap even after propagation of a predetermined effective length of the predetermined optical transmission line. In addition, the plurality of excitation light pulses may be injected into the predetermined optical transmission line in such an order that the difference between propagation velocities (or wavelengths) of each pair of ones of the plurality of excitation light pulses successively injected into the predetermined optical transmission line is minimized.

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patent: 20030081307 (2003-05-01), Fludger et al.
patent: WO 9211561 (1992-07-01), None
Marshall et al. Novel Delayed Pulse Techniques for Stimulated Raman Scattering. IEEE Journal of Quantum Electronics, vol. 29, No. 2, Feb. 1993. pp. 515-524.*
Fludger et al. Novel Ultra-Broadband High Performance Distributed Raman Amplification Employing Pump Modulation. OFC 2002. Mar. 17-22, 2002. pp. 183-184.*
Japanese Abstract No. 2000-314902 A, dated Nov. 14, 2000. Translated.
Japanese Abstract No. 05-288681 A, dated Nov. 2, 1993. Translated.
Japanese Abstract No. 60-066494 A, dated Apr. 16, 1985. Translated.

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