Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2005-10-25
2005-10-25
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C359S337000
Reexamination Certificate
active
06958857
ABSTRACT:
The present invention relates to an optical fiber component for Raman amplification having a construction for effectively suppressing deterioration of the transmission characteristic caused by amplification of scattered light components. The optical fiber component for Raman amplification has an optical fiber for Raman amplification and is inserted at a position where the effective deterioration amount of the optical SN ratio produced by DRBS-XT (Double Rayleigh Back Scattering-Crosstalk) is 1 dB or less at the signal output terminal of the optical fiber for Raman amplification.
REFERENCES:
patent: 6819477 (2004-11-01), Tsuzaki et al.
patent: 6862132 (2005-03-01), Casaccia et al.
patent: 6876489 (2005-04-01), Islam et al.
Fludger, et al. “Electrical Measurements of Multipath Interference in Distributed Raman Amplifiers” Journal of Lightwave Technology vol. 19, No. 4 (Apr., 2001) pp. 536-545.
Lewis, et al. “Characterization of Double Rayleigh Scatter Noise in Raman Amplifiers” IEEE Photonic Technology Letters vol. 12, No. 5 (May, 2000) pp. 528-530.
Hellner Mark
McDermott Will & Emery LLP
Sumitomo Electric Industries Ltd.
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