Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2007-12-19
2010-11-16
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
07835067
ABSTRACT:
When pump light is supplied to a transmission line fiber from a downstream station toward an upstream station and signal light from the upstream station is Raman-amplified, a corresponding intensity of amplified spontaneous scattering light is calculated from a required Raman gain by using a correlation between a Raman gain and the intensity of amplified spontaneous scattering light that occurs with Raman amplification, and further a target light intensity is calculated from the obtained intensity of the amplified spontaneous scattering light and the intensity of the amplified signal light. Then, the intensity of the pump light is controlled so that the intensity of light, which is measured by the downstream station, becomes equivalent to the target light intensity.
REFERENCES:
patent: 6388801 (2002-05-01), Sugaya et al.
patent: 6441951 (2002-08-01), Tanaka et al.
patent: 6462861 (2002-10-01), Ohshima et al.
patent: 6577437 (2003-06-01), Sugaya et al.
patent: 2002/0041431 (2002-04-01), Ohshima et al.
patent: 2002/0140927 (2002-10-01), Sobe et al.
patent: 2002/0176154 (2002-11-01), Sugaya et al.
patent: 2003/0117694 (2003-06-01), Sobe et al.
patent: 2004/0090663 (2004-05-01), Kamada et al.
patent: 2004/0160664 (2004-08-01), Sobe et al.
patent: 2004/0196158 (2004-10-01), Sugaya et al.
patent: 2005/0024712 (2005-02-01), Hiraizumi et al.
patent: 2005/0105167 (2005-05-01), Martinelli et al.
patent: 1182808 (2002-02-01), None
patent: 1522840 (2005-04-01), None
patent: 2002-296145 (2002-10-01), None
patent: 2004-172750 (2004-06-01), None
patent: 2004-287307 (2004-10-01), None
patent: 2004-361979 (2004-12-01), None
patent: 2005/013518 (2005-02-01), None
Jake Bromage, “Raman Amplification for Fiber Communications Systems”, IEEE Journal of Lightwave Technology, vol. 22, No. 1, Jan. 2004, pp. 79-93.
International Search Report (PCT/ISA/210) mailed Sep. 27, 2005 for the International Application PCT/JP2005/011298.
Supplementary European Search Report, mailed by the European Patent Office on Jan. 19, 2010, in corresponding European patent application No. 05751389.7.
Bolda Eric
Fujitsu Limited
Fujitsu Patent Center
LandOfFree
Raman amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Raman amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Raman amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4176598