Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2004-07-09
2008-12-30
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C359S341300
Reexamination Certificate
active
07471447
ABSTRACT:
A device and method for reducing amplified Rayleigh backscatter at a Raman pump. A pump assembly for an optical amplifier includes a set of pump radiation sources for Raman pumping an optical transmission span. Each pump radiation source is adapted to produce radiation having a pump wavelength and a pump power. The optical transmission span is adapted to provide Raman amplification of an optical data signal when pumped by the set of pump radiation sources. At least one optical isolator is selectively located between at least one selected pump radiation source and the optical transmission span to reduce amplified Rayleigh backscatter at the pump wavelength of the selected pump radiation source from feeding back into the selected at least one pump radiation source.
REFERENCES:
patent: 5241414 (1993-08-01), Giles et al.
patent: 6510000 (2003-01-01), Onaka et al.
patent: 6618195 (2003-09-01), Shieh et al.
patent: 6633712 (2003-10-01), Ramanujam et al.
patent: 6741389 (2004-05-01), Kumasako et al.
patent: 6775057 (2004-08-01), Akasaka et al.
patent: 6894831 (2005-05-01), Shieh et al.
patent: 6977769 (2005-12-01), Matsushita et al.
patent: 2002/0141698 (2002-10-01), Matsushita et al.
patent: 2003/0095323 (2003-05-01), Onaka et al.
patent: 2003/0128419 (2003-07-01), Alaruri et al.
Y. Emori, “100 nm bandwidth flat-gain Raman amplifiers pumped and gain-equalized by 12-wavelength channel WDM Diode Unit,” Electronic Letters, vol. 35, No. 16, p. 1355 (1999).
F. Koch et. al., “Broadband gain flattened Raman amplifier to extend operation in the third telecommunication window,” Optical Fiber Communication Conference, vol. 4, pp. 103-105, (2000).
P.B. Hansen, et al., High sensitivity 1.3 μm optically pre-amplified receiver using Raman amplification, Electronic Letters, vol. 32, No. 23, p. 2164-2165 (1996).
P.B. Hansen, et al., “Unrepeatered WDM transmission experiment with 8 channels of 10 Gb/s over 352 km”, IEEE Photonics Technology Letters, vol. 8, pp. 1082-1084 (1996).
S.N. Knudsen, et al., “New dispersion-slope managed fiber pairs for ultra long haul transmission systems”, Technical Proceedings of National Fiber Optic Engineers Comference, pp. 1599-1607, (2001).
S.N. Knudsen, et al, “Optimisation of dispersion compensating fibres for cabled long-haul applications”, Electronics Letters, vol. 36, No. 25, (2000).
Clark, Jr. Thomas R.
Dennis Michael L.
Dorsinville Roger
Seas Antonios A.
Shieh William
Bolda Eric
Broadwing Corporation
Thorp Reed & Armstrong LLP
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