Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2005-06-07
2005-06-07
Tarcza, Thomas H. (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
06903863
ABSTRACT:
Raman amplification of a WDM signal with excellent gain flatness across a very large bandwidth is achieved. Co-propagating and counter-propagating Raman pumping are combined in the same fiber. Multiple pumping wavelengths are employed. Wavelengths employed for co-propagating pumping and wavelengths employed for counter-propagating pumping alternate in order of wavelength. In one embodiment, N co-propagating pump wavelengths and N+1 counter-propagating pump wavelengths are used. Alternatively, one may use N+1 co-propagating pump wavelengths and N counter-propagating pump wavelengths.
REFERENCES:
patent: 6181464 (2001-01-01), Kidorf et al.
patent: 6191877 (2001-02-01), Chraplyvy et al.
patent: 6292288 (2001-09-01), Akasaka et al.
patent: 6344922 (2002-02-01), Grubb et al.
patent: 6356383 (2002-03-01), Cornwell et al.
patent: 6384962 (2002-05-01), Foursa et al.
patent: 6384963 (2002-05-01), Ackerman et al.
patent: 2002/0021864 (2002-02-01), Emori et al.
patent: 2002/0149838 (2002-10-01), Wang et al.
patent: 2002/0163712 (2002-11-01), Hamoir
Namiki et al. “Ultrabroad-Band Raman Amplifiers Pumped and Gain-Equalized by Wavelength-Division-Multiplexed High-Powe Laser Diodes.” IEEE J. Selected Topics in Quantum Electronics, 7:1, Jan./Feb. 2001, pp. 3-16.
T. Tanaka et al., “Gain-Flattened Raman Amplification Scheme for WDM Transmission”, OAA' 2001 Stresa, Italy, paper OtuA3.
H. Suzuki et al., “1-Tb/s (100×10 Gb/s) Super-Dense WDM Transmission with 25 GHz Channel Spacing in the Zero-Dispersion Region Employing Distributed Raman Amplification Technology”, IEEE Photonics Technology Letters, vol. 2, No. 7, Jul. 2000.
M. Nissov et al., “Rayleigh Crosstalk in Long Cascades of Distributed Unsaturated Raman Amplifiers”, Electronics Letters, 10thJun. 1999, vol. 35, No. 12, pp. 997-998.
Braverman Ada Livia
Carniel Federico
Di Pasquale Fabrizio
Cisco Technology Inc.
Hughes Deandra M.
Ritter Lang & Kaplan LLP
Tarcza Thomas H.
LandOfFree
Gain flattened bi-directionally pumped Raman amplifier for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gain flattened bi-directionally pumped Raman amplifier for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gain flattened bi-directionally pumped Raman amplifier for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3483389