Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2006-02-07
2006-02-07
Lee, John D. (Department: 2874)
Optical waveguides
With optical coupler
Plural
C398S083000
Reexamination Certificate
active
06996307
ABSTRACT:
A variable bandwidth hierarchical OADM apparatus and method handles different data rates, based on a waveband OADM and one or more wavelength OADMs in parallel. The wavelength OADM combines multiple adjacent channels with fine granularity up to the bandwidth of the waveband OADM. The wavebands and wavelengths to be passed, dropped, and added by the hierarchical OADM apparatus are all electronically selectable, hence no hardware modification is needed when the data rate is changed. The use of a coarse granularity waveband OADM and variable-bandwidth wavelength OADM with fine granularity enables our hierarchical OADM apparatus and method to provide a variable-bandwidth multi-granularity add/drop capability.
REFERENCES:
patent: 2003/0002104 (2003-01-01), Caroli et al.
patent: 2004/0208548 (2004-10-01), Gruber et al.
patent: 2004/0247239 (2004-12-01), Eldada
L. Noirie et al , “Multi-Granularity Optical Cross-Connect,” in Proc ECOC 2000, paper 9.2.4.
M. Vasilyev et al, “‘Broadcast and Select’ OADM in 80×10.7 Gb/s Ultra-Longhaul Network,” IEEE Photonics Tech. Letters, vol. 15, No. 2, pp 332-334, Feb. 2003.
Chandrasekhar Sethumadhavan
Doerr Christopher Richard
Su Yikai
Lee John D.
Lucent Technologies - Inc.
Wong Tina M
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