Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2003-11-26
2008-12-30
Sedighian, M. R. (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S082000, C398S043000
Reexamination Certificate
active
07471902
ABSTRACT:
An object of the invention is to provide a wavelength allocation method of signal light, which is capable of consecutively allocating signal lights efficiently on wavelength grids, while suppressing degradation in transmission characteristic due to the generation of four-wave mixed light in an optical transmission path. To this end, according to the wavelength allocation method of signal light, the consecutive allocation wavelength number of signal lights to be allocated consecutively on the wavelength grids, is set to different values according to wavelength bands, based on wavelength dependence of a generation amount of four-wave mixed light on the optical transmission path, and the signal lights are allocated consecutively on the wavelength grids in accordance with this consecutive allocation wavelength number, but the signal light is not allocated on at bas one wavelength grid adjacent to the wavelength grids on which a group or signal light are allocated consecutively.
REFERENCES:
patent: 5943151 (1999-08-01), Grasso et al.
patent: 6459515 (2002-10-01), Bergano
patent: 7039270 (2006-05-01), Poti et al.
patent: 2002/0105715 (2002-08-01), Naito et al.
patent: 2002/0114061 (2002-08-01), Naito et al.
patent: 2003/0011874 (2003-01-01), Nakamoto et al.
patent: 2002-196379 (2002-07-01), None
patent: 2002-229084 (2002-08-01), None
patent: 2003-32193 (2003-01-01), None
patent: 02/15450 (2002-02-01), None
F. Forghieri, et al., “Reduction Of Four-Wave Mixing Crosstalk In WDM Systems Using Unequally Spaced Channels,” IEEE Photon, Technol. Lett., vol. 6, pp. 754-756, Jun. 1994.
I Haxell, et al., “52×12.3 Gbit/s DWDM Transmission Over 3600km of True Wave Fiber With 100km amplifier Spans,” PD5, OAA 2000.
Xiang-Dong Cao, et al., “Ultra Long-haul DWDM Transmission Via Nonlinearity Management,” OtuC5, pp. 140-142, OAA 1999.
Bergano, et al., “320Gb/s WDM Transmission (64×5Gb/s) over 7,200km Using Large Mode Fiber Spans and Chirped Returned-to-Zero Signals,” OFC'98, postdeadline papers PD12, San Jose, USA, Feb. 1998.
European Search Report in corresponding Patent Application No. 03026929.4-2415 dated Mar. 9, 2006.
Katagiri T et al., Optical Society of America/Institute of Electrical and Electronics Engineers: “FWM Crosstalk Suppression Using Wavelength Groupimg in 25-GHz-spaced 10 Gbps-based WDM Transmission over NZ-DSF in C-band”, Optical Fiber Communication Conference, (OFC)., PostConference Digest, Atlanta, GA, Mar. 23-28, 2003, Trends in Optics and Photonics Series (TOPS), Washington, DC: OSA, U.S., vol. TOPS. vol. 86, Mar. 23, 2003, pp. 664-665.
Katagiri Toru
Miura Akira
Naito Takao
Fujitsu Limited
Sedighian M. R.
Staas & Halsey , LLP
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