Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2006-01-17
2006-01-17
Kim, Ellen E. (Department: 2874)
Optical waveguides
With optical coupler
Plural
C385S031000, C385S039000
Reexamination Certificate
active
06987903
ABSTRACT:
An optical transmission network includes a first dispersion compensator arranged in a maximum dispersion span having a maximum dispersion value and searched out from within a maximum dispersion route having a maximum dispersion value from among routes of non-regeneration intervals within which a dispersion value before dispersion compensation does not satisfy an upper limit of a dispersion tolerance, and a second dispersion compensator arranged in a maximum dispersion span having a maximum dispersion value searched out from within a maximum dispersion route having a maximum dispersion value from among the routes when a dispersion compensator is successively arranged until a route of a non-regeneration interval within which a dispersion value of a certain channel does not satisfy the dispersion tolerance does not remain any more based on the dispersion value after the dispersion compensation with respect to the searched out maximum dispersion span. The dispersion compensation amounts of the first and second dispersion compensators are such that, when the dispersion compensation amount of the maximum dispersion span in which the first and second dispersion compensators are arranged is successively increased, the span has a residual dispersion value equal to or higher than a fixed range and the maximum dispersion route which relates to the spans has a residual dispersion value which satisfies the dispersion tolerance or the span has a residual dispersion value which is within the fixed range.
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Moeser et al, “Dispersion management for randomly varying optical fibers”, Apr. 15, 2004, Optics Letters, vol. 29, No. 8, pp 821-823.
Nakajima Ichiro
Sakamoto Takeshi
Shimada Yuji
Tomofuji Hiroaki
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