Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2005-11-29
2005-11-29
Font, Frank G. (Department: 2883)
Optical communications
Multiplex
Wavelength division or frequency division
C398S157000, C385S123000, C359S334000, C359S341310
Reexamination Certificate
active
06970650
ABSTRACT:
In a one-fiber bidirectional optical transmission system in which output optical signals of optical transmitter-receivers respectively connected to the opposite ends of one optical fiber transmission line are bidirectionally transmitted in the optical fiber transmission line, which utilizes a Raman amplification effect by backward pumping, a frequency satisfying the conditions of |fs1−f0|≠|fp2−f0| and |fs2−f0|≠|fp1−f0| is selected, where f0is a zero dispersion frequency of the optical fiber transmission line, fs1and fs2are the frequencies of the first signal and the second signal, respectively, and fp1and fp2are frequencies of the first Raman pump light and the second Raman pump light, respectively.
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Kajiya Satoshi
Kinjo Kaoru
Mizuochi Takashi
Birch, Stewart Kolasch & Birch, LLC
Dupuis Derek L.
Font Frank G.
Mitsubishi Denki & Kabushiki Kaisha
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