Optical communications – Transmitter and receiver system – Including optical waveguide
Reexamination Certificate
2002-09-17
2010-06-08
Bello, Agustin (Department: 2613)
Optical communications
Transmitter and receiver system
Including optical waveguide
C398S159000, C398S192000
Reexamination Certificate
active
07734186
ABSTRACT:
A method of reducing Raman tilt in a transmission apparatus capable of transmitting a plurality of signals, occupying contiguous channels in a transmission band, through a length of optical transmission cable which exhibits the Raman effect of transferring energy from the shorter wavelength signals at one end of the transmission band towards the longer wavelength signals at the other end of the transmission band, including the transmission of half the maximum number of signals at twice the normal channel frequency spacing at a higher-than-normal level and the transmission signals in selected ones, fewer than all, of the available channels at the normal channel spacing at a normal power level. As new channels are added at the lower frequency channel spacing, the powers of both neighboring channels are reduced to the normal power level.
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Alleston Steven
Doran Nicholas John
Stephens Marc Francis Charles
Bello Agustin
Ericsson AB
Kirschstein et al.
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