Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2005-09-02
2009-11-03
Vanderpuye, Ken N (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S043000, C398S068000, C398S082000, C398S085000, C398S140000, C398S158000, C380S255000, C380S256000
Reexamination Certificate
active
07613396
ABSTRACT:
In a system where a quantum channel and a classical channel are multiplexed on a single optical transmission line and information is transmitted from a transmitter to a receiver through the quantum channel, the classical channel is inhibited from affecting the quantum channel. To this end, the transmission characteristics of a transmitter-side wavelength multiplexer/demultiplexer for the classical channel, the transmission characteristics of a receiver-side wavelength multiplexer/demultiplexer for the quantum channel, and the optical power of a light source for the classical channel are designed so that crosstalk light due to spontaneous emission light and crosstalk light due to nonlinear optical effects can be suppressed, and the classical channel does not affect the quantum channel.
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Maeda Wakako
Tajima Akio
Tanaka Akihiro
Dobson Daniel G
NEC Corporation
Sughrue & Mion, PLLC
Vanderpuye Ken N
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