Optical communications – Transmitter and receiver system – Including polarization
Reexamination Certificate
2007-12-11
2007-12-11
Bello, Agustin (Department: 2613)
Optical communications
Transmitter and receiver system
Including polarization
C398S184000, C398S195000
Reexamination Certificate
active
10849298
ABSTRACT:
In the invention, an input light including a signal light and a noise light within a signal wavelength band of the signal light is divided into a first component with a polarization parallel to a polarization direction of the signal light and a second component with a polarization orthogonal to the polarization direction of the first component. The first component is supplied into a first arm and the second component into a second arm. The optical phase of the second component in the second arm is shifted so that the optical phase of the second component in the second arm relatively differs by π from the optical phase of the first component in the first arm. The first component output from the first arm and the second component output from the second arm are combined to make the noise lights included in the first and second components interfere with each other.
REFERENCES:
patent: 6493473 (2002-12-01), Wooten
patent: 6678431 (2004-01-01), Han et al.
Ooi, et al., “40-Gb/s WDM Transmission With Virtually Imaged Phased Array (VIPA) Variable Dispersion Compensators” Journal of Lightwave Technology, vol. 20, No. 12, Dec. 2002, pp. 2196-2203.
Hayashi Michiaki
Tanaka Hideaki
Bello Agustin
Christie Parker & Hale LLP
KDDI Corporation
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