Optical communications – Transmitter – Including compensation
Reexamination Certificate
2007-07-26
2011-11-29
Li, Shi K (Department: 2613)
Optical communications
Transmitter
Including compensation
Reexamination Certificate
active
08068746
ABSTRACT:
A method for balancing optical transmission for a first ON state and a second ON state of an electro-optic switch having an RF input port and a DC port, in one implementation, comprises the steps of associating a positive RF voltage with the first ON state of the electro-optic switch, associating a negative RF voltage with the second ON state of the electro-optic switch, wherein absolute value of the negative RF voltage associated with the second ON state is approximately equal to the positive RF voltage associated with the first ON state, and balancing optical transmission of the first ON state and the second ON state by adjusting a voltage applied to the DC port to obtain minimum optical transmission in an OFF state of the electro-optic switch.
REFERENCES:
patent: 7450288 (2008-11-01), Kikuchi
patent: 2003/0095262 (2003-05-01), Blake
patent: 0 436 344 (1991-07-01), None
patent: WO 89/11675 (1989-11-01), None
“Physics” by Halliday et al., John Wiley & Sons, 1962, pp. 708-709.
Tetsuya Kawanishi et al; Duobinary Signal Generation Using High-Extinction Ratio Modulation; Optical Fiber Communication/National Fiber Optic Engineers Conference; Feb. 24, 2008; pp. 1-3; Conference on, IEEE; Piscataway, NJ; USA.
Wichers, M. et al; Optical Duobinary Modulation Schemes Using a Mach-Zehnder Transmitter for Lightwave Systems; Transparent Optical Networks, 1999; pp. 15-18; International Conference on Kielce, Poland; Jun. 9-11, 1999; Piscataway, NJ; USA.
Carmen Patti Law Group, LLC
Li Shi K
Northrop Grumman Guidance and Electronics Company, Inc.
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