Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-12-09
1994-11-01
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359180, 359188, H04B 1018
Patent
active
053611560
ABSTRACT:
A predistortion circuit for an optical communications system includes a main path and a predistortion path for an RF modulating signal which are independently level adjusted and impedance matched to a laser diode. The distortion path includes a distortion generator which generates a distortion signal which is substantially the same as the distortion generated by the modulation of the transmission system. The distortion path further includes an in phase adjustment leg for overall amplitude adjustment and amplitude adjustment as a function of frequency and a quadrature adjustment leg for phase adjustment as a function of frequency. Temperature compensation is provided to the adjustment networks to stabilize the gain elements of each for ambient temperature changes.
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Pascal Leslie
Powers, III Frederick W.
Scientific-Atlanta, Inc.
Stewart Steven C.
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