Fiber optic receiver

Details Fiber optic receiver Fiber optic receiver

1997-11-10

2000-11-28

Chan, Jason

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359194, 359195, 359189, H04B 1006

Patent

active

061543012

ABSTRACT:
The fiber optic receiver disclosed herein is adapted to receive optical signals which are digitally modulated between an "ON" state in which light is being transmitted and an "OFF" or dark state. The analog output signal of a photodetector is thresholded to obtain a binary electrical output signal and is also sampled during the binary state corresponding to the "ON" received signal. A liquid crystal element is energized as a function of the sampled amplitude thereby to establish a feedback loop driving the sampled amplitude toward a preselected level providing predictable skewing of transitions in the binary output signal.

REFERENCES:
patent: 4644145 (1987-02-01), Gundner
patent: 5015839 (1991-05-01), Tanikoshi
patent: 5132828 (1992-07-01), Conner et al.
patent: 5440654 (1995-08-01), Lambert, Jr.
patent: 5467204 (1995-11-01), Hatano et al.
patent: 5572351 (1996-11-01), Hadjifotiou
patent: 5801867 (1998-09-01), Geller et al.

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