Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1996-03-12
1997-11-11
Hellner, Mark
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359194, 385 2, H01B 1006, G02F 103
Patent
active
056870183
ABSTRACT:
A received system for receiving an input signal from an antenna includes a receiving device, and a signal transmitting system for transmitting the input signal as an optical beam signal, the signal transmitting system including a laser for irradiating a laser beam; an optical modulator for receiving the laser beam and the input signal with an input signal intensity and an input amplitude to produce a modulated beam having a beam intensity which is varied in response to the input amplitude and the input signal intensity; a photoelectric converter for converting the modulated beam from the optical modulator into an electric signal having a converted amplitude, the receiving device receiving and processing the electric signal as the input signal; a feedback control device for receiving the electric signal to produce a feedback control signal; and a laser control device for controlling the laser to adjust a beam intensity of the laser beam in response to the feedback control signal so that the converted amplitude is approximately equal to a constant amplitude regardless of variation of the input amplitude.
REFERENCES:
patent: 4887900 (1989-12-01), Hall
patent: 5080505 (1992-01-01), Epworth
patent: 5225922 (1993-07-01), Chraplyvy et al.
patent: 5227908 (1993-07-01), Henmi
patent: 5287212 (1994-02-01), Cox et al.
Hellner Mark
Tokin Corporation
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