Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1995-04-27
1998-04-14
Bacares, Rafael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359161, 359181, H04B 1012
Patent
active
057399360
ABSTRACT:
An electro optical circuit for transmitting an information bearing signal, such as a signal in the RF, AF or microwave frequency domains, to a predetermined location includes a laser for generating coherent light to be used as a carrier, and an electro optical modulator for receiving the information signal and the coherent light and generating first and second modulated light signals which respectively comprise the coherent light modulated by the information signal and the coherent light modulated by the inversion of the information signal. The first and second modulated light signals are supplied to a detector at the predetermined location through separate optical paths. The detector converts the first modulated light signal into a first DC component, representing the laser-generated coherent light, and into a first information component representing the information signal, and converts the second modulated light signal into a second DC component which also represents the laser-generated coherent light, and into a second information component representing the inversion of the information signal and which is thus in an anti-phase relationship with the first information component. The detector combines the first and second DC current components so that they mutually nullify each another.
REFERENCES:
patent: 3968361 (1976-07-01), Bumgardner
patent: 4393518 (1983-07-01), Briley
patent: 5105293 (1992-04-01), Bortolini
patent: 5126871 (1992-06-01), Jeffers
patent: 5267072 (1993-11-01), Maleki
patent: 5444740 (1995-08-01), Mizukami et al.
patent: 5510922 (1996-04-01), Naito
Roemer Peter Bernard
Watkins Ronald Dean
Yakymyshyn Christopher Paul
Bacares Rafael
General Electric Company
Snyder Marvin
Stoner Douglas E.
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