Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1983-07-07
1985-08-06
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356352, 324 96, G02B 514
Patent
active
045338299
ABSTRACT:
An optical electromagnetic radiation detector having a probe for receiving nearby electromagnetic radiation. The probe includes a loop antenna connected to a pair of transparent electrodes deposited on the end surfaces of an electro-optic Fabry-Perot interferometer. When the loop antenna picks up the presence of electromagnetic radiation, a voltage will be developed across the crystal of the electro-optic Fabry-Perot interferometer thereby changing the optical length of the interferometer. A beam of light from a remote location is transmitted through an optical fiber onto the Fabry-Perot interferometer. The change in optical length of the Fabry-Perot interferometer alters the intensity of the beam of light as it is reflected from the Fabry-Perot interferometer back through the optical fiber to the remote location. A beamsplitter directs this reflected beam of light onto an intensity detector in order to provide an output indicative of the variations in intensity. The variations in intensity are directly related to the strength of the electromagnetic radiation received by the loop antenna.
REFERENCES:
patent: 3679313 (1972-07-01), Rosenberg
patent: 4329580 (1982-05-01), Riley et al.
patent: 4356448 (1982-10-01), Brogardh et al.
patent: 4360272 (1982-11-01), Schmadel et al.
patent: 4371838 (1983-02-01), Griscom
IBM Technical Disclosure, A. W. Lohmann, Fourier-Inverse Dispersion Image Formation for Intensity, vol. 7, No. 7, Dec. 1964, p. 623.
Kersey, A. D. et al., "A Simple Fibre Fabry-Perot Sensor," Optics Communications, vol. 45, No. 2, Mar. 15, 1983, pp. 71-74.
Phelan, Jr., R. J. et al., "Subnanosecond Electrical Modulation of Light with Hydrogenated Amorphous Silicon," Appl. Phys. Lett., 38 (8), Apr. 15, 1981, pp. 596-598.
Kastal'skii, A. A., "Optical and Electrical Effects in Circuits Containing a Fabry-Perot Resonator," Sov. Phys. Semicond., vol. 7, No. 5, Nov. 1973, pp. 635-638.
Ludman Jacques E.
Miceli William J.
Brophy J. Jon
Erlich Jacob N.
Nelms David C.
Singer Donald J.
The United States of America as represented by the Secretary of
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