Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1974-03-08
1976-03-16
McGraw, Vincent P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
332 751, 350 96WG, 350 96C, 350160R, 350162R, G01J 120, G02B 514, G02F 132
Patent
active
039448126
ABSTRACT:
On a substrate is formed a crystalline electrooptic thin-film waveguide, on which are deposited interdigital electrodes extending in the y-direction and spaced apart from one to another in the z-direction. To the electrodes is applied a modulating signal voltage to form in the waveguide an electrostatic field which is spatially periodic in the z-direction having an intensity proportional to the modulating signal voltage and uniform in the y-direction. Coherent light is coupled into and out of the waveguide with prism couplers. As the light propagates through the waveguide in the y-direction, it suffers a spatially periodic phase variation in the z-direction. The emerging light is accordingly diffracted into orders. The crystalline waveguide is manufactured easily and the light propagates fully through the electrostatic field.
REFERENCES:
patent: 3614198 (1971-10-01), Martin et al.
patent: 3736045 (1973-05-01), Heidrich et al.
patent: 3813142 (1974-05-01), Buhrer
Interdigital Electro-Optic ... Modulator; Polky et al; Appl Phys Lett; Vol. 21 No. 7; 1 Oct. 72; pp. 307-309.
Fast ... Modulator; Hammer et al; App Phys Lett; Vol. 23 No. 4, 15 Aug. 73; pp. 176-177.
Hattori Shuzo
Hiramatsu Tadao
Hagiwara Denki Kabushiki Kaisha
McGraw Vincent P.
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