Generating and using coherent optical radiation

Details Generating and using coherent optical radiation Generating and using coherent optical radiation

1974-12-20

1976-07-20

Libman, George H.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250211J, 250552, 331 945R, 356 23, 357 30, H01J 3912, H04B 900

Patent

active

039708390

ABSTRACT:
Optical radiation generation and detection using metal-to-metal diode junctions. Coherent optical radiation is generated by using an antenna connected to a metal-to-metal diode junction with non-linear current-voltage characteristics and by coupling to the junction electromagnetic radiation energy to interact with the junction, causing emission from the antenna at optical frequency absent from the input. Optical diodes are shown in the forms of a mechanically contacted cat whisker system and as single and multiple microscopic solid portions in an integrated solid mass, defining both the antenna and the junction, preferably as a deposit of solid layers upon a substrate, preferably as overlapping printed circuit line structures. Arrays of such junctions provide enhanced effects; useful arrays include Franklin-Marconi geometries, fish-bone antennas and row and column arrays. Such solid diode constructions and arrays thereof are used not only for optical radiation generation but also detection and mixing including use in an image scanner, energy converter and a broad band detector. The diodes as a radiation source are used in combination with an absorbtion cell in spectroscopic analysis, a feedback loop in a stable frequency source, and an optical frequency communicating system.

REFERENCES:
patent: 3229106 (1966-01-01), De Lord
patent: 3462605 (1969-08-01), Engeler
patent: 3649838 (1972-03-01), Phelan, Jr.
Hocker et al., Applied Physics Letters, vol. 12; No. 12, June 15, 1968, pp. 401,402.

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