Fast atomic line filter

Details Fast atomic line filter Fast atomic line filter

1989-10-17

1991-01-08

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

2503361, G01J 500, G01J 508, G02B 520, G02B 522

Patent

active

049838440

ABSTRACT:
A fast atomic line filter capable of operating at speeds and quantum efficiencies greatly in excess of prior art atomic line filters. Signal light excites to an intermediate energy level the atoms of a contained vapor. A pump beam further excited these atoms to a higher Rydberg level. Simultaneously the atoms are subjected to an electric field that Stark splits the Rydberg level and ionizes very quickly the doubly excited atoms. The resulting ions or electrons are then detected with near unity quantum efficiency by a detector sensitive to either ions or electrons. By directly detecting the resulting ions or electrons the fast atomic line filter has an inherently higher quantum efficiency and much greater speed than prior art ALF's which must use photosensitive detectors to detect fluorescence.

REFERENCES:
patent: 4024396 (1977-05-01), Hill et al.
patent: 4600840 (1986-06-01), Chutjian
Tatsuo Okada et al., "Sensitive Photon Detector Based on Solution Base Ionization", Optic Let., vol. 14, No. 18, Sep. 15, 1989.

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