Radiant energy – Invisible radiant energy responsive electric signalling
Reexamination Certificate
2008-05-13
2008-05-13
Porta, David P. (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Reexamination Certificate
active
07372031
ABSTRACT:
A sensitive photon detection system generates an electronic photon sensor signal as a K factor times a number N photons per unit time. The system is configured by combining a separate optical amplifier with a gain factor K1with a photo detector with a gain factor K2such that K may be realized as the product of K1and K2. The values of K1and K2are chosen to meet a predetermined K while optimizing a signal quality of the photon sensor signal. The optical amplifier may be preceded by a photon gathering device and/or a light chopping device to further optimize system performance. Further, the photon sensor signal may be further processed analog circuitry or may be digitized and processed using digital signal processing to generate an enhanced photon sensor signal with enhanced signal quality by adding gain and/or bandwidth limiting.
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Cerwin Stephen A.
Chang David B.
Porta David P.
Southwest Research Institute
Taningco Marcus H
Winstead Sechrest & Minick
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