NASA NTRS · 19960017880
Parametric Amplification For Detecting Weak Optical Signals
Abstract
Optical-communication receivers of proposed type implement high-sensitivity scheme of optical parametric amplification followed by direct detection for reception of extremely weak signals. Incorporates both optical parametric amplification and direct detection into optimized design enhancing effective signal-to-noise ratios during reception in photon-starved (photon-counting) regime. Eliminates need for complexity of heterodyne detection scheme and partly overcomes limitations imposed on older direct-detection schemes by noise generated in receivers and by limits on quantum efficiencies of photodetectors.
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Hemmati, Hamid, Chen, Chien, Chakravarthi, Prakash. 1996-02-01. Parametric Amplification For Detecting Weak Optical Signals. https://ntrs.nasa.gov/citations/19960017880
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