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Optical communication with two-photon coherent states. II - Photoemissive detection and structured receiver performanceIn a previous paper (1978), the authors developed a method of analyzing the performance of two-photon coherent state (TCS) systems for free-space optical communications. General theorems permitting application of classical point process results to detection and estimation of signals in arbitrary quantum states were derived. The present paper examines the general problem of photoemissive detection statistics. On the basis of the photocounting theory of Kelley and Kleiner (1964) it is shown that for arbitrary pure state illumination, the resulting photocurrent is in general a self-exciting point process. The photocount statistics for first-order coherent fields reduce to those of a special class of Markov birth processes, which the authors term single-mode birth processes. These general results are applied to the structure of TCS radiation, and it is shown that the use of TCS radiation with direct or heterodyne detection results in minimal performance increments over comparable coherent-state systems. However, significant performance advantages are offered by use of TCS radiation with homodyne detection. The abstract quantum descriptions of homodyne and heterodyne detection are derived and a synthesis procedure for obtaining quantum measurements described by arbitrary TCS is given.
Document ID
19790056046
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Shapiro, J. H.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Yuen, H. P.
(MIT Cambridge, Mass., United States)
Machado Mata, J. A.
(Instituto Universitario Politecnico, Barquisimeto, Venezuela)
Date Acquired
August 9, 2013
Publication Date
March 1, 1979
Publication Information
Publication: IEEE Transactions on Information Theory
Volume: IT-25
Subject Category
Communications And Radar
Accession Number
79A40059
Funding Number(s)
CONTRACT_GRANT: DAAB07-76-C-1400
CONTRACT_GRANT: NGL-22-009-013
Distribution Limits
Public
Copyright
Other

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