Optical communication with two-photon coherent states--Part III: Quantum measurements realizable with photoemissive detectors
- 1 January 1980
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Information Theory
- Vol. 26 (1) , 78-92
- https://doi.org/10.1109/tit.1980.1056132
Abstract
In Part I of this three-part study it was shown that the use of two-photon coherent state (TCS) radiation may yield siginificant performance gains in free-space optical communicatinn if the receiver makes a quantum measurement of a single field quadrature. In Part II it was shown that homodyne detection achieves the same signal-to-noise ratio as the quantum field quadrature measurement, thus providing a receiver which realizes the linear modulation TCS performance gain found in Part I. Furthermore, it was shown in Part il that ff homodyne detection does exactly correspond to the field quadrature measurement, then a large binary communication performance gain is afforded by homodyne detection of antipodal TCS signals. The full equivalence of honmdyne detection and single-quadrature field measurement, as well as that of heterodyne detection and two-quadrature field measurement, is established. Furthermore, a heterodyne configuration which uses a TCS image-band oscillator in addition to the usual coherent state local oscillator is studied. This coafiguration termed TCS heterodyne detection is shown to realize all the quantum measurements described by arbitrary TCS. The foregoing results are obtained by means of a representation theorem which shows that photoemissive detection realizes the photon flux density measurement.Keywords
This publication has 17 references indexed in Scilit:
- Optical communication with two-photon coherent states--Part II: Photoemissive detection and structured receiver performanceIEEE Transactions on Information Theory, 1979
- Optical communication with two-photon coherent states--Part I: Quantum-state propagation and quantum-noiseIEEE Transactions on Information Theory, 1978
- Quantum mechanical linear filtering of vector signal processesIEEE Transactions on Information Theory, 1977
- Two-photon coherent states of the radiation fieldPhysical Review A, 1976
- Some statistical problems for quantum Gaussian statesIEEE Transactions on Information Theory, 1975
- Multiphoton optical heterodyne detectionIEEE Journal of Quantum Electronics, 1975
- Optimum testing of multiple hypotheses in quantum detection theoryIEEE Transactions on Information Theory, 1975
- Statistical decision theory for quantum systemsJournal of Multivariate Analysis, 1973
- An Image Band Interpretation of Optical Heterodyne NoiseBell System Technical Journal, 1971
- Density Operators for Coherent FieldsPhysical Review B, 1966