Accession Number : AD0775888

Title :   Capacity Improvement of Optical Communication Systems via Optimal Quantum State Generation.

Descriptive Note : Final rept.,

Corporate Author : SYSTEMS CONTROL INC PALO ALTO CALIF

Personal Author(s) : Yuen,Horace P.

Report Date : 28 FEB 1974

Pagination or Media Count : 56

Abstract : In previous theories of optical communication, the freedom of quantum state generation has not been taken into account. In this work, the potential performance improvement is investigated when such freedom is included in the design of the quantum transmitter and the quantum receiver. The properties of a new class of radiation states are developed for applications to such state generation for the additive noise radiative loss channel. With state generation in the quantum receiver, it is shown that one can eliminate the quantum noise for the strongly attenuating channel. With state generation at the quantum transmitter, one can further increase the capacity to near optimal both in the classical and the quantum limit. The resulting performance gain is tremendous for typical optical parameter values, and practical means of realizing such systems should be sought. (Author)

Descriptors :   *Optical communications, *Quantum theory, Receivers, Transmitters, Quantum efficiency, Noise reduction

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE