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IEICE TRANSACTIONS on Communications

An Optical Receiver Overcome the Standard Quantum Limit

Tsuyoshi SASAKI, Osamu HIROTA

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Summary :

A study on the limitation of optical communication systems has received much attention. A method to overcome the standard quantum limit is to apply non-standard quantum state, especially squeezed state. However, the advantage of the non-standard quantum state is degraded by the transmission energy loss. To cope with this problem, we have proposed a concept of the received quantum state control (RQSC), but the realization has some difficulties. In this paper, we propose a new system to realize the received quantum state control system, employing injection locked laser (ILL) system. Then we show that our new system can overcome the standard quantum limit.

Publication
IEICE TRANSACTIONS on Communications Vol.E75-B No.6 pp.514-520
Publication Date
1992/06/25
Publicized
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Type of Manuscript
Special Section PAPER (Special Issue on Communication Theory)
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