Title :
QPSK receiver outperforming the standard quantum limit for any signal power
Author :
Muller, Christian R. ; Leuchs, Gerd ; Marquardt, Christoph
Author_Institution :
Max Planck Inst. for the Sci. of Light, Erlangen, Germany
Abstract :
We present a quantum receiver for the discrimination of quadrature phase-shift keyed signals that approaches the Helstrom bound for any signal power. The discrimination is performed via adaptive displacements prior to a single photon detector.
Keywords :
optical receivers; photon counting; quadrature phase shift keying; Helstrom hound; QPSK receiver; adaptive displacements; quadrature phase-shift keyed signals; quantum receiver; signal power; single photon detector; standard quantum limit; Adaptive optics; Detectors; Error probability; Phase shift keying; Photonics; Receivers; Standards;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
