Open AccessNoiseless electro-optic processing of optical signals generated with squeezed light
Author(s) -
Ping Koy Lam,
T. C. Ralph,
Elanor H. Huntington,
D. E. McClelland,
Hans Bachor
Publication year - 1998
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.2.000100
Subject(s) - physics , signal (programming language) , optics , noise (video) , squeezed coherent state , quantum noise , quantum limit , signal transfer function , quantum optics , signal processing , amplitude , limit (mathematics) , analog signal , acoustics , quantum , computer science , telecommunications , quantum mechanics , coherent states , mathematics , transmission (telecommunications) , mathematical analysis , radar , artificial intelligence , image (mathematics) , programming language
We demonstrate an elegant way of handling optical signals which are generated using squeezed states of light without losing their improved signal to noise ratio. We do this by amplifing, without significant noise penalty, both signal and noise away from the quantum noise limit into the classical domain. This makes the information robust to losses. Our system achieves a signal transfer coefficient, T(s), close to unity. As a demonstration we amplify a small signal carried by 35% amplitude squeezed light and show that unlike the fragile squeezed input, the signal amplified output is robust to propagation losses. A signal transfer coefficient of T(s) = 0.75 is achieved even in the presence of large introduced (86%) downstream losses.