A Quantum Study of Multibit Phase Coding for Optical Storage

Date

2006

Authors

Hsu, Magnus
Delaubert, V.
Bowen, Warwick
Fabre, Claude
Bachor, Hans
Lam, Ping Koy

Journal Title

Journal ISSN

Volume Title

Publisher

Institute of Electrical and Electronics Engineers (IEEE Inc)

Abstract

We propose a scheme which encodes information in both the longitudinal and spatial transverse phases of a continuous-wave optical beam. A split detector-based interferometric scheme is then introduced to optimally detect both encoded phase signals. In contrast to present day optical storage devices, our phase coding scheme has an information storage capacity which scales with the power of the read-out optical beam. We analyze the maximum number of encoding possibilities at the shot noise limit (SNL). In addition, we show that using squeezed light, the SNL can be overcome and the number of encoding possibilities increased. We discuss a possible application of our phase-coding scheme for increasing the capacities of optical storage devices.

Description

Keywords

Keywords: Channel capacity; Interferometry; Optical beam splitters; Optical data storage; Shot noise; Signal encoding; Array detection; Multibit phase coding; Shot noise limit; Split detector-based interferometric scheme; Quantum optics Array detection; Interferometer; Multimode; Optical storage; Phase coding; Quantum noise limit; Split detection; Squeezing

Citation

Source

IEEE Journal of Quantum Electronics

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1109/JQE.2006.881634

Restricted until

2037-12-31