Open AccessRealizing high density optical data storage by using orbital angular momentum of light beam
Author(s) -
Yidong Liu,
Chunqing Gao,
Gao Ming-Wei,
Feng Li
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.854
Subject(s) - angular momentum , physics , optics , light beam , orbital angular momentum of light , spectral density , optical storage , beam (structure) , 3d optical data storage , storage ring , total angular momentum quantum number , telecommunications , computer science , quantum mechanics
The orbital angular momentum (OAM) states can be used to construct a high-dimensional Hilbert space, which implies higher data density when applied in data storage. This work proposes a method to realize high density optical data storage by using OAM of light beam, with the encoded area illuminated by a light beam with certain OAM resulting in distribution of power in the OAM states (the spiral spectrum or OAM spectrum), and detection of the power distribution conducing to its decoding. A quadrant staircase structure (QSS) used as an encoded element can realize 57 different states, and it is expected to enhance the data density 6 times as high as the conventional method.