Open AccessTunable spectral shifts and spectral switches by controllable phase modulation
Author(s) -
Mohammad Amiri,
Mohammad Taghi Tavassoly,
Hazhir Dolatkhah,
Zahra Alirezaei
Publication year - 2010
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.18.025089
Subject(s) - optics , phase modulation , phase (matter) , modulation (music) , diffraction , transmission (telecommunications) , encoding (memory) , light beam , physics , enhanced data rates for gsm evolution , computer science , topology (electrical circuits) , telecommunications , phase noise , mathematics , acoustics , quantum mechanics , artificial intelligence , combinatorics
In this work, we offer a novel and flexible approach of spectral switches which can be handled more simply by controlling the phase of the diffracted light field of a completely spatially coherent incident beam with spectral profile from a one-dimensional phase step. This scheme has the benefit of easy implementation by simply varying the height of a one-dimensional phase step which causes spectral switches to occur when the step height reaches certain critical values without modulating any properties of the light source. To illustrate this effect, an explicit and analytical expression at an observation point corresponding to the step edge is obtained and some numerical examples are given and examined experimentally. Finally, based on the obtained results, it is shown that this method with the capability of very short response time can be easily applied to information encoding and transmission.