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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3126
Title: Diffraction-induced spectral anomalies for information encoding and information hiding - Possibilities and limitations
Authors: Yadav B.K.
Bisht N.S.
Mehrotra R.
Kandpal H.C.
Published in: Optics Communications
Abstract: It has been shown both theoretically and experimentally that drastic spectral changes take place around phase singularity and the shift in the spectral lines gives rise to the phenomenon called spectral switching. The shift of spectral lines towards the blue end or towards the red end of the spectrum might perhaps be used in free space communication applications. In more recent investigations, the possibility of information encoding with spectral anomalies have been discussed for two different optical systems. In this paper, we present schemes of information encoding and information hiding in the Airy pattern formed by diffraction of spatially coherent light after passing through a circular aperture. We propose a communication system that might be used to realize a new communication technique. © 2007 Elsevier B.V. All rights reserved.
Citation: Optics Communications (2007), 277(1): 24-32
URI: https://doi.org/10.1016/j.optcom.2007.04.059
http://repository.iitr.ac.in/handle/123456789/3126
Issue Date: 2007
ISSN: 304018
Author Scopus IDs: 35815257400
23468866700
16031906700
7003383488
Author Affiliations: Yadav, B.K., Optical Radiation Standards, National Physical Laboratory, Dr. K.S., Krishnan Road, New Delhi, 110 012, India
Bisht, N.S., Optical Radiation Standards, National Physical Laboratory, Dr. K.S., Krishnan Road, New Delhi, 110 012, India
Mehrotra, R., Optical Radiation Standards, National Physical Laboratory, Dr. K.S., Krishnan Road, New Delhi, 110 012, India
Kandpal, H.C., Optical Radiation Standards, National Physical Laboratory, Dr. K.S., Krishnan Road, New Delhi, 110 012, India
Funding Details: The authors thank the Director, National Physical Laboratory, New Delhi, India for giving permission to publish the paper. The author H.C. Kandpal thank Department of Science and Technology, New Delhi, India for the financial grant under the Project SR/S2/LOP-01/2002. The authors are grateful to the referees for their constructive comments.
Corresponding Author: Yadav, B.K.; Optical Radiation Standards, National Physical Laboratory, Dr. K.S., Krishnan Road, New Delhi, 110 012, India; email: byadav@mail.nplindia.ernet.in
Appears in Collections:Journal Publications [CY]

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