NDLI: Secure optical communications utilizing PSK modulation, polarization multiplexing and coherent digital homodyne detection with wavelength and polarization agility

Content Provider	IEEE Xplore Digital Library
Author	Salamon, A. Levy-Yurista, G. Tseytlin, M. Cho, P.S. Shpantzer, I.
Copyright Year	2003
Description	Author affiliation: CeLight Inc., Silver Spring, MD, USA (Salamon, A.; Levy-Yurista, G.; Tseytlin, M.; Cho, P.S.; Shpantzer, I.)
Abstract	Data encryption and user authentication are the major communications security (ComSec) approaches used in today's communications networks. While these methods provide an efficient means to secure the sensitive information, they do not prevent a hostile opponent from jamming the signal or tapping the link. We present here an analysis of a coherent optical communications system providing secure communications in free-space or over fiber. After reviewing the basic principles of coherent optical communications we present a system using polarization/frequency agility to secure the data link at the optical layer. The key building blocks are presented, including a QPSK transmitter, and an optical hybrid combined with a coherent digital receiver. A description of CeLight's LiNbO/sub 3/ integrated implementation of the transmitter and the receiver is detailed. Next, a theoretical analysis demonstrating the capabilities of such a secure communications system to send data over fiber and in free space eliminating the need for optical filtering and lambda-based de-multiplexing. Finally, we present an experiment demonstrating the ability of the proposed frequency hopping solution to avoid an eavesdropper from intercepting the data channel.
Starting Page	274
Ending Page	282
File Size	639010
Page Count	9
File Format	PDF
ISBN	0780381408
DOI	10.1109/MILCOM.2003.1290115
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical polarization Optical fiber communication Phase shift keying Digital modulation Optical receivers Optical transmitters Optical fiber polarization Optical filters Optical sensors WDM networks
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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