Journal Article10.1109/68.229819
Using simplex codes to improve OTDR sensitivity
134
TL;DR: A coding technique for improving the sensitivity of optical time domain reflectometry (OTDR) using optical codes derived from Hadamard matrices and does not use correlation is proposed.
read more
Abstract: A coding technique for improving the sensitivity of optical time domain reflectometry (OTDR) is proposed. The technique uses optical codes derived from Hadamard matrices and does not use correlation. The sensitivity realized by this new method is shown to be superior to that obtained using Golay codes. >
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
[INVITED] State of the art of Brillouin fiber-optic distributed sensing
Avi Motil,Arik Bergman,Moshe Tur +2 more
TL;DR: In this article, the state of the art of the leading Brillouin interrogation methods, with emphasis on the significant progress made in the last 3 years, are described, as well as a short introduction to coding, which has proven instrumental in many recently obtained performance records.
350
A Review of Distributed Fibre Optic Sensors for Geo-Hydrological Applications
TL;DR: In this article, the application of distributed optical fiber sensors to geo-hydrological monitoring is reviewed and discussed, along with basic principles and main acquisition techniques, and the emphasis is placed on those related to soil levees, slopes/landslide, and ground subsidence that constitute a significant percentage of current geohazards.
217
Distributed Optical Fiber Sensing Based on Rayleigh Scattering
Luca Palmieri,Luca Schenato +1 more
TL;DR: In this paper, the authors focus on Rayleigh-based distributed optical fiber sensors, which are based on the scattering processes that originate from the interaction between light and matter, and provide unprecedented features, such as the ability of monitoring varia- tions of the observed physical field with spatial continuity along the fiber.
Extending the Real Remoteness of Long-Range Brillouin Optical Time-Domain Fiber Analyzers
Marcelo A. Soto,Xabier Angulo-Vinuesa,Sonia Martin-Lopez,Sanghoon Chin,Juan Diego Ania-Castanon,Pedro Corredera,Etienne Rochat,Miguel Gonzalez-Herraez,Luc Thévenaz +8 more
TL;DR: In this paper, a distributed optical fiber sensor based on Brillouin optical time-domain analysis is considerably extended using seeded second-order Raman amplification and optical pulse coding, in which half of the fiber is used for sensing purposes, and the other half is used to carry the optical signals to the most distant sensing point.
Real time dynamic strain monitoring of optical links using the backreflection of live PSK data.
Hugo F. Martins,Kai Shi,Benn C. Thomsen,Sonia Martin-Lopez,Miguel Gonzalez-Herraez,Seb J. Savory +5 more
TL;DR: A novel technique is proposed to implement real-time distributed strain sensing in parallel with an operating optical communication channel based on monitoring the Rayleigh backscattered light from optical communication data transmitted using standard modulation formats.
117
References
Real-time long range complementary correlation optical time domain reflectometer
Moshe Nazarathy,Steven A. Newton,R.P. Giffard,D.S. Moberly,F. Sischka,W. R. Trutna,S. Foster +6 more
TL;DR: In this article, the improved performance of an optical time-domain reflectometer (OTDR) through the application of a correlation technique using codes with complementary autocorrelation properties is discussed.
252
Complementary correlation OTDR with three codewords
TL;DR: A complementary correlation OTDR technique based on probing with only three codewords and processing with onlyThree correlations is presented, for any power of two code length.
17
Optical orthogonal pulse compression codes by hopping
TL;DR: In this paper, a simple digital processing technique for using standard M sequences or quadratic residue codes in such a way that their optical correlation is truly orthogonal is described.
14
Complementary code sets for OTDR
TL;DR: It is shown that (0,1) pulse compression code sets with zero resultant correlation sidelobes must comprise at least three codewords, and examples of such code setsWith word lengths up to 10 bits are given.
12
Optical Barker codes
P.S. Moharir,A. Selvarajan +1 more
TL;DR: Certain binary codes having good autocorrelation properties akin to Barker codes are studied to find out what makes them good binary codes to study.
10