Journal ArticleDOI
Coherent self-heterodyne Brillouin OTDR for measurement of Brillouin frequency shift distribution in optical fibers
TLDR
In this article, a coherent self-heterodyne detection system employing a recently proposed frequency translator, a DFB laser diode, and erbium-doped fiber amplifiers is demonstrated.Abstract:
Time domain reflectometry of spontaneously Brillouin scattered lightwaves in a single-mode optical fiber is demonstrated with a coherent self-heterodyne detection system employing a recently proposed frequency translator, a DFB laser diode, and erbium-doped fiber amplifiers. Since the probe pulse frequency is up-converted by the translator by an amount approximately equal to the Brillouin frequency shift, the self-heterodyne beat frequency can be reduced to a sufficiently low frequency in the IF band. The system enables one-end measurement of the Brillouin frequency shift distribution in optical fibers with a single way dynamic range (SWDR) of 16 dB and a frequency resolution of 5 MHz for a spatial resolution of 100 m. >read more
Citations
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Journal ArticleDOI
Development of a distributed sensing technique using Brillouin scattering
TL;DR: In this article, a distributed strain and temperature sensing technique that uses Brillouin scattering in single-mode optical fibers is presented, which is based on strain- and temperature-induced changes in the frequency shift.
Journal ArticleDOI
A review of distributed optical fiber sensors for civil engineering applications
TL;DR: The latest developments related with the improvement of these products are presented by presenting a wide range of laboratory experiments as well as an extended review of their diverse applications in civil engineering structures.
Journal ArticleDOI
Distributed optical fiber sensing: Review and perspective
Ping Lu,Nageswara Lalam,Mudabbir Badar,Bo Liu,Bo Liu,Benjamin Chorpening,Michael P. Buric,Paul R. Ohodnicki +7 more
TL;DR: This work is focused on a review of three types of distributed optical fiber sensors which are based on Rayleigh, Brillouin, and Raman scattering, and use various demodulation schemes, including optical time-domain reflectometry, optical frequency-domainreflectometry, and related schemes.
Journal ArticleDOI
[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.
Journal ArticleDOI
Intensifying the response of distributed optical fibre sensors using 2D and 3D image restoration
TL;DR: An unprecedented boost in signal-to-noise ratio and measurement contrast is experimentally demonstrated and an approach for performance enhancement that exploits the high level of similitude and redundancy contained on the multidimensional information measured by distributed fibre sensors is proposed.
References
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Book
Nonlinear Fiber Optics
TL;DR: The field of nonlinear fiber optics has advanced enough that a whole book was devoted to it as discussed by the authors, which has been translated into Chinese, Japanese, and Russian languages, attesting to the worldwide activity in the field.
Journal ArticleDOI
Self-phase-modulation in silica optical fibers
Roger H. Stolen,Chinlon Lin +1 more
TL;DR: In this paper, the authors report measurements of frequency broadening due to self-phase modulation (SPM) in optical fibers, using single-mode silica-core fibers and mode-locked argon-laser pulses.
Journal ArticleDOI
Stimulated Brillouin Scattering in Monomode Optical Fiber
TL;DR: In this paper, the important dependence of the SBS gain and threshold on the spectrum and modulation parameters of the optical transmitter is discussed and possible techniques for suppressing SBS in optical communications systems are discussed.
Journal ArticleDOI
A technique to measure distributed strain in optical fibers
TL;DR: In this paper, a technique based on Brillouin optical fiber time-domain analysis (BOTDA) was proposed for optical fiber wound on drums at various tensions is presented, achieving better than 2*10/sup -5/ and a spatial resolution of 100 m.