Analysis of nonlinear fitting methods for distributed measurement of temperature and strain over 36 km optical fiber based on spontaneous Brillouin backscattering

Hyungwoo Kwon; Suhwan Kim; Sehyuk Yeom; Byoungho Kang; Kyujin Kim; Taeheok Kim; Hangseok Jang; Jeehyun Kim; Shinwon Kang

doi:10.1016/j.optcom.2012.12.012

Analysis of nonlinear fitting methods for distributed measurement of temperature and strain over 36 km optical fiber based on spontaneous Brillouin backscattering

Hyungwoo Kwon, Suhwan Kim, Sehyuk Yeom, Byoungho Kang, Kyujin Kim, Taeheok Kim, Hangseok Jang, Jeehyun Kim, Shinwon Kang

School of Electronics Engineering

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

We experimentally analyzed two different nonlinear fitting methods for a Brillouin optical time domain reflectometery (BOTDR) system. By measuring the spontaneous Brillouin frequency and comparing a Lorentzian fit with a Voigt fit, we confirmed that the accuracy of the Lorentzian fit was higher than that of the Voigt fit. We also performed long-range distributed measurements using coherent detection system with a 36 km long-range optical fiber. The extinction ratio of optical pulse was improved by employing an acousto-optic modulator (AOM). As a result, we could successfully measure the Brillouin frequency shift (BFS) using a Lorentzian fit algorithm in order to calculate applied temperature and strain in the optical fiber.

Original language	English
Pages (from-to)	59-63
Number of pages	5
Journal	Optics Communications
Volume	294
DOIs	https://doi.org/10.1016/j.optcom.2012.12.012
State	Published - 1 May 2013

Keywords

BOTDR
Distributed sensing
Nonlinear curve fitting
Spontaneous Brillouin scattering

Access to Document

10.1016/j.optcom.2012.12.012

Cite this

@article{6cb326b59d8c4c09b09a5680f600d634,

title = "Analysis of nonlinear fitting methods for distributed measurement of temperature and strain over 36 km optical fiber based on spontaneous Brillouin backscattering",

abstract = "We experimentally analyzed two different nonlinear fitting methods for a Brillouin optical time domain reflectometery (BOTDR) system. By measuring the spontaneous Brillouin frequency and comparing a Lorentzian fit with a Voigt fit, we confirmed that the accuracy of the Lorentzian fit was higher than that of the Voigt fit. We also performed long-range distributed measurements using coherent detection system with a 36 km long-range optical fiber. The extinction ratio of optical pulse was improved by employing an acousto-optic modulator (AOM). As a result, we could successfully measure the Brillouin frequency shift (BFS) using a Lorentzian fit algorithm in order to calculate applied temperature and strain in the optical fiber.",

keywords = "BOTDR, Distributed sensing, Nonlinear curve fitting, Spontaneous Brillouin scattering",

author = "Hyungwoo Kwon and Suhwan Kim and Sehyuk Yeom and Byoungho Kang and Kyujin Kim and Taeheok Kim and Hangseok Jang and Jeehyun Kim and Shinwon Kang",

year = "2013",

month = may,

day = "1",

doi = "10.1016/j.optcom.2012.12.012",

language = "English",

volume = "294",

pages = "59--63",

journal = "Optics Communications",

issn = "0030-4018",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Analysis of nonlinear fitting methods for distributed measurement of temperature and strain over 36 km optical fiber based on spontaneous Brillouin backscattering

AU - Kwon, Hyungwoo

AU - Kim, Suhwan

AU - Yeom, Sehyuk

AU - Kang, Byoungho

AU - Kim, Kyujin

AU - Kim, Taeheok

AU - Jang, Hangseok

AU - Kim, Jeehyun

AU - Kang, Shinwon

PY - 2013/5/1

Y1 - 2013/5/1

N2 - We experimentally analyzed two different nonlinear fitting methods for a Brillouin optical time domain reflectometery (BOTDR) system. By measuring the spontaneous Brillouin frequency and comparing a Lorentzian fit with a Voigt fit, we confirmed that the accuracy of the Lorentzian fit was higher than that of the Voigt fit. We also performed long-range distributed measurements using coherent detection system with a 36 km long-range optical fiber. The extinction ratio of optical pulse was improved by employing an acousto-optic modulator (AOM). As a result, we could successfully measure the Brillouin frequency shift (BFS) using a Lorentzian fit algorithm in order to calculate applied temperature and strain in the optical fiber.

AB - We experimentally analyzed two different nonlinear fitting methods for a Brillouin optical time domain reflectometery (BOTDR) system. By measuring the spontaneous Brillouin frequency and comparing a Lorentzian fit with a Voigt fit, we confirmed that the accuracy of the Lorentzian fit was higher than that of the Voigt fit. We also performed long-range distributed measurements using coherent detection system with a 36 km long-range optical fiber. The extinction ratio of optical pulse was improved by employing an acousto-optic modulator (AOM). As a result, we could successfully measure the Brillouin frequency shift (BFS) using a Lorentzian fit algorithm in order to calculate applied temperature and strain in the optical fiber.

KW - BOTDR

KW - Distributed sensing

KW - Nonlinear curve fitting

KW - Spontaneous Brillouin scattering

UR - http://www.scopus.com/inward/record.url?scp=84875668355&partnerID=8YFLogxK

U2 - 10.1016/j.optcom.2012.12.012

DO - 10.1016/j.optcom.2012.12.012

M3 - Article

AN - SCOPUS:84875668355

SN - 0030-4018

VL - 294

SP - 59

EP - 63

JO - Optics Communications

JF - Optics Communications

ER -

Analysis of nonlinear fitting methods for distributed measurement of temperature and strain over 36 km optical fiber based on spontaneous Brillouin backscattering

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this