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Development of the distributed Brill...

Li, Yun.

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Development of the distributed Brillouin sensor with high spatial and frequency resolution.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Development of the distributed Brillouin sensor with high spatial and frequency resolution./
Author:	Li, Yun.
Description:	138 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-11, Section: B, page: 6847.
Contained By:	Dissertation Abstracts International71-11B.
Subject:	Physics, Optics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR65567
ISBN:	9780494655672

Development of the distributed Brillouin sensor with high spatial and frequency resolution.
Li, Yun.

Development of the distributed Brillouin sensor with high spatial and frequency resolution. - 138 p.

Source: Dissertation Abstracts International, Volume: 71-11, Section: B, page: 6847.

Thesis (Ph.D.)--University of Ottawa (Canada), 2010.

This thesis includes studies of improving the performance of the distributed fiber optic sensor based on Brillouin scattering, especially focusing on spatial resolution and frequency resolution.

ISBN: 9780494655672Subjects--Topical Terms:

1018756
Physics, Optics.

Development of the distributed Brillouin sensor with high spatial and frequency resolution.
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035 $a (UMI)AAINR65567
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100 1 $a Li, Yun. $3 1262653
245 1 0 $a Development of the distributed Brillouin sensor with high spatial and frequency resolution.
300 $a 138 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-11, Section: B, page: 6847.
502 $a Thesis (Ph.D.)--University of Ottawa (Canada), 2010.
520 $a This thesis includes studies of improving the performance of the distributed fiber optic sensor based on Brillouin scattering, especially focusing on spatial resolution and frequency resolution.
520 $a A novel distributed Brillouin sensor based on offset locking of two distributed feedback lasers has been developed. With offset locking technique, the beat frequency of two lasers can not only be locked together but also be tuned over a wide range of more than 1GHz. Moreover, a lock-in amplifier has been applied to lock the bias drift of the electro optic modulator, which ensures the probe pulse stability and constant signal-to-noise ratio during the sensing measurement. With the offset locking based distributed Brillouin sensor, a 1m spatial resolution and 0.5°C temperature resolution has been achieved.
520 $a High spatial and frequency resolution Brillouin sensor with phase locking technique has been studied. A theoretical model dealing with laser source phase locking has been derived. Simulation and experimental results have been used to prove the ability of improving the spatial and frequency resolution with phase locking technique.
520 $a Improving the spatial and frequency resolution with different pulse pair technique has been explored. This technique can obtain high spatial resolution (<1m) and high frequency resolution (<35MHz linewidth) simultaneously along several kilometer long sensing fiber, which is a promising candidate in the field of structure health monitoring. The ultimate measurement accuracy with different pulse pair Brillouin optical time domain analysis technique has been investigated and it is determined by the combination of the system bandwidth, system signal-to-noise ratio, absolute pulse width, pulse width difference, and the rise/fall time of the pulse.
520 $a A Brillouin optical time domain analysis sensor based on optical differential parametric amplification technique has been proposed and realized to obtain high spatial and frequency resolution at the same time without increasing the measurement time. Anew theoretical model dealing with optical differential parametric amplification technique has been derived. An experiment is successfully realized to validate the proposal in a polarization maintaining fiber with a spatial resolution of 0.5 m and a strain accuracy of 6 muepsilon.
590 $a School code: 0918.
650 4 $a Physics, Optics. $3 1018756
690 $a 0752
710 2 $a University of Ottawa (Canada). $3 1017488
773 0 $t Dissertation Abstracts International $g 71-11B.
790 $a 0918
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR65567