000185065 001__ 185065
000185065 005__ 20180317094941.0
000185065 0247_ $$2doi$$a10.1364/OE.21.007171
000185065 022__ $$a1094-4087
000185065 02470 $$2ISI$$a000316796000056
000185065 037__ $$aARTICLE
000185065 245__ $$aTime-frequency analysis of long fiber Bragg gratings with low reflectivity
000185065 269__ $$a2013
000185065 260__ $$aWashington$$bOptical Society of America$$c2013
000185065 300__ $$a9
000185065 336__ $$aJournal Articles
000185065 520__ $$aA new technique to investigate the spatial distribution of the reflection spectrum along fabricated long weak fiber Bragg gratings (FBG) is experimentally demonstrated, together with its potential applications for distributed fiber sensing and broadband signal processing. A short pulsed coherent light signal is launched into a FBG and the signal frequency is scanned through the FBG reflection spectrum. When the pulse duration is set much shorter than the transit time through the grating a time-resolved reflected signal can be obtained for each signal frequency. It informs about the distribution of the refractive index periodic perturbation along the entire FBG length, hence the uniformity or frequency chirp information of the fabricated FBG. This technique has been implemented to demonstrate a distributed temperature sensing system with high spatial resolution and to also realize a robust all-fiber tunable delay line for broadband signals.
000185065 6531_ $$aFiber optics sensors
000185065 6531_ $$aBragg reflectors
000185065 6531_ $$aFiber Bragg gratings
000185065 700__ $$aSancho, Juan
000185065 700__ $$aChin, Sanghoon
000185065 700__ $$aBarrera, David
000185065 700__ $$aSales, Salvador
000185065 700__ $$0240503$$aThévenaz, Luc$$g106544
000185065 773__ $$j21$$k6$$q7171-7179$$tOptics Express
000185065 8564_ $$uhttp://www.opticsexpress.org/abstract.cfm?URI=oe-21-6-7171$$zURL
000185065 8564_ $$s1362045$$uhttps://infoscience.epfl.ch/record/185065/files/oe-21-6-7171.pdf$$yPublisher's version$$zPublisher's version
000185065 909CO $$ooai:infoscience.tind.io:185065$$particle$$pSTI
000185065 909C0 $$0252591$$pSCI-STI-LT$$xU12146
000185065 917Z8 $$x106544
000185065 917Z8 $$x106544
000185065 937__ $$aEPFL-ARTICLE-185065
000185065 973__ $$aEPFL$$rNON-REVIEWED$$sPUBLISHED
000185065 980__ $$aARTICLE