基于光子晶体光纤长周期光栅的传感器研究.pdf

22120111JournalofOptoelectronicsLaserVol.22No.1Jan.2011

基于光子晶体光纤长周期光栅的传感器研究

赵春柳*

(,310018)

:(LPGPCF),PCF

LPG,,PCFLPG

,1553nm(DFB)0.001dB,PCF

LPG0.3PCFLPGBragg(FBG),FBG

,PCFLPG,-0.015dB/

:(LPGPCF);;;

:TN25:A:1005008(2011)

Opticalfibersensorsbasedonlongperiodgratingsinphotonic

crystalfibers

*

ZHAOChunliu

(InstituteofOptoelectronicTechnology,ChinaJiliangUniversity,Hangzhou310018,China)

Abstract:Inthispaper,alongperiodgrating(LPG)writteninaphotoniccrystalfiber(PCF)wasinves

tigated.Byselectinganappropriategratingperiod,aLPGwithapproximatezerotemperaturesensitivity

wasrealized.ByutilizingthepropertiesoftheLPGinthePCF,twokindsofopticalfibersensorswere

developed.Thefirstonewasalowcosttemperatureinsensitivestrainsensor,inwhichtheLPGserved

asatemperatureinsensitivestrainsensinghead.Whenadistributedfeedback(DFB)laserat1553nm

wasusedasthelightsource,astrainresolutionof~0.3wasachievedbyusinganopticalpowerme

terwitharesolutionof0.001dBasthedetector.Inthesecondone,theLPGwasusedasatemperature

insensitiveinterrogationinafiberBragggrating(FBG)temperaturesensor.Thesensitivityofthepro

posedFBGtemperaturesensorwasabout-0.015dB/.Ourproposedtwokindsoffibersensors

basedontheLPGinPCFarecheaperandmorepracticalbecausetheexpensiveopticalspectrumanalyzer

(OSA)willnotbeneeded.

Keywords:longperiodgratinginphotoniccrystalfiber(LPGPCF);temperatureinsensitive;strainsen

sor;fibergrat