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Statements

Subject Item
n2:RIV%2F67985882%3A_____%2F13%3A00396714%21RIV14-MSM-67985882
rdf:type
skos:Concept n14:Vysledek
dcterms:description
A fiber-optic long-period grating (LPG) operating near the dispersion turning point in its phase matching curve, referred to as a turn-around-point (TAP) LPG, is known to be highly sensitive to external parameters. So far TAP LPGs have been realized in specially designed or post-processed conventional fibers, not yet in PCFs, which allow a great degree of freedom in engineering the fiber's dispersion properties through the control of the PCF structural parameters. We have developed the design optimization technique for TAP PCF-LPGs employing the finite element method for PCF modal analysis in a combination with the Nelder-Mead simplex method for minimizing the objective function based on target-specific PCF properties. Using this tool TAP PCF-LPGs can be designed for specified wavelength ranges and refractive indices of medium in the air holes. We present here the dispersion optimization of PCF-LPG for refractometry of gases. The resonant wavelength of an optimized PCF-LPG is subsequently highly sensitive to the refractive index of gaseous analytes, however, its large shifts could be detected with a substantially reduced resolution because the resonance dip in the TAP LPG transmission spectrum is broad. We have resolved the resolution problem by proposing an interferometric scheme based on twin TAP LPGs A fiber-optic long-period grating (LPG) operating near the dispersion turning point in its phase matching curve, referred to as a turn-around-point (TAP) LPG, is known to be highly sensitive to external parameters. So far TAP LPGs have been realized in specially designed or post-processed conventional fibers, not yet in PCFs, which allow a great degree of freedom in engineering the fiber's dispersion properties through the control of the PCF structural parameters. We have developed the design optimization technique for TAP PCF-LPGs employing the finite element method for PCF modal analysis in a combination with the Nelder-Mead simplex method for minimizing the objective function based on target-specific PCF properties. Using this tool TAP PCF-LPGs can be designed for specified wavelength ranges and refractive indices of medium in the air holes. We present here the dispersion optimization of PCF-LPG for refractometry of gases. The resonant wavelength of an optimized PCF-LPG is subsequently highly sensitive to the refractive index of gaseous analytes, however, its large shifts could be detected with a substantially reduced resolution because the resonance dip in the TAP LPG transmission spectrum is broad. We have resolved the resolution problem by proposing an interferometric scheme based on twin TAP LPGs
dcterms:title
Design of turn-around-point long-period gratings in a photonic crystal fiber for refractometry of gases Design of turn-around-point long-period gratings in a photonic crystal fiber for refractometry of gases
skos:prefLabel
Design of turn-around-point long-period gratings in a photonic crystal fiber for refractometry of gases Design of turn-around-point long-period gratings in a photonic crystal fiber for refractometry of gases
skos:notation
RIV/67985882:_____/13:00396714!RIV14-MSM-67985882
n14:predkladatel
n15:ico%3A67985882
n3:aktivita
n17:P n17:I
n3:aktivity
I, P(LD11030), P(LF11001)
n3:cisloPeriodika
6
n3:dodaniDat
n13:2014
n3:domaciTvurceVysledku
n9:6919324
n3:druhVysledku
n18:J
n3:duvernostUdaju
n6:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
68655
n3:idVysledku
RIV/67985882:_____/13:00396714
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Fiber design; Photonic crystal fiber; Microstructured optical fiber
n3:klicoveSlovo
n8:Fiber%20design n8:Photonic%20crystal%20fiber n8:Microstructured%20optical%20fiber
n3:kodStatuVydavatele
CH - Švýcarská konfederace
n3:kontrolniKodProRIV
[3CCDE883210A]
n3:nazevZdroje
Sensors and Actuators B - Chemical
n3:obor
n19:BH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
1
n3:projekt
n10:LF11001 n10:LD11030
n3:rokUplatneniVysledku
n13:2013
n3:svazekPeriodika
182
n3:tvurceVysledku
Kaňka, Jiří
n3:wos
000319488800003
s:issn
0925-4005
s:numberOfPages
9
n16:doi
10.1016/j.snb.2013.02.048