Sensing properties of long-period fiber grating with coating InSnO by pulsed laser deposition

Huanhuan Yan; Li Wang; Shufeng Li; Jin Wang; Huisong Zhang; Peng Cheng; Yong Pan

doi:10.1117/1.OE.58.6.066109

14 June 2019 Sensing properties of long-period fiber grating with coating InSnO by pulsed laser deposition

Huanhuan Yan, Li Wang, Shufeng Li, Jin Wang, Huisong Zhang, Peng Cheng, Yong Pan

Author Affiliations +

Optical Engineering, Vol. 58, Issue 6, 066109 (June 2019). https://doi.org/10.1117/1.OE.58.6.066109

Abstract

The influence of different film thickness on grating coupling coefficient and transmittance has been analyzed based on a four-layer structure model of grating and matrix transformation, in which the optimum thickness of coating [(In2O3)9(SnO2)1][indium tin oxide (ITO)] is found, and the influence of environmental refractive index and wavelength for the effective refractive index of cladding mode is simulated in theory, respectively. A structure of long-period fiber grating (LPFG) coated with ITO of high-index nanothin film by the pulsed laser deposition technology is reported. The difference of refractive index sensitivity of LPFG with ITO coating or not is analyzed in experiment. The refractive index sensitivity of LPFG with ITO coating or not is −298 and −150 nm / RIU, respectively.

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Huanhuan Yan, Li Wang, Shufeng Li, Jin Wang, Huisong Zhang, Peng Cheng, and Yong Pan "Sensing properties of long-period fiber grating with coating InSnO by pulsed laser deposition," Optical Engineering 58(6), 066109 (14 June 2019). https://doi.org/10.1117/1.OE.58.6.066109

Received: 13 December 2018; Accepted: 29 May 2019; Published: 14 June 2019

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