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Influence of InGaZnO Films with Different Ratios on Refractive Index Sensing Characteristics of LPFG

College of Physics and Optoelectronics, Faculty of Science, Beijing University of Technology, Beijing 100124, China
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Coatings 2020, 10(10), 978; https://doi.org/10.3390/coatings10100978
Received: 20 September 2020 / Revised: 10 October 2020 / Accepted: 13 October 2020 / Published: 14 October 2020
Sensitive materials are widely used in the field of optical fiber sensing because of their unique advantages such as rich types, controllable composition ratio and diverse structure distribution. In this paper, the surface of long-period fiber gratings with InGaZnO [(In2O3):(Ga2O3):(ZnO)] nano films with different compositions were coated by pulse laser deposition (PLD) technology. The best sensing ratio and the high sensitivity sensing of the refractive index of long-period fiber grating (LPFG) were achieved through the analysis of the influence of different ratios of InGaZnO nano films on the refractive index sensing characteristics of grating. High sensitivities of 337 nm/RIU (refractive index unit) and 145 dB/RIU of the LPFG are achieved when the best doping ratio of InGaZnO is 7:1:2. View Full-Text
Keywords: refractive index sensing; InGaZnO nanofilm; LPFG; PLD refractive index sensing; InGaZnO nanofilm; LPFG; PLD
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Yan, H.; Wang, L.; Li, S.; Zhang, H.; Wang, J.; Cheng, P. Influence of InGaZnO Films with Different Ratios on Refractive Index Sensing Characteristics of LPFG. Coatings 2020, 10, 978.

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