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.

中文翻译：

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不同比例的InGaZnO薄膜对LPFG折射率传感特性的影响

敏感材料因其种类丰富，组成比可控，结构分布多样等独特优势而被广泛应用于光纤传感领域。本文研究了InGaZnO [（In ₂ O ₃）:( Ga ₂ O ₃）长周期光纤光栅的表面。）：通过脉冲激光沉积（PLD）技术涂覆具有不同组成的（ZnO）]纳米薄膜。通过分析不同比例的InGaZnO纳米薄膜对光栅折射率传感特性的影响，实现了长周期光纤光栅（LPFG）折射率的最佳传感率和高灵敏度传感。当InGaZnO的最佳掺杂比为7：1：2时，可以实现337 nm / RIU（折射率单位）和145 dB / RIU的LPFG的高灵敏度。