ABSTRACT We demonstrate the implementation of a temperature sensor based on mechanically induced long-period fibre gratings (MILPFGs) using a 3-D printing technology. Our sensor has an assembled structure with a periodically V-grooved plate, a flat cradle, and an assembly case, all of which are 3-D-printed with a thermoplastic of acrylonitrile butadiene styrene (ABS). Our sensor exhibits the linear change of both wavelength and loss of the resonance peak depending on environmental temperature, unlike the conventional LPFGs-based temperature sensors. The observed resonance loss change can be attributed to the micro-expansion of our 3-D-printed assembly structure, which decreases the screw-induced strain. The temperature sensitivities of our sensor are measured to be −97 pm/°C and 0.33 dB/°C for the wavelength and loss of the resonance peak, respectively.

中文翻译：

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基于机械诱导长周期光纤光栅的 3D 打印温度传感器

摘要 我们展示了使用 3D 打印技术实现基于机械诱导长周期光纤光栅 (MILPFG) 的温度传感器。我们的传感器具有带有周期性 V 形槽板、扁平支架和组装盒的组装结构，所有这些都是用丙烯腈丁二烯苯乙烯 (ABS) 热塑性塑料 3D 打印的。与传统的基于 LPFG 的温度传感器不同，我们的传感器根据环境温度表现出波长和共振峰损耗的线性变化。观察到的共振损耗变化可归因于我们的 3D 打印装配结构的微膨胀，这降低了螺钉引起的应变。我们的传感器的温度灵敏度测量为 -97 pm/°C 和 0.33 dB/°C 的共振峰波长和损耗，