中国激光, 2012, 39 (10): 1005001, 网络出版: 2012-08-17
飞秒激光制备的全单模光纤法布里珀罗干涉高温传感器
All Single-Mode Fiber Fabry-Pérot Interferometric High Temperature Sensor Fabricated with Femtosecond Laser
光纤光学 本征型法布里珀罗干涉传感器 高温测量 飞秒激光 fiber optics intrinsic Fabry-Pérot interferometric sensor high temperature measurement femtosecond laser
摘要
提出了一种全单模光纤的本征型法布里珀罗干涉(IFPI)高温传感器。光纤IFPI传感器由飞秒激光在标准单模光纤上刻写的一对内部反射镜和腔内光纤构成,其反射光谱的干涉条纹对比度达到10 dB,而插入损耗仅为0.1 dB。实验结果表明,该传感器的测量温度可达1000 ℃,温度灵敏度为14.9 pm/℃。而且在重复测量中,反射光谱具有良好的一致性,可以准确地实现高温传感。飞秒激光制备的光纤IFPI高温传感器完全由标准单模光纤构成,结构简单、成本低廉,易于连接现有的光纤器件构成光纤传感网络,在实际工程中有较大的应用价值。
Abstract
Fiber-optic intrinsic Fabry-Pérot interferometric (IFPI) sensor, fabricated in standard single-mode fiber with femtosecond (fs) laser, which can be used for high temperature measurements is proposed. The fiber-optic IFPI sensor consists of a pair of internal reflectors inscribed by the femtosecond laser and the in-cavity fiber. The fringe contrast of the reflection spectrum of the sensor reaches 10 dB and the insert loss is only 0.1 dB. The experimental results show that the measurable temperature of this sensor is up to 1000 ℃ and the temperature sensitivity is 14.9 pm/℃. The repeatability of the reflection spectra is very high in many measurements, which indicates that the sensor can achieve accurate measurement of high temperature. The sensor is simple, low-cost and easy to connect to the existing fiber-optic devices, so it suits for fiber-optic sensing network and has a great value in engineering.
王文辕, 文建湘, 庞拂飞, 陈娜, 王廷云. 飞秒激光制备的全单模光纤法布里珀罗干涉高温传感器[J]. 中国激光, 2012, 39(10): 1005001. Wang Wenyuan, Wen Jianxiang, Pang Fufei, Chen Na, Wang Tingyun. All Single-Mode Fiber Fabry-Pérot Interferometric High Temperature Sensor Fabricated with Femtosecond Laser[J]. Chinese Journal of Lasers, 2012, 39(10): 1005001.