Opt Lett. 2012 Dec 15;37(24):5082-4. doi: 10.1364/OL.37.005082.
We demonstrate a miniaturized fiber in-line Mach-Zehnder interferometer based on an inner air cavity adjacent to the fiber core for high-temperature sensing. The inner air cavity is fabricated by femtosecond laser micromachining and the fusion splicing technique. Such a device is robust and insensitive to ambient refractive index change, and has high temperature sensitivity of ∼43.2 pm/°C, up to 1000°C, and low cross sensitivity to strain.
我们展示了一种基于光纤芯内相邻空气腔的微型光纤马赫-曾德尔干涉仪，用于高温传感。该空气腔是通过飞秒激光微加工和熔接技术制造的。这种器件坚固耐用，对环境折射率变化不敏感，具有高达 1000°C 的高温度灵敏度（约为 43.2 pm/°C），并且对应变的交叉灵敏度低。
