Rugeland Patrik, Margulis Walter
Department of Fiber Photonics, Acreo, Electrum 236, 164 40 Stockholm, Sweden.
Appl Opt. 2012 Sep 1;51(25):6227-32. doi: 10.1364/AO.51.006227.
A twin-core fiber Michelson interferometer is evaluated as a high-temperature sensor. Although linear and reproducible operation up to 300°C is obtained, at higher temperatures (700°C) the refractive index shifts plastically and hysteresis is observed, rendering an untreated sensor head unusable. The shift is shown to be greatly reduced by an annealing process of the fiber for 10 h at 900°C, with which the linear response is preserved.
一种双芯光纤迈克尔逊干涉仪被评估用作高温传感器。虽然在高达300°C时可实现线性且可重复的操作，但在更高温度（700°C）下，折射率会发生塑性变化并出现滞后现象，导致未处理的传感头无法使用。结果表明，通过在900°C下对光纤进行10小时的退火处理，这种变化会大大减小，并且能保持线性响应。
