Lee C E, Gibler W N, Atkins R A, Alcoz J J, Taylor H F
Opt Lett. 1991 Dec 15;16(24):1990-2. doi: 10.1364/ol.16.001990.
The sensing of temperature and of ultrasonic pressure with fiber-optic Fabry-Perot interferometers embedded in aluminum is demonstrated. The metal parts are cast in air by using graphite molds. Breakage of the fibers at the air-metal interface during the casting process is avoided through the use of stainless-steel stress-relief tubes. The optical phase in an embedded interferometer is found to be 2.9 times more sensitive to temperature change than for the same interferometer in air, in good agreement with model calculations. An embedded interferometer has also been used to detect ultrasonic waves over the frequency range of 0.1-8 MHz.
展示了利用嵌入铝中的光纤法布里-珀罗干涉仪来感知温度和超声压力。金属部件通过使用石墨模具在空气中铸造而成。通过使用不锈钢应力消除管，避免了铸造过程中纤维在空气-金属界面处的断裂。结果发现，嵌入干涉仪中的光学相位对温度变化的敏感度比在空气中的相同干涉仪高2.9倍，这与模型计算结果高度吻合。一个嵌入干涉仪还被用于检测0.1 - 8兆赫兹频率范围内的超声波。
