An in-line fibre etalon sensor system using the laser chirp and three wavelength arc-tangent algorithm to measure the absolute phase is studied. We proposed and proved the new algorithm by performing the experiments. As a result of signal processing, the minimum detectable strain was 6.3 /spl mu/ strain.
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机译：研究了一种采用激光chi和三波长反正切算法测量绝对相位的在线光纤标准具传感器系统。我们通过实验提出并证明了该新算法。作为信号处理的结果，最小可检测应变为6.3 / spl mu /应变。
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