[[abstract]]A fiber sensor system based on high-birefringence optical fiber and a frequency-stabilized He-Ne Zeeman laser (λ = 0.6328 µm) has been demonstrated. The small path-length changes of interest are extracted from the amplitude or phase of the laser beat frequency by using either the phase-sensitive detection or the phase-demodulation technique. A minimum detectable optical phase delay of 1.5 × 10-6 rad/Hz½ or 17 × 10-6 rad/Hz½ has been achieved.
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机译：[摘要]已经证明了一种基于高双折射光纤和频率稳定的He-Ne Zeeman激光器（λ= 0.6328 µm）的光纤传感器系统。通过使用相敏检测或相位解调技术，可以从激光拍频的幅度或相位中提取感兴趣的小路径长度变化。已实现最小可检测到的光学相位延迟1.5×10-6 rad /Hz½或17×10-6 rad /Hz½。
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