Lau K S, Wong K H, Chan T L, Yeung S K
Appl Opt. 1996 Dec 1;35(34):6836-8. doi: 10.1364/AO.35.006836.
A homemade piezoelectric phase modulator for interfero-metric fiber optic sensors was fabricated using piezoelectric buzzers as strain elements. Six piezoelectric elements were embedded between the two halves of a bakelite cylinder split along its axis and secured tightly together again to form a cylinder. Single-mode optical fiber was then wound around the cylinder to complete the unit. Up to a frequency of 500 Hz, the phase shift produced by the modulator is linearly proportional to the amplitude of the applied voltage. The sensitivity of the phase modulator is about 3.6 rad/V and has a dynamic range of 1,000 rad, which is sufficient for most phase modulation purposes.
一种用于干涉型光纤传感器的自制压电相位调制器，是利用压电蜂鸣器作为应变元件制作而成的。六个压电元件被嵌入沿其轴线劈开的酚醛树脂圆柱体的两半之间，然后再次紧紧固定在一起形成一个圆柱体。接着将单模光纤缠绕在圆柱体上以完成该装置。在高达500赫兹的频率范围内，调制器产生的相移与施加电压的幅度成线性比例关系。该相位调制器的灵敏度约为3.6弧度/伏特，动态范围为1000弧度，这对于大多数相位调制目的来说已经足够。
