| 路艳芳,楼伟民,申屠锋营,王友清,沈常宇.基于马赫-曾德干涉的保偏光纤扭曲传感器研究[J].光电子激光,2018,29(1):34~38 |
| 基于马赫-曾德干涉的保偏光纤扭曲传感器研究 |
| Polarization-dependent twist sensor based on fiber Mach-Zehnder interferometer |
| 投稿时间：2017-03-12 |
| DOI： |
| 中文关键词: 光纤传感器 扭曲 马赫-曾德干涉 保偏光纤(PMF) |
| 英文关键词:fiber optic sensor twist Mach-Zehnder interference polarization maintaining fiber (PMF) |
| 基金项目:浙江省自然科学基金(LY16A040005)和国家质检公益科研专项(201510066)资助项目 (中国计量大学 光电子技术研究所,浙江 杭州 310018) |
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| 中文摘要: |
| 实现了一种基于马赫曾德干涉原理的扭曲传感 器,其主要通过将一段15mm长的保偏光纤(PMF)两 端分别与单模光纤(SMF)错位熔接构成。PMF的扭曲会导致沿两个正交偏振态传输的 光强发生变化,从而 导致干涉光谱中共振峰的强度发生变化。通过测量慢轴共振峰在顺时针和逆时针两个方向扭 曲0～180°的强 度变化,得到传感器的最高灵敏度为0.624dB/°·m－1,是 已有类似扭曲传感器灵敏度的两倍。本文扭曲传感 器结构简单,得益于实验中采用的强度解调方法,相比于相位调制型光纤传感器,价格更 低廉,在实际应用中具有更好的前景。 |
| 英文摘要: |
| A polarization-dependent twist sensor based on an in-fiber Mach-Zeh nder interferometer is proposed. The sensor is constructed by core-offset fusion splicing of a 15-mm-long pola rization maintaining fiber (PMF) between two single mode fibers.With the increasing of the twist applied on the sensor,the intensity of the output light transmitting along the two orthogonal polarization states has changed,whi ch leads to the intensity changes of the resonance peaks in the transmission spectrum.By measuring the slow axis resonance peak intensity changes in clockwise and counterclockwise directions with the distorted angle wi thin 0－180°,the maximum sensitivity can reach 0.624dB/°·m－1,which is almost 2times of that of the existing si milar strain sensor.Due to the intensity demodulation method,the proposed sen sor has an application advantage in marked contrast compared with other twist optic fiber sensors which usually employ high-cost wavelength-shif t means. |
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