In-fiber Mach–Zehnder interferometer based on polarization-maintaining fiber for displacement and temperature sensing

IF 0.7 4区 物理与天体物理 Q4 OPTICS Optica Applicata Pub Date : 2023-01-01 DOI:10.37190/oa230102
Jun-ni Cheng, Xiao-yan Jiang
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Abstract

A displacement sensor based on polarization-maintaining fiber has been proposed and proved in experiment. The polarization-maintaining fiber (PMF) is sandwiched with two graded-index multimode fibers (GI MMF), which form the Mach–Zehnder interferometer (MZI) sensor. Graded-index multimode fiber serve as an optical coupler for modes conversion. The results show that with the increase of displacement, the spectrum moves to the long wavelength direction, but when temperature increases, the spectrum has a red shift, which means that the displacement and temperature can be measured separately according to the wavelength drift direction. The sensor consists of 4 mm GI MMF and 14 mm PMF, which can exhibit the displacement sensitivity of –9.275 pm/μm in the range of 0–600 μm. In addition, temperature will also affect the sensitivity of displacement measurement, so the sensitivity of the sensor to temperature is also measured. The results show that the selected monitoring dip provides a better temperature sensitivity of 33.605 pm/℃ in the range of 35–75℃. The sensor is easy to fabricate and does not has any functional coating, which make it become a good candidate in the industrial field.
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基于保偏光纤的光纤内马赫-曾德尔干涉仪用于位移和温度传感
提出了一种基于保偏光纤的位移传感器,并进行了实验验证。将保偏光纤(PMF)与两根梯度折射率多模光纤(GI MMF)夹在一起,构成马赫-曾德尔干涉仪(MZI)传感器。梯度折射率多模光纤是一种用于模式转换的光耦合器。结果表明,随着位移的增加,光谱向长波方向移动,但当温度升高时,光谱发生红移,这意味着位移和温度可以根据波长漂移方向分别测量。该传感器由4 mm GI MMF和14 mm PMF组成,在0 ~ 600 μm范围内具有-9.275 pm/μm的位移灵敏度。另外,温度也会影响位移测量的灵敏度,所以也要测量传感器对温度的灵敏度。结果表明,所选监测倾角在35 ~ 75℃范围内具有较好的温度灵敏度,为33.605 pm/℃。该传感器易于制造,且不需要任何功能涂层,使其成为工业领域的一个很好的候选者。
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来源期刊
Optica Applicata
Optica Applicata 物理-光学
CiteScore
1.00
自引率
16.70%
发文量
21
审稿时长
4 months
期刊介绍: Acoustooptics, atmospheric and ocean optics, atomic and molecular optics, coherence and statistical optics, biooptics, colorimetry, diffraction and gratings, ellipsometry and polarimetry, fiber optics and optical communication, Fourier optics, holography, integrated optics, lasers and their applications, light detectors, light and electron beams, light sources, liquid crystals, medical optics, metamaterials, microoptics, nonlinear optics, optical and electron microscopy, optical computing, optical design and fabrication, optical imaging, optical instrumentation, optical materials, optical measurements, optical modulation, optical properties of solids and thin films, optical sensing, optical systems and their elements, optical trapping, optometry, photoelasticity, photonic crystals, photonic crystal fibers, photonic devices, physical optics, quantum optics, slow and fast light, spectroscopy, storage and processing of optical information, ultrafast optics.
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