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Long Period Grating Imprinted on a Flat-Shaped plastic optical fiber for Refractive Index Sensing

Photonic Sensors 2023年第4期13卷 39-49页

作者： Yuan LIU Yanfei ZHOU Haiyang BAO Jie ZHENG State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130012China

A corrugated surface long period grating(LPG)was fabricated on a flat-shaped plastic optical fiber(POF)as a refractive index(RI)sensor by a simple pressing with the heat pressure and mechanical die press print method.The light propagation characteristics of an LPG imprinted on a multi-mode POF were analyzed by the method of geometrical optics.Theoretical and experimental results showed that the structural parameters of the sensor affected the RI sensing performance,and the sensor with a thinner flat thickness,a deeper groove depth of the corrugated surface LPG,and a longer LPG exhibited better RI sensing performance.When the POF with a diameter of 1 mm was pressed with the heat pressure to a flat shape with a thickness of 600μm,an LPG with a period of 300μm,a groove depth of 200μm,and a length of 6 cm was fabricated on it,and the RI sensitivity of 1447%/RIU was obtained with a resolution of 5.494×10^(−6) RIU.In addition,the influences of the POF cladding,tilting of LPG,and bending of the sensing structure were investigated.The results demonstrated that after removing the cladding and tilting or bending the LPG,the RI sensing performance was improved.When the LPG imprinted on the flat-shaped POF was bent with a curvature radius of 6/πcm,the highest sensitivity of 6563%/RIU was achieved with a resolution of 2.487×10^(−9) RIU in the RI range of 1.3330–1.4230.The proposed sensor is a low-cost solution for RI measurement with the features of easy fabrication,high sensitivity,and intensity modulation at the visible wavelengths.

关键词： plastic optical fiber fiber optic sensor flat-shaped optical fiber long period grating refractive index sensing

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Side-polished SMS based RI sensor employing macro-bending perfluorinated POF

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Opto-Electronic Advances 2021年第10期4卷 30-37页

作者： Xuezhi Zhang Boyue Yang Junfeng Jiang Kun Liu Xiaojun Fan Zhaozhu Liu Min Peng Guanlong Chen Tiegen Liu School of Precision Instrument and Opto-Electronics Engineering Tianjin UniversityTianjin 300072China Tianjin optical fiber Sensing Engineering Center Institute of Optical Fiber Sensing of Tianjin UniversityTianjin 300072China Key Laboratory of Opto-electronics Information Technology(Tianjin University) Ministry of EducationTianjin 300072China

A refractive index(RI)sensor based on perfluorinated plastic optical fiber(PF-POF)is introduced in this paper.The PF-POF as multi-mode fiber was side-polished(SP)to form a macro-bending single-mode-multimode-single-mode(SMS)structure.Both ends of the sensor were closely connected to single-mode quartz optical fiber(SMF).The spectral char-acteristics of the sensor are measured,analyzed and discussed.The results show that when the length of PF-POF is 8 cm,the macro-bending radius is 3 cm,and the SP-depth is 20μm.The intensity sensitivity reaches−219.504 dBm/RIU in the range of RI=1.330~1.356.A reference is provided for the application of PF-POF in RI sensor in the future.The sensor is featured with low-cost,good flexibility and high efficiency.

关键词： refractive index sensor perfluoropolymer fiber optical sensing plastic optical fiber

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Research on Radiation Characteristics of Polymeric plastic fiber

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High Technology Letters 2001年第2期7卷 24-26页

作者：殷宗敏 Li Rongyu Ge Wenping Liu Rui National Laboratory on Local fiber-optic Communication Networks Advanced optical Communication System Institute of Optical Fiber Technology Shanghai Jiaotong University

The anti-radiation mechanism of polymeric plastic fiber is analyzed. The radiation characteristic of this type fiber is studied. Our experimental results indicate that under the low radiation dosage (below 1 kGy) the plastic optical fiber’s transmission rate rises instead of descends while this type of fiber is radiated by γ ray, electron beam and proton beam respectively. After a period of time, it gradually reaches a constant value. But under the high radiation dosage (above 1 kGy) the fiber’s transmission rate descends after radiation. Later, it gradually goes up to a constant value.

关键词： Polymer plastic optical fiber Radiation

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