scholarly journals High Sensitive Temperature Sensor Using a Liquid-core Optical Fiber with Small Refractive Index Difference Between Core and Cladding Materials

Sensors ◽  
2008 ◽  
Vol 8 (3) ◽  
pp. 1872-1878 ◽  
Author(s):  
Yonghao Xu ◽  
Xianfeng Chen ◽  
Yu Zhu
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Temperature Sensor ◽  
Liquid Core ◽  
Refractive Index Difference

scholarly journals Modes Effective Refractive Index Difference Measurement in Few-mode Optical Fiber

2016 ◽  
Vol 140 ◽  
pp. 77-84 ◽  
Author(s):  
Jing Zhang ◽  
Zhifang Wu ◽  
Tianye Huang ◽  
Xuguang Shao ◽  
Ping Shum
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Effective Refractive Index ◽  
Difference Measurement ◽  
Refractive Index Difference

Optical fiber temperature sensor with insensitive refractive index and strain based on phase demodulation

2020 ◽  
Vol 62 (12) ◽  
pp. 3733-3738
Author(s):  
Tong Nan ◽  
Bo Liu ◽  
Yongfeng Wu ◽  
Junfeng Wang ◽  
Yaya Mao ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Temperature Sensor ◽  
Phase Demodulation

Refractive index and temperature sensor based on optical fiber Mach–Zehnder interferometer with trapezoid cone

2019 ◽  
Vol 58 (05) ◽  
pp. 1 ◽  
Author(s):  
Wenlin Gao ◽  
Weihua Zhang ◽  
Zhengrong Tong ◽  
Yimei Zhong ◽  
Juan Qin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Temperature Sensor ◽  
Zehnder Interferometer ◽  
Mach Zehnder Interferometer

scholarly journals Fabrication and characterization of a hybrid four-hole AsSe_2-As_2S_5 microstructured optical fiber with a large refractive index difference

2014 ◽  
Vol 22 (11) ◽  
pp. 13322 ◽  
Author(s):  
Tonglei Cheng ◽  
Yasuhire Kanou ◽  
Dinghuan Deng ◽  
Xiaojie Xue ◽  
Morio Matsumoto ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Microstructured Optical Fiber ◽  
Refractive Index Difference ◽  
Fabrication And Characterization

Tunable third-harmonic generation in a chalcogenide-tellurite hybrid optical fiber with high refractive index difference

2014 ◽  
Vol 39 (4) ◽  
pp. 1005 ◽  
Author(s):  
Tonglei Cheng ◽  
Weiqing Gao ◽  
Meisong Liao ◽  
Zhongchao Duan ◽  
Dinghuan Deng ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
High Refractive Index ◽  
Third Harmonic ◽  
Refractive Index Difference

A PHOTONIC CRYSTAL FIBER BASED ON SURFACE PLASMON RESONANCE TEMPERATURE SENSOR WITH LIQUID CORE

2012 ◽  
Vol 26 (13) ◽  
pp. 1250082 ◽  
Author(s):  
P. B. BING ◽  
Z. Y. LI ◽  
J. Q. YAO ◽  
Y. LU ◽  
Z. G. DI
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Temperature Sensor ◽  
Liquid Core ◽  
Plasmon Mode ◽  
Crystal Fiber

A Photonic Crystal Fiber based on Surface Plasmon Resonance (PCF-SPR) temperature sensor with liquid core is proposed in this paper. Glycerin liquid with a high refractive index is filled in the central air hole of the hollow core photonic bandgap (PBG) PCF, the transmission type of PCF will change to total internal reflection (TIR), which will significantly broaden its transmission bands. The refractive index of glycerin changes with temperature within a certain temperature range and can be detected by measuring the transmission spectra, thus the accurate ambient temperature can be obtained. Numerical results indicate that the plasmon on the surface of the gold-coated channels containing glycerin liquid can be intensively excited by the core-guided mode and the excitation of the plasmon mode is sensitive to the change of the temperature. Resolution of the PCF-SPR temperature sensor with liquid core is demonstrated to be as low as 4 × 10-6 RIU, where RIU means refractive index unit.

scholarly journals Optical Fiber FP Sensor for Simultaneous Measurement of Refractive Index and Temperature Based on the Empirical Mode Decomposition Algorithm

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 664 ◽  
Author(s):  
Everardo Vargas-Rodriguez ◽  
Ana Dinora Guzman-Chavez ◽  
Roberto Baeza-Serrato ◽  
Mario Alberto Garcia-Ramirez
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Empirical Mode Decomposition ◽  
Temperature Sensor ◽  
Dynamic Measurement ◽  
Intrinsic Mode Functions ◽  
Interferometric Sensors ◽  
Mode Decomposition ◽  
The Mathematical Model ◽  
Proof Of Principle

In this work, a dual refractive index and temperature sensor based on an interferometric system and on the empirical mode decomposition (EMD) algorithm is presented. Here, it is shown that the EMD provides a comprehensive way to analyze and decompose complex reflection spectra produced by an interferometric filter build at the tip of an optical fiber. By applying the EMD algorithm, the spectrum can be decomposed into a set of intrinsic mode functions (IMF) from which the temperature and the refractive index can be easily extracted. Moreover, the proposed methodology provides a detailed insight of the behavior of this type of interferometric sensors and allows widening of the dynamic measurement ranges of both variables. Here, for proof of principle purposes, a filter based on a stack of three layers (two of them were thermo-sensitive) was fabricated. Finally, it is shown that the proposed methodology can decompose the experimental measured spectra and to determine the refractive index and the temperature, supporting the mathematical model.

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