Simultaneous measurement of refractive index, strain and temperature using a tapered structure based on SMF

2018 ◽  
Vol 410 ◽  
pp. 70-74 ◽  
Author(s):  
Na Zhang ◽  
Wei Xu ◽  
Shanhong You ◽  
Cheungchuen Yu ◽  
Changyuan Yu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Simultaneous Measurement ◽  
Index Strain

scholarly journals Hybrid Grating in Reduced-Diameter Fiber for Temperature-Calibrated High-Sensitivity Refractive Index Sensing

2019 ◽  
Vol 9 (9) ◽  
pp. 1923
Author(s):  
Biqiang Jiang ◽  
Zhen Hao ◽  
Dingyi Feng ◽  
Kaiming Zhou ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Simultaneous Measurement ◽  
Surrounding Medium ◽  
High Sensitivity ◽  
Fiber Grating ◽  
Bragg Resonance ◽  
Core Mode ◽  
Promising Alternative ◽  
Sensing Applications ◽  
Highly Sensitive

We propose and experimentally demonstrate a hybrid grating, in which an excessively tilted fiber grating (Ex-TFG) and a fiber Bragg grating (FBG) were co-inscribed in a reduced-diameter fiber (RDF). The hybrid grating showed strong resonances due to coupling among core mode and a set of polarization-dependent cladding modes. This coupling showed enhanced evanescent fields by the reduced cladding size, thus allowing stronger interaction with the surrounding medium. Moreover, the FBG’s Bragg resonance confined by the thick cladding was exempt from the change of the surrounding medium’s refractive index (RI), and then the FBG can work as a temperature compensator. As a result, the Ex-TFG in RDF promised a highly sensitive RI measurement, with a sensitivity up to ~1224 nm/RIU near the RI of 1.38. Through simultaneous measurement of temperature and RI, the temperature dependence of water’s RI is then determined. Therefore, the proposed hybrid grating with a spectrum of multi-peaks embedded with a sharp Bragg resonance is a promising alternative for the simultaneous measurement of multi-parameters for many RI-based sensing applications.

Simultaneous Measurement of Refractive Index and Temperature Based on Optical Fiber Cavity Sensor

2016 ◽  
Vol 45 (3) ◽  
pp. 306003
Author(s):  
时菲菲 SHI Fei-fei ◽  
赵春柳 ZHAO Chun-liu ◽  
徐贲 XU Ben ◽  
王东宁 WANG Dong-ning
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Simultaneous Measurement

Simultaneous measurement of temperature and refractive index with F–P microcavity sensor based on graded-index few mode fiber

2020 ◽  
Vol 455 ◽  
pp. 124577 ◽  
Author(s):  
Xinghu Fu ◽  
Lianxu Liu ◽  
Shuming Huang ◽  
Guangwei Fu ◽  
Wa Jin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Simultaneous Measurement ◽  
Graded Index

Liquid Core Fiber Interferometer for Simultaneous Measurement of Refractive Index and Temperature

2019 ◽  
Vol 31 (2) ◽  
pp. 189-192 ◽  
Author(s):  
Shuhui Liu ◽  
Hailiang Zhang ◽  
Litong Li ◽  
Liangming Xiong ◽  
Ping Shum
Keyword(s):  
Refractive Index ◽  
Simultaneous Measurement ◽  
Liquid Core ◽  
Core Fiber

Simultaneous Measurement of Refractive Index and Thickness of Transparent Plates by Low Coherence Interferometry

1997 ◽  
Vol 4 (4) ◽  
pp. 507-515 ◽  
Author(s):  
Masato Ohmi ◽  
Takehisa Shiraishi ◽  
Hideyuki Tajiri ◽  
Masamitsu Haruna
Keyword(s):  
Refractive Index ◽  
Simultaneous Measurement ◽  
Low Coherence ◽  
Low Coherence Interferometry
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