High sensitivity fiber refractive index sensor using tapered 4-core fiber

2021 ◽  
Author(s):  
Zhen Tian ◽  
Lina Suo ◽  
Nan-Kuang Chen ◽  
Yicun Yao ◽  
Liqiang Zhang ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Core Fiber

A High Sensitivity Index Sensor Based on No-Core Fibers

2013 ◽  
Vol 284-287 ◽  
pp. 1986-1990
Author(s):  
Guei Ru Lin ◽  
Ming Yue Fu ◽  
Hao Jan Sheng ◽  
Hai Tao Sun ◽  
Wen Fung Liu
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Single Mode ◽  
Wavelength Shift ◽  
Refractive Index Sensor ◽  
Sensitivity Index ◽  
Reflective Index ◽  
Index Measurement ◽  
Core Fiber ◽  
Multi Mode

A simple, small-size, compact and high-sensitivity refractive-index sensor composed of a short no-core fiber (NCF) about 20 mm in length sandwiched between two pieces of single-mode fibers is proposed in this paper. The index measurement is experimentally demonstrated with the sensitivity of 7792.85 nm/ RIU in the range from 1.440 to 1.454 and 227.14 nm/ RIU in the range from 1.300 to 1.430. This sensing mechanism is based on the induced multi-mode interfering wavelength shift in the no-core fiber when the reflective index of the fiber outside is changed.

High sensitivity refractive index sensor based on micro-fiber with micro-arched transition

2019 ◽  
Vol 50 ◽  
pp. 13-18 ◽  
Author(s):  
Zengshan Xing ◽  
Yanzhen Wang ◽  
Li Tang ◽  
Jianhui Yu ◽  
Heyuan Guan ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Refractive Index Sensor

High-sensitivity refractive index sensor based on Ge–Sb–Se chalcogenide microring resonator

2021 ◽  
pp. 103792
Author(s):  
Wei Huang ◽  
Ye Luo ◽  
Wei Zhang ◽  
Chengdong Li ◽  
Lan Li ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Refractive Index Sensor

scholarly journals Simultaneous Measurement of Temperature and Refractive Index Using High Temperature Resistant Pure Quartz Grating Based on Femtosecond Laser and HF Etching

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1028
Author(s):  
Na Zhao ◽  
Qijing Lin ◽  
Kun Yao ◽  
Fuzheng Zhang ◽  
Bian Tian ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Temperature ◽  
Femtosecond Laser ◽  
Optical Fiber ◽  
Temperature Response ◽  
High Sensitivity ◽  
Xrd Analysis ◽  
Refractive Index Sensor ◽  
Compact Structure ◽  
Fluid Analysis

The optical fiber temperature and refractive index sensor combined with the hollow needle structure for medical treatment can promote the standardization of traditional acupuncture techniques and improve the accuracy of body fluid analysis. A double-parameter sensor based on fiber Bragg grating (FBG) is developed in this paper. The sensor materials are selected through X-ray diffraction (XRD) analysis, and the sensor sensing principle is theoretically analyzed and simulated. Through femtosecond laser writing pure silica fiber, a high temperature resistant wavelength type FBG temperature sensor is obtained, and the FBG is corroded by hydrofluoric acid (HF) to realize a high-sensitivity intensity-type refractive index sensor. Because the light has dual characteristics of energy and wavelength, the sensor can realize simultaneous dual-parameter sensing. The light from the lead-in optical fiber is transmitted to the sensor and affected by temperature and refractive-index; then, the reflection peak is reflected back to the lead-out fiber by the FBG. The high temperature response and the refractive index response of the sensor were measured in the laboratory, and the high temperature characteristics of the sensor were verified in the accredited institute. It is demonstrated that the proposed sensor can achieve temperature sensing up to 1150 °C with the sensitivity of 0.0134 nm/°C, and refractive sensing over a refractive range of 1.333 to 1.4027 with the sensitivity of −49.044 dBm/RIU. The sensor features the advantages of two-parameter measurement, compact structure, and wide temperature range, and it exhibits great potential in acupuncture treatment.

A CNT-coated refractive index sensor based on Michelson interferometer with thin-core fiber

2018 ◽  
Vol 46 ◽  
pp. 302-305 ◽  
Author(s):  
Bowen Wang ◽  
Kai Ni ◽  
Piaopiao Wang ◽  
Qifei Ma ◽  
Weijian Tian ◽  
...  
Keyword(s):  
Refractive Index ◽  
Michelson Interferometer ◽  
Refractive Index Sensor ◽  
Core Fiber

scholarly journals Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2097
Author(s):  
Yuan-Fong Chou Chau ◽  
Chung-Ting Chou Chao ◽  
Siti Zubaidah Binti Haji Jumat ◽  
Muhammad Raziq Rahimi Kooh ◽  
Roshan Thotagamuge ◽  
...  
Keyword(s):  
Refractive Index ◽  
Plasmon Resonance ◽  
Fano Resonance ◽  
High Sensitivity ◽  
Metal Nanostructures ◽  
Refractive Index Sensor ◽  
Metal Insulator ◽  
Wide Range ◽  
Metal Insulator Metal ◽  
Mode 2

This work proposed a multiple mode Fano resonance-based refractive index sensor with high sensitivity that is a rarely investigated structure. The designed device consists of a metal–insulator–metal (MIM) waveguide with two rectangular stubs side-coupled with an elliptical resonator embedded with an air path in the resonator and several metal defects set in the bus waveguide. We systematically studied three types of sensor structures employing the finite element method. Results show that the surface plasmon mode’s splitting is affected by the geometry of the sensor. We found that the transmittance dips and peaks can dramatically change by adding the dual air stubs, and the light–matter interaction can effectively enhance by embedding an air path in the resonator and the metal defects in the bus waveguide. The double air stubs and an air path contribute to the cavity plasmon resonance, and the metal defects facilitate the gap plasmon resonance in the proposed plasmonic sensor, resulting in remarkable characteristics compared with those of plasmonic sensors. The high sensitivity of 2600 nm/RIU and 1200 nm/RIU can simultaneously achieve in mode 1 and mode 2 of the proposed type 3 structure, which considerably raises the sensitivity by 216.67% for mode 1 and 133.33% for mode 2 compared to its regular counterpart, i.e., type 2 structure. The designed sensing structure can detect the material’s refractive index in a wide range of gas, liquids, and biomaterials (e.g., hemoglobin concentration).

A liquid refractive index sensor based on 3-core fiber Michelson interferometer

2019 ◽  
Vol 453 ◽  
pp. 124356 ◽  
Author(s):  
Min Shao ◽  
Liang Han ◽  
Haonan Sun ◽  
Xunli Yin ◽  
Xueguang Qiao
Keyword(s):  
Refractive Index ◽  
Michelson Interferometer ◽  
Refractive Index Sensor ◽  
Core Fiber
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