Ultrasensitive Refractive Index Sensor Based on Optical Fiber Couplers Assisted with Vernier Effect

2020 ◽  
Vol 40 (2) ◽  
pp. 0206002
Author(s):  
郝晋青 Hao Jinqing ◽  
韩丙辰 Han Bingchen
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Refractive Index Sensor ◽  
Vernier Effect

scholarly journals Refractive Index Sensor for Salty and Sugary Solution Based on Optical Fiber Technical

2021 ◽  
Vol 1879 (3) ◽  
pp. 032077
Author(s):  
Maher Khaleel Ibrahim ◽  
Shehab A Kadhim ◽  
Nabeil Ibrahim Fawaz
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
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.

Temperature Dependence of a Refractive Index Sensor Based on Side-Polished Macrobending Plastic Optical Fiber

2016 ◽  
Vol 16 (2) ◽  
pp. 355-358 ◽  
Author(s):  
Ning Jing ◽  
Chuanxin Teng ◽  
Fangda Yu ◽  
Guanjun Wang ◽  
Jie Zheng
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Temperature Dependence ◽  
Refractive Index Sensor ◽  
Plastic Optical Fiber

Optical Fiber Refractive Index Sensor for Chloride Ion Monitoring

2009 ◽  
Vol 9 (5) ◽  
pp. 525-532 ◽  
Author(s):  
Cathy Chung Chun Lam ◽  
Rajesh Mandamparambil ◽  
Tong Sun ◽  
Kenneth T. V. Grattan ◽  
Sreejith V. Nanukuttan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Chloride Ion ◽  
Refractive Index Sensor
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