Long path fiber-optic sensor for evanescent field absorbance measurements

1988 ◽  
Vol 60 (23) ◽  
pp. 2582-2586 ◽  
Author(s):  
Michael D. DeGrandpre ◽  
Lloyd W. Burgess
Keyword(s):  
Fiber Optic ◽  
Evanescent Field ◽  
Fiber Optic Sensor ◽  
Optic Sensor

Evanescent Field Absorption Based Fiber Optic Sensor Using Chalcogenide Glasses for Biological Tissues Detection

2020 ◽  
Vol 18 (2) ◽  
pp. 95-100
Author(s):  
Adarsh Chandra Mishra ◽  
Pravin Kumar Singh ◽  
Pooja Lohia ◽  
D. K. Dwivedi
Keyword(s):  
Chalcogenide Glasses ◽  
Near Infrared ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Normal Liver ◽  
Biological Tissues ◽  
Evanescent Field ◽  
Fiber Optic Sensor ◽  
Core Diameter ◽  
Optic Sensor

An evanescent field based fiber optic sensor is proposed using ternary chalcogenide glasses under diffuse source illumination for straight fiber for detection of biological tissues. The field distribution within the core region and evanescent field beyond it has been shown pictorially. The simulation is performed in near infrared region for three liver tissues, normal liver tissue (N), Non-cancerous metastatic tissue (NMET) and non-cancerous hepatocellular carcinoma tissue (NHCC). Interrogation of absorption coefficient and transmitted power has been performed. The effect of variation in core diameter and wavelength on sensitivity of the samples have been studied to have high sensitivity.

Nano-Optical Fiber Evanescent Field Sensors

2012 ◽  
Vol 626 ◽  
pp. 1027-1032 ◽  
Author(s):  
Radhi M. Chyad ◽  
Mohd Zubir Mat Jafri ◽  
Kamarulazizi Ibrahim
Keyword(s):  
Chemical Sensors ◽  
Fiber Optic ◽  
Evanescent Field ◽  
Fiber Optic Sensor ◽  
Core Radius ◽  
The Core ◽  
Optic Sensor ◽  
Field Sensor ◽  
Core Fiber ◽  
Absorption Field

The nanofiber optic evanescent field sensor based on a changed cladding part as a sensor presented numerically. The influences of numerical opening, core radius of the fiber, the wavelength is effected on the light source and the submicron fiber on the sensors are promise to studied in this work. The results pointed out the sensitivity of the sensor increases when the numerical opening of the fiber is increases and the core radius is decreases. The NA of the fiber affects the sensitivity of the sensor. In the uniform core fiber, the increase in the NA increases the sensitivity of the sensor. Therefore, one should choose a fiber with high NA for the design of an evanescent-wave-absorption sensor if the core of the sensing segment uniform in diameter, so that the increase in the penetration depth or number of ray reflections or both, increases the evanescent absorption field and hence the sensitivity of the sensors. Keywords:fiber optic sensor, chemical sensors, biosensors, nanofiber optic.

Fiber Optic Sensor for Measuring Rotation

2011 ◽  
Vol 14 (4) ◽  
pp. 66-72 ◽  
Author(s):  
S.M. Al-Hilly ◽  
◽  
Z. E. Khaleel ◽  
A.F. Alrubaye ◽  
◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Optic Sensor
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