scholarly journals Low-cost high-performance fiber-optic pH sensor based on thin-core fiber modal interferometer

2009 ◽  
Vol 17 (25) ◽  
pp. 22296 ◽  
Author(s):  
Bobo Gu ◽  
Ming-Jie Yin ◽  
A. Ping Zhang ◽  
Jin-Wen Qian ◽  
Sailing He
Keyword(s):  
High Performance ◽  
Fiber Optic ◽  
Low Cost ◽  
Ph Sensor ◽  
High Performance Fiber ◽  
Core Fiber

scholarly journals Low-Cost, High-Performance Fiber Optic Fabry–Perot Sensor for Ultrasonic Wave Detection

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 406 ◽  
Author(s):  
Haoyong Li ◽  
Delin Li ◽  
Chaoyu Xiong ◽  
Wenrong Si ◽  
Chenzhao Fu ◽  
...  
Keyword(s):  
High Performance ◽  
Microelectromechanical Systems ◽  
Fiber Optic ◽  
Low Cost ◽  
Experimental Tests ◽  
Silicon On Insulator ◽  
Processing Technology ◽  
Fabry Perot ◽  
High Performance Fiber ◽  
The Cost

This study describes a novel fiber optic extrinsic Fabry–Perot interferometric (EFPI) ultrasonic sensor comprising a low-cost and high-performance silicon diaphragm. A vibrating diaphragm, 5 μm thick, was fabricated by using the Microelectromechanical Systems (MEMS) processing technology on a silicon-on-insulator (SOI) wafer. The Fabry–Perot (FP) cavity length was solely determined during the manufacturing process of the diaphragm by defining a specific stepped hole on the handling layer of the SOI wafer, which made the assembly of the sensor easier. In addition, the use of cheap and commercially available components and MEMS processing technology in the development of the sensing system, limited the cost of the sensor. The experimental tests showed that the minimum detectable ultrasonic pressure was 1.5 mPa/sqrt(Hz) –0.625 mPa/sqrt(Hz) between 20 kHz and 40 kHz. As a result, this sensor has the potential to successfully detect weak ultrasonic signals.

High-performance fiber optic systems for damage detection and structural health monitoring

2004 ◽  
Author(s):  
Mark E. Seaver ◽  
Stephen T. Trickey ◽  
Jonathan M. Nichols ◽  
Linda Moniz ◽  
Lou Pecora ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Damage Detection ◽  
Health Monitoring ◽  
High Performance ◽  
Fiber Optic ◽  
Structural Health ◽  
High Performance Fiber ◽  
Optic Systems

High Performance Fiber Optic Transceivers for Infotainment Networks in Automobiles

2006 ◽  
pp. 381-398 ◽  
Author(s):  
T. Wipiejewski ◽  
F. Ho ◽  
B. Lui ◽  
W. Hung ◽  
F.-W. Tong ◽  
...  
Keyword(s):  
High Performance ◽  
Fiber Optic ◽  
High Performance Fiber

System level radiation response of a high performance fiber optic data bus

1996 ◽  
Vol 43 (3) ◽  
pp. 1030-1037 ◽  
Author(s):  
C.J. Dale ◽  
P.W. Marshall ◽  
M.E. Fritz ◽  
M. de La Chapelle ◽  
M.A. Carts ◽  
...  
Keyword(s):  
High Performance ◽  
Fiber Optic ◽  
System Level ◽  
Radiation Response ◽  
High Performance Fiber ◽  
Data Bus

scholarly journals On The Application of SiO2/SiC Grating on Ag for High-Performance Fiber Optic Plasmonic Sensing of Cortisol Concentration

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1623 ◽  
Author(s):  
Ankit Kumar Pandey ◽  
Anuj K. Sharma ◽  
Carlos Marques
Keyword(s):  
High Performance ◽  
Figure Of Merit ◽  
Fiber Optic ◽  
Limit Of Detection ◽  
Cortisol Concentration ◽  
Practical Implementation ◽  
Angle Of Incidence ◽  
Plasmonic Sensor ◽  
High Performance Fiber ◽  
Better Than

This paper reports on high-accuracy simulation of a grating structure based fiber optic plasmonic sensor for salivary cortisol sensing. Gratings of SiO2 and SiC (one at a time) in combination with a thin Ag layer are considered to be in direct contact with analyte medium (solutions containing different concentrations of cortisol) considering that the groove regions are also filled with analyte. The optimization of Ag layer thickness is carried out to achieve maximum power loss (PL) corresponding to cortisol concentration variation. The variation of PL (in dB) spectra with the angle of incidence (α) is the sensing mechanism of the proposed scheme. Sensing performance is extensively analyzed in terms of sensitivity, limit-of-detection (LOD) and figure-of-merit (FOM) that incorporates both the sensitivity and the width of the corresponding PL curves. While the sensitivity and FOM values are significantly large, the results also reveal that in angular interrogation mode (AIM), an average LOD of 9.9 pg/mL and 9.8 pg/mL is obtained for SiO2 and SiC-based sensor designs, respectively. When the intensity interrogation method (IIM) in place of AIM is considered, an average LOD of 22.6 fg/mL and 68.17 fg/mL is obtained for SiO2 and SiC-based sensor designs, respectively. LOD (with IIM, in particular) is considerably better than the present-state-of-art related to cortisol monitoring. Pragmatic model for possible practical implementation of sensor scheme is also discussed. The involvement of optical fiber in the proposed sensor design makes it possible to implement it as a flexible sensor or for wearable solution for cortisol detection via sweat monitoring as well as for measuring cortisol level in aquaculture tanks where concentration levels are much lower than 10 ng/mL.

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