Fiber-optic curvature sensor based on step-index multimode fiber

2011 ◽  
Author(s):  
Yuan Gong ◽  
Tian Zhao ◽  
Yun-Jiang Rao ◽  
Yu Wu ◽  
Hui-Juan Wu
Keyword(s):  
Fiber Optic ◽  
Multimode Fiber ◽  
Step Index ◽  
Curvature Sensor

scholarly journals Temperature and strain-independent curvature sensor based on a singlemode/multimode fiber optic structure

2011 ◽  
Vol 22 (8) ◽  
pp. 085201 ◽  
Author(s):  
Susana Silva ◽  
O Frazão ◽  
J Viegas ◽  
L A Ferreira ◽  
F M Araújo ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Multimode Fiber ◽  
Curvature Sensor

A Step-Index Multimode Fiber-Optic Microbend Displacement Sensor Wavelength Dependent Loss

2019 ◽  
pp. 47-60
Author(s):  
Sami D. Alaruri
Keyword(s):  
Optical Fibers ◽  
Fiber Optic ◽  
Transmission Loss ◽  
Wavelength Dependence ◽  
Fiber Optic Sensors ◽  
Fused Silica ◽  
Displacement Sensor ◽  
Sensor Output ◽  
Core Diameter ◽  
Step Index

In this chapter, the wavelength dependence of bend loss in a step-index multimode optical fiber (100 µm core diameter; fused silica) was investigated for fiber bend radii ranging between 2.0 and 4.5 mm using six laser excitation wavelengths, namely, 337.1, 470, 590, 632.8, 750, and 810 nm. The results obtained from fitting the bend loss measurements to Kao's model and utilizing MATLAB® indicate that bend loss is wavelength dependent and transmission loss in multimode optical fibers increases with the decrease in the fiber bend radius. Furthermore, the response of a microbend fiber-optic displacement sensor was characterized at 337.1, 470, 632.8, 750, and 810 nm. Measurements obtained from the microbend sensor indicate that the sensor output power is linear with the applied displacement and the sensor output is wavelength dependent. Lastly, references for industrial and biomedical applications of microbend fiber-optic sensors are provided. Finally, a brief description for the transmission loss mechanisms in optical fibers is given.

Expanded Beam Fiber Optic Connectors Increase Optical Link Margin

2015 ◽  
Vol 2015 (1) ◽  
pp. 000609-000615 ◽  
Author(s):  
John Mazurowski
Keyword(s):  
Optical Fibers ◽  
High Speed ◽  
Fiber Optic ◽  
Physical Contact ◽  
Harsh Environments ◽  
Multimode Fiber ◽  
Optical Signals ◽  
Optical Link ◽  
Link Margin ◽  
Temperature Ranges

Present fiber optic connections need to align two or more optical fibers to accuracies of microns (multimode fiber) and tenths of a micron (single more fiber). For connections in rugged applications, consisting of wide temperature ranges, substantial vibration, or in the presence of contaminants, the alignment of normal physical contact connections becomes even more difficult. New expanded beam connectors make fiber optic connections more durable, and help stabilize the transmission of high speed optical signals between systems, boxes, boards, and devices in these harsh environments.

A fiber-optic bending curvature sensor based on thin-core fiber modal interferometer

2012 ◽  
Vol 38 (1) ◽  
pp. 79-82 ◽  
Author(s):  
WU Haowei ◽  
YING Chaofu ◽  
PENG Baojin ◽  
PANG Hui ◽  
ZHAO Yahui ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Core Fiber ◽  
Curvature Sensor

Measurement matrix construction by specklegrams from step index multimode fiber and its application in compressive sensing

Optik ◽  
2020 ◽  
Vol 220 ◽  
pp. 164783
Author(s):  
Qi Qin ◽  
Yan Liu ◽  
Zhongwei Tan ◽  
Muguang Wang ◽  
Fengping Yan
Keyword(s):  
Compressive Sensing ◽  
Multimode Fiber ◽  
Measurement Matrix ◽  
Step Index ◽  
Matrix Construction
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