scholarly journals Quantitative in situ measurement of optical force along a strand of cleaved silica optical fiber induced by the light guided therewithin

2021 ◽  
Author(s):  
Mikko Partanen ◽  
Hyeonwoo Lee ◽  
Kyunghwan Oh
Keyword(s):  
Optical Fiber ◽  
In Situ Measurement ◽  
Optical Force ◽  
Silica Optical Fiber

Characterization of an optical-fiber reflectometer for in situ measurement applications

1995 ◽  
Vol 34 (34) ◽  
pp. 7952 ◽  
Author(s):  
D. Hernandez ◽  
G. Olalde ◽  
E. Milcent ◽  
A. Beck
Keyword(s):  
Optical Fiber ◽  
In Situ Measurement

Simultaneous In Situ Measurement of Temperature and Relative Humidity in a PEMFC Using Optical Fiber Sensors

2010 ◽  
Vol 157 (8) ◽  
pp. B1173 ◽  
Author(s):  
N. A. David ◽  
P. M. Wild ◽  
J. Jensen ◽  
T. Navessin ◽  
N. Djilali
Keyword(s):  
Relative Humidity ◽  
Optical Fiber ◽  
Optical Fiber Sensors ◽  
In Situ Measurement ◽  
Fiber Sensors

In situ Near-IR Cure Monitoring of a Model Epoxy Matrix Composite

1996 ◽  
Vol 50 (7) ◽  
pp. 900-905 ◽  
Author(s):  
Sheryl Cossins ◽  
Mike Connell ◽  
Bill Cross ◽  
Robb Winter ◽  
Jon Kellar
Keyword(s):  
Refractive Index ◽  
Infrared Spectrum ◽  
Optical Fiber ◽  
Evanescent Wave ◽  
Near Infrared ◽  
Internal Reflection ◽  
Silica Optical Fiber ◽  
Lower Refractive Index ◽  
Near Infrared Spectrum

To improve the performance of composites it is imperative that the interphase region between the inorganic reinforcement and the polymer matrix be more completely understood. It is in this region that the stress transfer between the matrix and the reinforcement occurs. To this end, the curing of epoxy adjacent to an embedded silica optical fiber has been monitored in situ by evanescent wave spectroscopy. The epoxy studied is partially fluorinated and has a lower refractive index than the silica optical fiber. This combination of epoxy/silica served as a model composite system. The lower refractive index of the partially fluorinated epoxy allowed the silica optical fiber to be used as a waveguide for the internal reflection of near-infrared light. The epoxy curing was determined as a function of time and temperature by analysis of the near-infrared spectrum from the epoxy adjacent to the fiber obtained by the interaction of the evanescent wave that occurs at each internal reflection with the low-refractive-index epoxy. The results obtained from the examination of the near-infrared spectrum, particularly the disappearance of the NH2 stretching/bending combination band at ∼4925 cm−1 and the concomitant increase of the C–N overtone band at ∼4725 cm−1, showed that epoxy ring-opening and cross-linking reactions could be followed in real time. Finally, treatment of the fiber with a silane coupling agent had no observable effect on the curing reaction of the epoxy.

Temperature and wear analysis in function of the cutting tool coating when drilling of composite structure: In situ measurement by optical fiber

Wear ◽  
2017 ◽  
Vol 376-377 ◽  
pp. 1849-1858 ◽  
Author(s):  
Redouane Zitoune ◽  
Nicolas Cadorin ◽  
F. Collombet ◽  
Michal Šíma
Keyword(s):  
Optical Fiber ◽  
Composite Structure ◽  
Cutting Tool ◽  
In Situ Measurement ◽  
Wear Analysis ◽  
Tool Coating

Low-cost Robust Polymer Optical Fiber Temperature Sensor Based on FIR Method for in Situ Measurement

2015 ◽  
Vol 44 (4) ◽  
pp. 406003
Author(s):  
杜新超 DU Xin-chao ◽  
贺正权 HE Zheng-quan ◽  
林霄 LIN Xiao ◽  
周利斌 ZHOU Li-bin ◽  
胡宝文 HU Bao-wen ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Temperature Sensor ◽  
Low Cost ◽  
In Situ Measurement ◽  
Polymer Optical Fiber

Improved Protocol for the in Situ Measurement of Water Potential of Plants with a Thermocouple Psychrometer

2014 ◽  
Vol 48 (5) ◽  
pp. 531-539
Author(s):  
Zhu Jianjun ◽  
Bai Xinfu ◽  
Liu Linde
Keyword(s):  
Water Potential ◽  
In Situ Measurement ◽  
Thermocouple Psychrometer
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