scholarly journals Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2402
Author(s):  
Christian-Alexander Bunge ◽  
Jan Kallweit ◽  
Levent Colakoglu ◽  
Thomas Gries
Keyword(s):  
Coupling Efficiency ◽  
Cross Coupling ◽  
Force Sensor ◽  
Optical Force ◽  
Optical Fibres ◽  
Optical Coupling ◽  
Light Coupling ◽  
Sensitivity Improvement ◽  
Coupling Point ◽  
Coupling Mechanisms

The force-enhanced light coupling between two optical fibres is investigated for the application in a pressure or force sensor, which can be arranged into arrays and integrated into textile surfaces. The optical coupling mechanisms such as the influence of the applied force, the losses at the coupling point and the angular alignment of the two fibres are studied experimentally and numerically. The results reveal that most of the losses occur at the deformation of the pump fibre. Only a small percentage of the cross-coupled light from the pump fibre is actually captured by the probe fibre. Thus, the coupling and therefore the sensor signal can be strongly increased by a proper crossing angle between the fibres, which lead to a coupling efficiency of 3%, a sensitivity improvement of more than 20 dB compared to the orthogonal alignment of the two fibres.

scholarly journals Optimization of the optical coupling in nanowire-based integrated photonic platforms by FDTD simulation

2018 ◽  
Vol 9 ◽  
pp. 2248-2254
Author(s):  
Nan Guan ◽  
Andrey Babichev ◽  
Martin Foldyna ◽  
Dmitry Denisov ◽  
François H Julien ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Coupling Efficiency ◽  
Fdtd Simulation ◽  
Geometrical Parameters ◽  
Optimized Design ◽  
Optical Coupling ◽  
Time Domain Simulation ◽  
Light Emitting ◽  
Light Coupling ◽  
Difference Time

The optimized design of a photonic platform based on a nanowire light emitting diode (LED) and a nanowire photodetector connected with a waveguide is proposed. The light coupling efficiency from the LED to the detector is optimized as a function of the geometrical parameters of the system using the finite difference time domain simulation tool Lumerical. Starting from a design reported in the literature with a coupling efficiency of only 8.7%, we propose an optimized photonic platform with efficiency reaching 65.5%.

High optical coupling efficiency quasi-vertical taper for polymer waveguide devices

2015 ◽  
Author(s):  
Zeyu Pan ◽  
Harish Subbaraman ◽  
Yi Zou ◽  
Xingyu Zhang ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Coupling Efficiency ◽  
Optical Coupling ◽  
Polymer Waveguide ◽  
Waveguide Devices ◽  
Optical Coupling Efficiency

scholarly journals Customizable Optical Force Sensor for Fast Prototyping and Cost-Effective Applications

Sensors ◽  
2018 ◽  
Vol 18 (2) ◽  
pp. 493 ◽  
Author(s):  
Jorge Díez ◽  
José Catalán ◽  
Andrea Blanco ◽  
José García-Perez ◽  
Francisco Badesa ◽  
...  
Keyword(s):  
Cost Effective ◽  
Force Sensor ◽  
Optical Force ◽  
Fast Prototyping

High-sensitive optical force sensor based on enhanced effective index modulation

Optik ◽  
2018 ◽  
Vol 168 ◽  
pp. 684-691
Author(s):  
Xiaolan Li ◽  
Yanxin Zhang ◽  
Weigang Zhang ◽  
TiEyi Yan ◽  
Yunshan Zhang
Keyword(s):  
Force Sensor ◽  
Effective Index ◽  
Optical Force ◽  
Index Modulation

scholarly journals Hand exoskeleton for rehabilitation therapies with integrated optical force sensor

2018 ◽  
Vol 10 (2) ◽  
pp. 168781401775388 ◽  
Author(s):  
Jorge A Díez ◽  
Andrea Blanco ◽  
José María Catalán ◽  
Francisco J Badesa ◽  
Luis Daniel Lledó ◽  
...  
Keyword(s):  
Force Sensor ◽  
Optical Force ◽  
Integrated Optical ◽  
Hand Exoskeleton

Impacts of SiO2 sidewall roughness on light coupling efficiency for silicon photonics ICs (Conference Presentation)

2018 ◽  
Author(s):  
Keizo Kinoshita ◽  
Tsuyoshi Horikawa ◽  
Masataka Noguchi ◽  
Takahiro Nakamura ◽  
Tohru Mogami
Keyword(s):  
Silicon Photonics ◽  
Coupling Efficiency ◽  
Sidewall Roughness ◽  
Light Coupling

Optical Force Sensor With Enhanced Resolution for MRI Guided Biopsy

2020 ◽  
Vol 20 (16) ◽  
pp. 9202-9208
Author(s):  
Dogangun Uzun ◽  
Okan Ulgen ◽  
Ozgur Kocaturk
Keyword(s):  
Force Sensor ◽  
Optical Force ◽  
Guided Biopsy ◽  
Enhanced Resolution ◽  
Mri Guided

scholarly journals Iron Pincer Complexes as Catalysts in Cross-coupling of Aryl Halides and Phenylboronic Acid

2018 ◽  
Vol 7 (4.5) ◽  
pp. 428
Author(s):  
Lolakshi Mahesh Kumar ◽  
Badekai Ramachandra Bhat
Keyword(s):  
Phenylboronic Acid ◽  
Coupling Efficiency ◽  
Cross Coupling ◽  
Pincer Complexes ◽  
Coupling Reactions ◽  
Alternative Approach ◽  
Active Metal ◽  
Phenyl Boronic Acid ◽  
Pcp Complexes ◽  
Coupling Yield

Pincer complexes with iron as active metal center were synthesized to study their catalytic activity in Suzuki-Miyaura coupling reactions. Tridentate pincer ligand was synthesized by the reaction of diphenylchlorophosphine with m-aminophenol and m-phenylenediamine respectively in a 2:1 ratio in the presence of triethylamine as a base and tetrahydrofuran as solvent media. The resultant ligand was complexed with FeSO4 to obtain PCP complexes, C-1 with O and N atoms in the side arms and C-2 with both N atoms in the side arms. The synthesized complexes were examined for their C-C coupling efficiency in cross-coupling between phenyl boronic acid and para substituted halobenzenes. The research study aims to provide an alternative approach to the Pd catalyzed cross coupling methods, an otherwise subjugated method to obtain cross-coupled products. Also the study implores on the effect of variation in the side arm atom relating to the donating ability of the ligand and thereby relatively affecting the coupling yield of the catalysts.  

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