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RSS FeedsSensors, Vol. 18, Pages 1825: Optical Fiber-Tip Sensors Based on In-Situ -Printed Polymer Suspended-Microbeams (Sensors)

 
 

13 june 2018 09:34:38

 
Sensors, Vol. 18, Pages 1825: Optical Fiber-Tip Sensors Based on In-Situ -Printed Polymer Suspended-Microbeams (Sensors)
 




Miniature optical fiber-tip sensors based on directly µ-printed polymer suspended-microbeams are presented. With an in-house optical 3D μ-printing technology, SU-8 suspended-microbeams are fabricated in situ to form Fabry–Pérot (FP) micro-interferometers on the end face of standard single-mode optical fiber. Optical reflection spectra of the fabricated FP micro-interferometers are measured and fast Fourier transform is applied to analyze the cavity of micro-interferometers. The applications of the optical fiber-tip sensors for refractive index (RI) sensing and pressure sensing, which showed 917.3 nm/RIU to RI change and 4.29 nm/MPa to pressure change, respectively, are demonstrated in the experiments. The sensors and their optical µ-printing method unveil a new strategy to integrate complicated microcomponents on optical fibers toward ‘lab-on-fiber’ devices and applications.


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65 viewsCategory: Chemistry, Physics
 
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