Here, we report a fiber-optic point-based sensor to measure temperature and weight based on correlated specklegrams induced by spatial multimode interference. The device is realized simply by splicing a multimode fiber (MMF) to a single-mode fiber (SMF) with a core offset. A series of experiments demonstrates the approximately linear relation between the correlation coefficient and variation. Furthermore, we show the potential applications of the refractive index sensing of our device by disconnecting the splicing point of MMF and SMF. A modification of the algorithm in order to improve the sensitivity of the sensor is also discussed at the end of the paper.
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http://dx.doi.org/10.3390/s17102429 | DOI Listing |
Med Eng Phys
March 2024
SINTEF Digital, Department of Health Research, Trondheim, Norway; Norwegian National Research Centre for Minimally Invasive and Image-guided Diagnostics and Therapy, St. Olavs Hospital, Trondheim, Norway.
The purpose of this study was to evaluate the accuracy of a method for estimating the tip position of a fiber optic shape-sensing (FOSS) integrated instrument being inserted through a bronchoscope. A modified guidewire with a multicore optical fiber was inserted into the working channel of a custom-made catheter with three electromagnetic (EM) sensors. The displacement between the instruments was manually set, and a point-based method was applied to match the position of the EM sensors to corresponding points on the shape.
View Article and Find Full Text PDFSensors (Basel)
October 2017
College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
Here, we report a fiber-optic point-based sensor to measure temperature and weight based on correlated specklegrams induced by spatial multimode interference. The device is realized simply by splicing a multimode fiber (MMF) to a single-mode fiber (SMF) with a core offset. A series of experiments demonstrates the approximately linear relation between the correlation coefficient and variation.
View Article and Find Full Text PDFMed Image Comput Comput Assist Interv
December 2008
Department of Computing, Imperial College London.
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