D tosi om_efpi

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University of Limerick - Optical Metrology presentation - EFPI presentation

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D tosi om_efpi

  1. 1. Miniature Low-Cost Extrinsic Fabry-PerotInterferometer for Low-Pressure Detection[Optical Metrology, 2013]Sven Poeggel, Daniele Tosi, Gabriel Leen, Elfed LewisUniversity of Limerick, IrelandOptical Fibre Sensors Research Centre (OFSRC)
  2. 2. ProblemDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickIn-vivo pressure measurementHigh accuracy (1 mmHg or below)Minimum invasiveness (size, weight)Low-cost disposable probeImmunity to EMIFIBER-OPTIC
  3. 3. Extrinsic FPInterferometerDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI: Fiber-optic Fabry-Perot interferometric sensor based on all-silica glass structure: (1) launch fiber, (2) diaphragm, (3) capillary +FBGCapillaryLaunch SMfiberDiaphragmMM fiberAIR-GAPdLFiberBraggGrating(FBG)
  4. 4. EFPI/FBG spectrumDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickFBGλB = (Tλ 0) + 10.2 pm/°C ・ TΔEFPIL = -SΔ p P -1.6 nm/°CΔ ・ TΔ
  5. 5. Air-gap length LFP Spectrum ~ S0 + k cos[4πL/ ]λdDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI principleL
  6. 6. PressureAir-gap length L = L0 - Sp PΔFP Spectrum ~ S0 + k cos[4π(L - Sp PΔ )/ ]λTemperature: L = L0 - Sp P + SΔ T TΔ ⇒ FBGL0 - Sp PΔDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI principleL
  7. 7. FBG detectionFBG detectionEFPI/FBG systemASE sourceASE sourceSpectrometerSpectrometer1530-1600 nm1520-1596 nm CouplerCoupler3 dB1x4 switchServerServerEFPIEFPIEFPIEFPI+FBGDAQDAQ(LabVIEW)(LabVIEW) PressureTemperature}Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI detectionEFPI detectionProbeProbecalibrationcalibration
  8. 8. Performance chartUL EFPI/FBGSt. JudePressureWireOpsens OPP-MTechnologyFiber optic,EFPI/FBGGuidewire Fiber optic, EFPIDiameter 0.2 mm 0.35 mm 0.55 mmAccuracy 0.2 mmHg 2 mmHg 2 mmHgSpeed 100 Hz 25 Hz 20/250 HzStability 0.6 mmHg/hr >5 mmHg/hr 4.0 mmHg/hrTemperatureCompens.0.5°CNone NoneDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
  9. 9. Burette testDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickRMSE = 2.29 mmH2ORMSE = 1.30 mmH2O
  10. 10. Burette testDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickRMSE = 2.29 mmH2O == 0.21 mmHg
  11. 11. Long-term stabilityDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick0.63 mmHg2.76 mmHgTypical fiber optic drift ~ 5 mmHg/hr
  12. 12. Heart simulatorDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickHeart simulatorInterrogator/processingHeart pumpingSensor positioning(short access)EFPI spectrumPressure meas.SpectrometerASE sourceHeart pumpinginletFiber inlet
  13. 13. Heart simulatorDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickTime (s)Pressure (mmHg)
  14. 14. Ventricular assistDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickPolymer Core,Cleveland Clinic, USMar 2013FPI positioningVentricular assistReference (fluidic)Pressure readout
  15. 15. Ventricular assistDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
  16. 16. Ventricular assistDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickPressure (mmHg)Polymer Core,Cleveland Clinic, USMar 2013
  17. 17. Daniele Tosi - Optical Fibre Sensors Research Centre - project portfolio - UL2013UrodynamicsInterrogatorInterrogatorDifferential pressure measurementBladder outlet obstruction (BOO) diagnostic
  18. 18. Acknowledgments‣ Cleveland Clinic and Pointec Medical‣ FP7 Marie Curie (299985-PROBESENSE)‣ Science Foundation Ireland (RFP/ECE2898)‣ Enterprise Ireland (IP-2012-0166-Y)‣ University of Limerick, MSSI and CES depts.Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick

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