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Optical Fiber Sensor Systems and their Application • Distributed Raman & Brillouin / OTDR fiber sensor systems FOS - 54
Distributed Fiber-Optic Sensor Systems • Principle: Optical Time Domain Reflectometry (OTDR) • Useable optical scattering processes: – RAMAN scattering R(T)=I a /I s =(λ s /λ a ) 4 exp(-hν/kT) → temperature – BRILLOUIN scattering ν B =2 n v A /λ → temperature, strain Local resolution: ∆L=c ∆t/2n ∆L=1m →∆t=10ns c – vacuum light velocity, n=1.5 (silica refractive index) Scattering spectrum of Ge-doped silica fiber (schematically) Raman scattering (Antistokes) ≈ ∆λ R ≈40nm (≈13THz) ≈ Rayleigh scattering Brillouin scattering ≈ ν B ≈12GHz Raman scattering (Stokes) λ FOS - 55
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Fachhochschule Jena Fachbereich ET/
Page 3 and 4: Komponenten faseroptischer Sensoren
Page 5 and 6: Mikromechanische Silizium-Komponent
Page 7 and 8: Advantages of Optical Fiber Sensors
Page 9 and 10: Basic Fiber Sensor Configurations S
Page 11 and 12: Optical Fiber Sensors: Measurands
Page 13 and 14: Optical Fiber Sensors: Basic Signal
Page 15 and 16: Principle of Reflective Displacemen
Page 17 and 18: Application: Medical In-vivo Brain
Page 19 and 20: Fiber-Optic Medical In-vivo Heart P
Page 21 and 22: Technical Micro-Bending Fiber-Optic
Page 23 and 24: Optical Fiber Sensor Systems and th
Page 25 and 26: Porous Transducer Layers on Fiber E
Page 27 and 28: T-sensitive Transducer Layers: Temp
Page 31 and 32: Schema: Fa. Asea Photolumineszenz-T
Page 33 and 34: Transmissivity UV Fiber Evanescent
Page 35 and 36: Fiber-Optic UV Absorption Sensing o
Page 37 and 38: Spectral In-situ Nutrient Analysis
Page 39 and 40: Laser Principle of Michelson Interf
Page 41 and 42: Application of Fiber-Optic Interfer
Page 43 and 44: Scheme of Fiber-Optic 3-Axes Seismi
Page 45 and 46: Seismic Sensing: Measurement Exampl
Page 47 and 48: Measurand: Extrinsic Fiber-Optic Fa
Page 49 and 50: Fiber-Optic Sagnac Interferometer G
Page 51 and 52: Bias stability < 1 °/h Noise < 10
Page 53: Polarimetrischer Stromsensor (Magne
Page 59 and 60: Talbot-Interferometer Beam splitter
Page 61 and 62: FBG Sensor System: Basic Configurat
Page 63 and 64: Optical Fiber Grating Sensor System
Page 65 and 66: Einsatzbeispiele faseroptischer Sen
Page 67 and 68: FBG Sensor Systems: Applications in
Page 69 and 70: Application of Fiber Grating Sensor
Page 71 and 72: Application of Fiber Grating Sensor
Page 73 and 74: Force [N] 600 400 200 0 Application
Page 75 and 76: Rock-bolt with fiberoptic strain se
Page 77 and 78: FBG Evanescent-Field Chemical Sensi
Page 81 and 82: absorbance [dBm -1 ] Photonic Cryst
Page 83 and 84: FBG Plasmon Biosensing Using Metall
Page 85 and 86: Optical Fiber Sensors: Applications
Page 87 and 88: Fiber Optic Sensor Market Developme
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