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Fiber-optic Fabry-Perot sensors an introduction
Principles
Physics of Fabry-Perot Cavities
Principles of Fiber-Optic Fabry-Perot Interferometric (FFPI) Sensors
Two-Beam Interference
Three-Beam Interference
Multi-Beam Interference
References
Microstructures of ffpi sensors
Singlemode FFPI Structures
Intrinsic FFPI Sensors
IFFPI Structures Based on FBG Pairs
Fundamentals of FBG
Principle of IFFPIs Based on FBGs
IFFPI Structures Based on Reflective Films
IFFPI Structures Based on Air Holes
IFFPI Structures Based on Fusion Splicing of Different Kinds of Fibers
Asymmetric IFFPI Structures
Extrinsic FFPI Sensors
Capillary-Aligned EFFPI
EFFPI Based on Fiber End and Diaphragm
EFFPI Based on Microfabrication Technologies
EFFPI Based on Capillary or Hollow Fiber
EFFPI Based on Bubble
EFFPI Based on Reflective Film
EFFPI Based on Sensitive Film
Multimode FFPI Sensors
Hybrid FFPI Sensors
Intrinsic-Extrinsic Hybrid FFPIs
Hybrid FFPI with Other Fiber-Optic Structures
Microstructured FFPI Sensors
Photonic Crystal Fiber FFPIs
Microstructured Optical Fiber FFPIs
Microfiber or Tapered FFPIs
References
Fabrication Techniques for ffpi s ensors
Femtosecond Laser Micromachining
Open Notch FFP Sensor Fabricated by Femtosecond Laser
Sealed Fiber-Optic EFPI Fabricated by Femtosecond Laser
Intrinsic Fiber-Optic FPI Fabricated by Femtosecond Laser
Deep UV Laser Micromachining System
Direct Engraving of FFPI Strain Sensor on Silica Fibers
Self-Enclosed FFPI Strain, Pressure, Refractive Index, and Temperature Sensors
Sapphire FFPI Sensor
FIB Milling (Tapered Fibers)
Chemical Etching (Doped Fibers)
Strain Sensor Fabricated by Chemical Etching
Pressure Sensor Fabricated by Chemical Etching
Vibration Sensor Fabricated by Combination of Chemical Etching and FIB
Summary
References
Physical and Biochemical Sensors Based on FFPIs
Physical Sensors
Temperature Sensors
Strain, Displacement, and Force Sensors
Pressure Sensors
Acoustics and Ultrasonic Sensors
Electric- and Magnetic-Related Sensors
Biochemical Sensors
Refractive Index Sensors
Humidity Sensors
Gas Sensors
Other Types of Biochemical FFPI Sensors
Temperature-Insensitive or Temperature-Compensated Sensing
References
Interrogation and Multiplexing Techniques for ffp s ensors
Introduction
Intensity Interrogating Methods and Instruments
Single-Wavelength Intensity Interrogating Method and Instrument
Intensity Interrogating Method with Multiple Wavelengths
Spectral Interrogating for Absolute OPD Demodulation
Spectral Interrogation Based on Spectrometers
Spectral Interrogation Based on Tunable Filters
Spectral Interrogation Based on Swept or Tunable Lasers
Comparison of Different Spectral Interrogation Methods
OPD Demodulation Methods
OPD Demodulation Based on Spectrum Interrogation and Fourier Transform
OPD Demodulation Based on Interferometric Scanning in WLI
Comparison of OPD Demodulation Methods
Multiplexing Methods of FFP Sensors
Spatial Frequency-Division Multiplexing
Coarse Wavelength-Division Multiplexing
SFDM/CWDM of FFP Sensors
Time-Division Multiplexing
Multiplexing of FFP Sensors Based on Microwave-Assisted Reconstruction
Coherence Multiplexing Based on Interferometric Scanning WLI
Comparison of Multiplexing Methods
References
Applications
Structural Health Monitoring
Energy (Oil, Gas, Electricity)
Aerospace (Aircrafts, Engines)
Biomedicine
Other Applications
References
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