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Optical fiber
An optical fiber (or optical fibre) is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.
https://en.wikipedia.org/wiki/Optical_fiberTypical Optical fiber
Single Mode Fiber
Others
Types of Optical fiber
Photonic Crystal fiber (PCF)
Photonic-crystal fiber (PCF) is the state of the art new class of optical fiber based on the properties of photonic crystals.
https://en.wikipedia.org/wiki/Photonic-crystal_fiberTypes of PCF
PCF Sensors and their Application
PCF Temperature Sensor
PCF Strain Sensor
PCF Refractive Index Sensor
PCF Biosensor
Fiber optic sensor
A fiber optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors").
https://en.wikipedia.org/wiki/Fiber_optic_sensorFiber Bragg Gratings (FBG)
A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others.
https://en.wikipedia.org/wiki/Fiber_Bragg_gratingOperating Principle of FBG
FBG Sensors and Their Application
Long Period Gratings (LPG)
Operating Principle of LPG
LPG Sensors and Their Applications
Optical Time-Domain Reflectometer (OTDR) for Sensing
An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. An OTDR is the optical equivalent of an electronic time domain reflectometer.
https://en.wikipedia.org/wiki/Optical_time-domain_reflectometerPhase Sensitive Optical Time Domain Reflectometer (OTDR)
https://doi.org/10.1117/12.2267465
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