Fiber Optic Bragg-Grating Sensors
ثبت نشده
چکیده
In-fibre Bragg gratings are sensor elements which are photo-written into optical fibre using intense ultra-violet laser beams and have the potential for the measurement of strain/deformation and temperature with applications reported including monitoring of highways, bridges, aerospace components and in chemical and biological sensors. The development of a fiber Bragg grating (FBG) measuring system plays a significant role in monitoring and recording the actual seismic responses of underground structures, rock mass and bridges etc.
منابع مشابه
Multi-Stress Monitoring System with Fiber-Optic Mandrels and Fiber Bragg Grating Sensors in a Sagnac Loop
Fiber Bragg grating sensors are placed in a fiber-optic Sagnac loop to combine the grating temperature sensors and the fiber-optic mandrel acoustic emission sensors in single optical circuit. A wavelength-scanning fiber-optic laser is used as a common light source for both sensors. A fiber-optic attenuator is placed at a specific position in the Sagnac loop in order to separate buried Bragg wav...
متن کاملUltra High Resolution OSA for Characterizing and interrogating Fiber Bragg Grating Sensors Introduction to Fiber Optic Sensors
متن کامل
Dual temperature and strain measurement with the combined fluorescence lifetime and Bragg wavelength shift approach in doped optical fiber.
We have constructed fiber-optic sensors to measure temperature and strain by combining the properties of fiber Bragg gratings with the fluorescent lifetimes of various doped fibers. Sensors have been made with the fiber Bragg grating written directly into the doped fiber to ensure the collocation of the strain and temperature measurement points. Results are compared with those obtained previous...
متن کاملStudy of Optical Fiber Sensors for Cryogenic Temperature Measurements
In this work, the performance of five different fiber optic sensors at cryogenic temperatures has been analyzed. A photonic crystal fiber Fabry-Pérot interferometer, two Sagnac interferometers, a commercial fiber Bragg grating (FBG), and a π-phase shifted fiber Bragg grating interrogated in a random distributed feedback fiber laser have been studied. Their sensitivities and resolutions as senso...
متن کاملImplementation and characterization of polarimetric heterodyning fiber grating laser sensors
In this paper, we briefly review our recent work on polarimetric heterodyning fiber grating laser sensors, including the characterization, implementation, and multiplexing of the polarimetric sensors. OCIS codes: (060.2370) Fiber optics sensors; (060.2840) Heterodyne; (060.3510) Lasers, fiber; (060.3735) Fiber Bragg gratings.
متن کامل