Wavelength Shift Detection of Fiber Bragg Grating by Dynamic Strain using Serrodyne Modulation

Dynamic Strain Measurement Using Improved Bonding Fiber Bragg Grating

This study proposes an improved bonding method for attaching a fiber Bragg grating (FBG) on surface of a structure to measure its dynamic strains. The improved bonding fiber Bragg grating is called IBFBG for short in this study. The bonding method provides the chance to let the IBFBG and resistance strain gauge measure the longitudinal strain at the same point. This study use two steel cantilev...

WAVELENGTH MODULATION SPECTROSCOPIC CHEMICAL SENSING USING A PIEZO-ELECTRIC TUNABLE FIBER BRAGG GRATING LASER by

WAVELENGTH MODULATION SPECTROSCOPIC CHEMICAL SENSING USING A PIEZO-ELECTRIC TUNABLE FIBER BRAGG GRATING LASER Michael Buric, M.S. University of Pittsburgh, 2005 Real time gas sensing is paramount to numerous applications in industry as well as in the consumer sector. Many gas sensing applications such as fossil energy production require lowcost, multi-species sensors that are able to operate in...

Infrared Radiation Detection Using Fiber Bragg Grating

Piezo-electric tunable fiber Bragg grating diode laser for chemical sensing using wavelength modulation spectroscopy.

This paper demonstrates, for the first time to our best knowledge, the application of a tunable external-cavity fiber Bragg grating diode laser in spectroscopic chemical sensing. A tunable fiber Bragg grating external-cavity semiconductor laser is demonstrated with over 10 nm of tuning range. A piezo-actuator was implemented to stretch the grating for rapid wavelength tuning of the laser. The a...

Strain Measurement of Composite Laminates Using Fiber Bragg Grating Sensors

Fiber Bragg grating(FBG) sensors, one of the fiber optic sensors(FOS), based on the wavelength division multiplexing(WDM) technology are ideally suitable for structural health monitoring of composite materials and structures. Proper monitoring of measurands in FBG sensor systems requires accurate measurement of the Bragg center wavelength, and the ability to track rapid shifts of the wavelength...