High-speed tunable FDML laser, interfaced to a continuous FPGA acquisition system, for FBG accelerometer interrogation
Résumé
In this study, we have developed a FDML laser characterized by a scanning frequency up to 100 kHz over a wide spectral range of several tens of nm at 1.55 μm. Traditionally, high speed FBG analyzers able to demultiplex arrays of Fiber Bragg Gratings do not process the data continuously. To overcome this limitation, our FDML laser has been interfaced with a continuous data acquisition system based on a 250 MS/s 4-channels FPGA board. This paper presents the main characteristics of this new optoelectronic interrogation system and the results obtained when scanning an FBG accelerometer at 20.3451 kHz and 61.053 kHz.
Mots clés
Bragg gratings
data acquisition
fibre lasers
fibre optic sensors
high-speed optical techniques
laser mode locking
high-speed tunable FDML laser
continuous FPGA acquisition system
FBG accelerometer interrogation
fiber Bragg gratings
data acquisition system
optoelectronic interrogation system
Fourier domain mode locking fiber laser
Accelerometers
Fiber gratings
Measurement by laser beam
Fiber lasers
Optical fibers
Tunable Laser
FDML laser
FBG
Optical Fiber Sensors
Continuous acquisition system
accelerometer