Title :
High-speed tunable FDML laser, interfaced to a continuous FPGA acquisition system, for FBG accelerometer interrogation
Author :
Ben Abdallah, Mourad Alexandre ; Laffont, Guillaume ; Roussel, Nicolas ; Ferdinand, Pierre
Author_Institution :
Opt. Meas. Lab., CEA, Gif-sur-Yvette, France
Abstract :
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.
Keywords :
Bragg gratings; accelerometers; data acquisition; fibre lasers; fibre optic sensors; high-speed optical techniques; laser mode locking; FBG accelerometer interrogation; Fourier domain mode locking fiber laser; continuous FPGA acquisition system; data acquisition system; fiber Bragg gratings; frequency 20.3451 kHz; frequency 61.053 kHz; high-speed tunable FDML laser; optoelectronic interrogation system; wavelength 1.55 mum; Accelerometers; Fiber gratings; Fiber lasers; Measurement by laser beam; Optical fiber sensors; Optical fibers; Continuous acquisition system; FBG; FDML laser; Optical Fiber Sensors; Tunable Laser; accelerometer;
Conference_Titel :
SENSORS, 2014 IEEE
Conference_Location :
Valencia
DOI :
10.1109/ICSENS.2014.6984924
