117,442 research outputs found
Study of Brillouin optical time domain analysis fiber sensing with stabilized low-RIN pump-probe laser scheme
No full textBrillouin optical time domain analysis employing a doubly resonant short cavity fiber ring laser with active stabilization
No full textWe employ a new Brillouin ring laser (BRL) source based on an actively stabilized doubly resonant short cavity layout for Brillouin optical time-domain analysis (BOTDA) sensing. Compared to BRL designs that we have previously demonstrated, it presents improved SNR, narrow spectral linewidth and pump-probe frequency shift values with high temporal stability
Brillouin Optical Time Domain Analysis with Wavelength-locked Low-noise Pump-probe Laser Scheme
No full textA doubly resonant short cavity Brillouin ring-laser actively stabilized with a wavelength locking system are employed as a low-RIN pump-probe source for Brillouin optical time-domain analysis (BOTDA) sensing. The developed high-stability narrow-linewidth laser scheme is compared to a long-cavity ring laser, showing the potential for enhanced temperature-strain resolutions
Comparative in vitro activity of imipenem against gram-positive and gram-negative aerobic bacteria from clinical isolates
No full textStudy of enhanced performance fiber Brillouin ring laser with wavelength-locking for sensing applications
No full textWavelength-locked low-noise Brillouin ring laser for Brillouin sensing
No full textIn this work we expand the previous report on the performance of an enhanced version of a Brillouin ring laser (BRL) based on a short-cavity layout that is resonant for both pump and Brillouin signal and implementing an active heterodyne wavelength-locked technique for the tuning operation, which was compared with a previously demonstrated long-cavity (LC) (similar to 2 km) BRL pump-probe source. We provide a detailed analysis of the technique required to achieve double resonance, evaluate the relative intensity noise in the 0-50 kHz range (which is shown to still be below similar to-100 dB/Hz) and use the previous relative intensity noise comparison of the two sources to estimate the potential temperature/strain resolution improvement in BOTDA measurements
Narrow Linewidth Fiber Brillouin Ring Laser for Sensing Applications
No full textA novel tunable, stable and low-noise Brillouin ring laser layout composed of a doubly-resonant short-cavity Brillouin ring laser (DR-SC) paired with an active wavelength stabilization setup is presented in this work. Measurements of temporal signal stability, relative intensity noise, spectral linewidth and tunability range yielded a marked improvement over the long-cavity version that we have previously reported, making the new layout a promising alternative for applications in fiber sensing and other fields that require highly coherent and stable tunable sources
Influenza di N-acetilcisteina sulla produzione di biofilm e correlazione con l`antibiotico-resistenza in Stafilococchi coagulasi-negativi.
No full textN.D
Preliminary evaluation of a PCR protocol to directly detect Streptococcus equi ssp. zooepidemicus in equine specimens
No full textEnhanced performance short cavity Brillouin fiber ring laser for high-stability BOTDA sensing
No full textAn enhanced short cavity scheme for Brillouin sensing employing a Brillouin fiber ring laser has been studied, showing a good laser efficiency, a narrow full width half maximum of generated light and a low intensity noise up to 800 MHz, constituting a promising pump-probe source in BOTDA sensing
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