Results 71 to 80 of about 336 (99)
A Novel Approach to Raman Distributed Temperature-Sensing System for Short-Range Applications. [PDF]
Sensors (Basel)Pieracci A +3 more
europepmc +1 more source
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Coherent optical frequency domain reflectometry (OFDR) using a fiber grating external cavity laser
IEEE Photonics Technology Letters, 1994Recently fiber gratings have been applied to numerous applications in lightwave technology. We demonstrate a coherent optical frequency domain reflectometry (OFDR) using a fiber grating external cavity laser and coherent heterodyne detection. The fiber grating external cavity laser, which serves as the source, is very robust, compact, and free of ...
null Kao-Yang Huang, G.M. Carter
openaire +3 more sources
ODS 2020: Industrial Optical Devices and Systems, 2020
Monitoring carbon dioxide (CO2) for carbon capture, gas pipelines, and storage as well as early detection of CO2 leakage is important to mitigate greenhouse gas emissions and have a high atmospheric concentration for a long lifetime. Moreover, the main cause of the corrosion in natural gas pipelines is owed by CO2.
Nageswara R. Lalam +5 more
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Monitoring carbon dioxide (CO2) for carbon capture, gas pipelines, and storage as well as early detection of CO2 leakage is important to mitigate greenhouse gas emissions and have a high atmospheric concentration for a long lifetime. Moreover, the main cause of the corrosion in natural gas pipelines is owed by CO2.
Nageswara R. Lalam +5 more
openaire +1 more source
Optics Communications, 2010
Abstract We study the effects of the semiconductor laser noise on the generated beat signal, in Coherent Optical Domain Reflectometry device. By using a general laser noise analytical model, based on Volterra non-linear treatment of laser rate equations, we find a novel general expression of the beat photocurrent.
O. Boukari, L. Hassine, H. Bouchriha
openaire +1 more source
Abstract We study the effects of the semiconductor laser noise on the generated beat signal, in Coherent Optical Domain Reflectometry device. By using a general laser noise analytical model, based on Volterra non-linear treatment of laser rate equations, we find a novel general expression of the beat photocurrent.
O. Boukari, L. Hassine, H. Bouchriha
openaire +1 more source
Measurement Science and Technology, 2009
A soil-embedded optical fiber sensing cable is evaluated for an embedded cavity detection and sinkhole warning system in railway tunnels. Tests were performed on a decametric structure equipped with an embedded 110 m long fiber optic cable. Both Brillouin optical time-domain reflectometry (B-OTDR) and optical frequency-domain reflectometry (OFDR ...
Lanticq, Vincent +6 more
openaire +2 more sources
A soil-embedded optical fiber sensing cable is evaluated for an embedded cavity detection and sinkhole warning system in railway tunnels. Tests were performed on a decametric structure equipped with an embedded 110 m long fiber optic cable. Both Brillouin optical time-domain reflectometry (B-OTDR) and optical frequency-domain reflectometry (OFDR ...
Lanticq, Vincent +6 more
openaire +2 more sources