Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Philipp Rohwetter"'
Publikováno v:
Sensors, Vol 11, Iss 2, Pp 1620-1640 (2011)
A multiwavelength, multicomponent CRDS gas sensor operating on the basis of a compact photonic crystal fibre supercontinuum light source has been constructed. It features a simple design encompassing one radiation source, one cavity and one detection
Externí odkaz:
https://doaj.org/article/51961d5259704088a02c6cf944ab07f2
Publikováno v:
Journal of Lightwave Technology. 34:4437-4444
We present a demodulation method that partially compensates for the nonlinear and random transfer function of fiber-optic direct detection coherent Rayleigh optical time-domain reflectometry (C-OTDR). Specifically, the proposed method is shown to imp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::439249dc49f19613bb89a1f3f53b9407
https://doi.org/10.1109/jlt.2016.2557586
https://doi.org/10.1109/jlt.2016.2557586
Autor:
C.-L. Soulez, Stephan Kraft, Stefan Bock, A. Jochmann, Philipp Rohwetter, R. Sauerbrey, Ludger Wöste, Stefano Henin, Ulrich Schramm, Sarah Mauger, Jérôme Kasparian, Yannick Petit, Stefan Skupin, Luc Bergé, Kamil Stelmaszczyk, Jean-Pierre Wolf, Walter M. Nakaema
Publikováno v:
APPLIED PHYSICS B-LASERS AND OPTICS
Applied Physics B 100(2010), 77
Applied Physics. B, Lasers and Optics, Vol. 100, No 1 (2010) pp. 77-84
Applied Physics B 100(2010), 77
Applied Physics. B, Lasers and Optics, Vol. 100, No 1 (2010) pp. 77-84
We experimentally and numerically characterize multiple filamentation of laser pulses with incident intensities of a few TW/cm2. Propagating 100 TW laser pulses over 42 m in air, we observe a new propagation regime where the filament density saturate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::710746a372d2a1ef6fc73f9efba274ec
http://doc.rero.ch/record/316142/files/340_2010_Article_3941.pdf
http://doc.rero.ch/record/316142/files/340_2010_Article_3941.pdf
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 22:52-64
Partial discharge in polymeric insulation of high voltage equipment causes cumulative damage that progressively deteriorates the insulation, leading to eventual failure. The electrical detection of related discharge current pulses may be challenged b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6456c3c695964c91cb07827c487950ab
https://doi.org/10.1109/tdei.2014.004576
https://doi.org/10.1109/tdei.2014.004576
Publikováno v:
Procedia Engineering. 120:845-848
This paper reflects recent progress in the field of fluorescent polymer optical fiber sensors (F-POF) for partial discharge (PD) detection in high voltage (HV) cable accessories using optical-only PD detection by coincidence single photon counting. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88ecda222748948a80d1fc256c5c2f39
https://doi.org/10.1016/j.proeng.2015.08.711
https://doi.org/10.1016/j.proeng.2015.08.711
Publikováno v:
SPIE Proceedings.
We present a technique to overcome the random transfer function of fiber-optic direct detection coherent optical time-domain reflectometry (C-OTDR). For this purpose, a standard optical fiber was treated by UV light in order to introduce local strong
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b55c0399e596fad6926b1a236a2fbc0
https://doi.org/10.1117/12.2267659
https://doi.org/10.1117/12.2267659
Autor:
Kamil Stelmaszczyk, Manuel Queißer, Philipp Rohwetter, Tadeusz Stacewicz, Adam Czyzewski, Ludger Wöste, Martin Fechner
Publikováno v:
Applied Physics B. 94:369-373
We report on measurements performed with the broadband variant of Cavity Ring-Down Spectroscopy based on white-light Supercontinuum. Generated by filaments in a quartz block, the Supercontinuum was coupled into the stable optical cavity characterized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::264faa84bce8680cb9613c06c3f82b31
https://doi.org/10.1007/s00340-008-3320-z
https://doi.org/10.1007/s00340-008-3320-z
Publikováno v:
Optics Communications. 281:797-802
We investigated second harmonic generation (SHG) from neutral and electrically charged water microdroplets of uniform size. We found that angular distribution, polarization, and conversion efficiency of the SHG emission did not change within applied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b257ab54b37714da848fd9e2f74ca4c3
https://doi.org/10.1016/j.optcom.2007.10.036
https://doi.org/10.1016/j.optcom.2007.10.036
Publikováno v:
SPIE Proceedings.
We report on the successful application of distributed acoustic sensing (DAS) to the detection of partial discharge (PD). A detection limit of about 1 nC discharge magnitude was achieved for PD in a real-scale model of a high voltage termination. Ded
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc5169f6d0960277476623f264fec102
https://doi.org/10.1117/12.2194850
https://doi.org/10.1117/12.2194850
Publikováno v:
SPIE Proceedings.
We present recent progress in our development of fibre-optic sensors for the detection of partial discharge (PD) in silicone cable accessories, based on detecting related low-level optical emission. We experimentally show that the sensitive optical d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fca1ee50170b53af96f64a82d27f90f5
https://doi.org/10.1117/12.2194875
https://doi.org/10.1117/12.2194875