Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Guillaume Gorju"'
Long-wave infrared multi-wavelength optical source for standoff detection of chemical warfare agents
Autor:
Jean-Michel Melkonian, Jean-Baptiste Dherbecourt, Julie Armougom, Jiří Kadlčák, Myriam Raybaut, Guillaume Gorju, Antoine Godard, Nicolas Cézard, Riaan Stuart Coetzee, Valdas Pasiskevicius
Publikováno v:
Applied optics
Applied optics, Optical Society of America, 2020, 59 (35), pp.11156-11166. ⟨10.1364/AO.410053⟩
Applied optics, Optical Society of America, 2020, 59 (35), pp.11156-11166. ⟨10.1364/AO.410053⟩
We have designed and built a wavelength-tunable optical source for standoff detection of gaseous chemicals by differential absorption spectrometry in the long-wave infrared. It is based on a nanosecond 2 µm single-frequency optical parametric oscill
Publikováno v:
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX.
Laser shock surface treatment applications, ie with plasma formation, require pulses of very high peak power and duration of the order of a few tens of nanoseconds. This processing technique are generally performed in free space due to the difficulti
Autor:
Erwan Cadiou, Antoine Godard, Guillaume Gorju, Myriam Raybaut, Jacques Pelon, Jean-Baptiste Dherbecourt, Jean-Michel Melkonian
Publikováno v:
Laser Applications to Chemical, Security and Environmental Analysis in Proceedings of Applied Optics 2018
Laser Applications to Chemical, Security and Environmental Analysis in Proceedings of Applied Optics 2018, Jun 2018, Orlando, United States. ⟨10.1364/LACSEA.2018.LTu5C.5⟩
Laser Applications to Chemical, Security and Environmental Analysis in Proceedings of Applied Optics 2018, Jun 2018, Orlando, United States. ⟨10.1364/LACSEA.2018.LTu5C.5⟩
International audience; We report on the experimental demonstration of a direct detection differential absorption LIDAR for CO2, CH4, and H2O concentration measurement. It is based on a high energy parametric source tunable in the 2 µm region.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84fde81ecfbb6460efd21b2f21c3b034
https://hal-insu.archives-ouvertes.fr/insu-01834636
https://hal-insu.archives-ouvertes.fr/insu-01834636
Autor:
Valdas Pasiskevicius, Riaan Stuart Coetzee, J-B Dherbecourt, J.-M. Melkonian, Myriam Raybaut, Julie Armougom, Antoine Godard, J Kadlcak, Guillaume Gorju
Publikováno v:
MICS 2018
MICS 2018, Mar 2018, STRASBOURG, France. ⟨10.1364/MICS.2018.MM4C.7⟩
MICS 2018, Mar 2018, STRASBOURG, France. ⟨10.1364/MICS.2018.MM4C.7⟩
International audience; We report on the first single-frequency parametric source tunable in the longwave infrared with an output energy of 1 mJ. The source is then used in a lidar to detect chemicals in the vapor phase.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::615d7db60932b7e7e0ee1174f49715c1
https://hal.archives-ouvertes.fr/hal-02322064
https://hal.archives-ouvertes.fr/hal-02322064
Autor:
Jean-Michel Melkonian, Jacques Pelon, Antoine Godard, Erwan Cadiou, Myriam Raybaut, Guillaume Gorju, Jean-Baptiste Dherbecourt
Publikováno v:
EPJ Web of Conferences
EPJ Web of Conferences, EDP Sciences, 2018, (The 28th International Laser Radar Conference (ILRC 28), Bucharest 2017), 176, art. 05045 (4 p.). 〈10.1051/epjconf/201817605045〉
EPJ Web of Conferences, Vol 176, p 05045 (2018)
EPJ Web of Conferences, EDP Sciences, 2018, (The 28th International Laser Radar Conference (ILRC 28), Bucharest 2017), 176, art. 05045 (4 p.). ⟨10.1051/epjconf/201817605045⟩
EPJ Web of Conferences, EDP Sciences, 2018, (The 28th International Laser Radar Conference (ILRC 28), Bucharest 2017), 176, art. 05045 (4 p.). 〈10.1051/epjconf/201817605045〉
EPJ Web of Conferences, Vol 176, p 05045 (2018)
EPJ Web of Conferences, EDP Sciences, 2018, (The 28th International Laser Radar Conference (ILRC 28), Bucharest 2017), 176, art. 05045 (4 p.). ⟨10.1051/epjconf/201817605045⟩
International audience; We report on ground-based atmospheric concentration measurements of carbon dioxide, using a pulsed direct detection differential absorption lidar operating at 2051 nm. The transmitter is based on a tunable parametric source em
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5c827091947fae15965907a17e092b9
https://hal-insu.archives-ouvertes.fr/insu-01769225
https://hal-insu.archives-ouvertes.fr/insu-01769225
Autor:
Erwan, Cadiou, Dominique, Mammez, Jean-Baptiste, Dherbecourt, Guillaume, Gorju, Jacques, Pelon, Jean-Michel, Melkonian, Antoine, Godard, Myriam, Raybaut
Publikováno v:
Optics letters. 42(20)
We report on the capability of a direct detection differential absorption lidar (DIAL) for range resolved and integrated path (IPDIAL) remote sensing of CO
Autor:
Antoine Godard, Erwan Cadiou, Jean-Baptiste Dherbecourt, Dominique Mammez, Myriam Raybaut, Jacques Pelon, Guillaume Gorju, Jean-Michel Melkonian
Publikováno v:
Optics Letters
Optics Letters, 2017, 42 (20), pp.4044-4047. ⟨10.1364/OL.42.004044⟩
Optics Letters, Optical Society of America-OSA Publishing, 2017, 42 (20), pp.4044-4047. ⟨10.1364/OL.42.004044⟩
Optics Letters, 2017, 42 (20), pp.4044-4047. ⟨10.1364/OL.42.004044⟩
Optics Letters, Optical Society of America-OSA Publishing, 2017, 42 (20), pp.4044-4047. ⟨10.1364/OL.42.004044⟩
International audience; We report on the capability of a direct detection differential absorption lidar (DIAL) for range resolved and integrated path (IPDIAL) remote sensing of CO2 in the atmospheric boundary layer (ABL). The laser source is an ampli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff336b62e9db2efc62f4bcef01d64e73
https://hal.science/hal-01632637
https://hal.science/hal-01632637
Autor:
Antoine Godard, Jean-Michel Melkonian, Jean-Baptiste Dherbecourt, Erwan Cadiou, Dominique Mammez, Myriam Raybaut, Jacques Pelon, Michel Lefebvre, Guillaume Gorju
Publikováno v:
International Conference on Space Optics — ICSO 2016.
Several possible future spatial lidar missions (MERLIN EXCALIBUR ASCENDS) are intended to measure major greenhouse gases (CO2, H2O, CH4) in order to better understand their cycle and their impact on climate change.
Autor:
Delphine Descloux, Cyril Drag, Antoine Godard, Myriam Raybaut, Guillaume Gorju, Jean-Michel Melkonian, Guillaume Walter, Jean-Baptiste Dherbecourt
Publikováno v:
SPIE Proceedings.
We report on a widely tunable synchronously-pumped picosecond OPO combining an aperiodically poled MgOdoped LiNbO3 crystal as a broadband gain medium and an intracavity axially chirped volume Bragg (VBG). Owing to the high dispersion induced by the c
Autor:
Michel Lefebvre, Antoine Godard, Jean-Baptiste Dherbecourt, Erwan Cadiou, Julie Armougom, Myriam Raybaut, Jean-Michel Melkonian, Guillaume Gorju, Guillaume Aoust, Delphine Descloux, Guillaume Walter
Publikováno v:
SPIE Proceedings.
We present our activities on the development of narrow linewidth tunable optical parametric sources and their integration in gas sensing instruments. In particular, we have introduced the nested cavity optical parametric oscillator (NesCOPO) scheme t