Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Øystein Farsund"'
Publikováno v:
IEEE Sensors Journal. 10:655-661
We have developed and tested a standoff biological aerosol detection demonstrator employing ultraviolet laser-induced fluorescence. It is based on commercially available components including a pulsed 355-nm laser and an intensified charge-coupled dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3a245616e44d0ce503309496e5b9c1f
https://doi.org/10.1109/jsen.2009.2037794
https://doi.org/10.1109/jsen.2009.2037794
Autor:
Øystein Farsund, Gunnar Rustad
Publikováno v:
Optics express. 21(17)
A new method to obtain a narrow and symmetrical far field from a high-pulse-energy optical parametric oscillator (OPO) with a linear resonator has been tested. The OPO employs two identical nonlinear crystals that are cut for type II phase matching,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ea4deb8de8a4a67d79b1b1d73cd627d
https://pubmed.ncbi.nlm.nih.gov/24105562
https://pubmed.ncbi.nlm.nih.gov/24105562
Autor:
Gunnar Rustad, Øystein Farsund
Publikováno v:
Advanced Solid-State Lasers Congress.
60 mJ signal pulse energy at 1.6 µm with M2 ~ 3.3 is obtained from a KTP-based OPO applying a simple linear resonator geometry with double-pass pumping and an achromatic half-wave plate.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05d589f89e5c1e569aff0c37e1769600
https://doi.org/10.1364/assl.2013.jth2a.52
https://doi.org/10.1364/assl.2013.jth2a.52
Autor:
Øystein Farsund, Gunnar Rustad
Publikováno v:
Journal of the European Optical Society: Rapid Publications. 6
Red pulses with >30 mJ energy and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a45d36d5d82cc611d9da27d1f1a4ebcb
https://doi.org/10.2971/jeos.2010.11058
https://doi.org/10.2971/jeos.2010.11058
Publikováno v:
SPIE Proceedings.
Nyhavn, Ragnhild; Moen, Hans Jonas Fossum; Farsund, Oystein; Rustad, Gunnar. Optimal classification of standoff bioaerosol measurements using evolutionary algorithms. Proceedings of SPIE, the International Society for Optical Engineering 2011 ;Volum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41ef87e4faac2aba9696e7ac3235e912
https://doi.org/10.1117/12.883919
https://doi.org/10.1117/12.883919
Publikováno v:
Optics express. 19(3)
Absorption at the idler wavelength in an optical parametric oscillator (OPO) is often considered detrimental. We show through simulations that pulsed OPOs with significant idler absorption can perform better than OPOs with low idler absorption both i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::faab536ace0986dea4ab1dca0c9e21e5
https://pubmed.ncbi.nlm.nih.gov/21369103
https://pubmed.ncbi.nlm.nih.gov/21369103
Publikováno v:
Advances in Optical Materials.
We show by simulations that idler absorption may improve the performance of pulsed high energy OPOs, and obtain high signal conversion efficiency and signal beam quality with idler absorption coefficients above 3 cm-1.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d1202279d3626da6dcfe9e527d580ae
https://doi.org/10.1364/assp.2011.awa25
https://doi.org/10.1364/assp.2011.awa25
Autor:
Øystein Farsund, Gunnar Rustad
Publikováno v:
International Journal of Optics, Vol 2011 (2011)
Sum-frequency generation of UV pulses exceeding 25 mJ and with beam quality has been demonstrated by mixing the third harmonic pulses of a flash lamp pumped 1.06 μm Nd:YAG laser with 1.7 μm pulses from an optical parametric oscillator pumped by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8f8e1b333e58635688d832a6489d731
Publikováno v:
Advances in Optical Materials.
A 295 nm nanosecond source with pulse energy exceeding 30 mJ and beam quality ~1 mm●mrad is demonstrated. A 1064 nm laser pumps an OPO whose signal beam is mixed with the laser’s third harmonic in a compact setup.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e18f09e93cb286198dfa3e84b074a79
https://doi.org/10.1364/assp.2011.atub15
https://doi.org/10.1364/assp.2011.atub15
Publikováno v:
Optics express. 18(9)
We demonstrate with simulations and experiments that an optical parametric oscillator using two different crystals with orthogonal walk-off planes can generate a symmetric, high-quality beam even if the resonator has a high Fresnel number. In the exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9762c8f9bb58fd4a6dc798751be1a89
https://pubmed.ncbi.nlm.nih.gov/20588770
https://pubmed.ncbi.nlm.nih.gov/20588770