Browsing Rapporter by Author "Rustad, Gunnar"
Now showing items 1-11 of 11
-
Beam shaping of high power laser diode bars
Rustad, Gunnar; Lippert, Espen; Stenersen, Knut (2001)A technique for reshaping the highly astigmatic beam from a high-power laser diode bar by use of two parallel mirrors is studied theoretically and experimentally. It is found that the output from the 1 µm x 1 cm laser ... -
Comparison of 294 nm and 355 nm excitation wavelengths in UVLIF standoff detection of biological aerosols released in a semi-closed chamber
Farsund, Øystein; Rustad, Gunnar; Skogan, Gunnar (2012-02-07)FFI has previously developed a lidar for standoff detection of biological aerosols based on ultraviolet laser induced fluorescence, using an excitation wavelength at 355 nm. A 294 nm laser source has been developed and ... -
Design of a high pulse energy coherent ultraviolet source - simulations and experimental design
Rustad, Gunnar; Farsund, Øystein (2013-02-01)The report discusses design considerations and numerical simulations of different system architectures for generation of several tens of mJ pulse energy in the ultraviolet range around 290- 300 nm. The architectures ... -
Mid-infrared optical parametric oscillators based on periodically-poled lithium niobate
Arisholm, Gunnar; Stenersen, Knut; Rustad, Gunnar; Lippert, Espen; Haakestad, Magnus (2002)A study has been conducted of mid-infrared optical parametric oscillators (OPOs) based on periodically poled lithium niobate (PPLN) as the nonlinear optical material. Experiments have been performed with a number of 1.06 ... -
A review of theory and materials for optical parametric oscillators in the infrared
Arisholm, Gunnar; Rustad, Gunnar (1997) -
Standoff detection of biological aerosols by means of UV-laser induced fluorescence : results from Umeå trial 2006
Farsund, Øystein; Rustad, Gunnar (2008)The objective of standoff detection is to enable early warning in case of a biological warfare agent attack. FFI has built a demonstrator employing ultraviolet laser induced fluorescence of biological aerosols. The field ... -
Standoff detection of biological aerosols by UV-laser induced fluorescence
Rustad, Gunnar; Farsund, Øystein (2008)Denne rapporten beskriver et eksperimentelt instrument som kalles biolidar og som er utviklet ved FFI i perioden 2005-2007. Biolidaren har som formål å oppdage aerosoler med biologisk innhold for å kunne gi tidlig oppdagelse ... -
Technologies for standoff detection of liquid warfare agents
Rustad, Gunnar (2011-10-20)The topic of this report is a review of technologies that can be used for standoff detection of chemical warfare agents in the liquid phase, with the aim to point out technologies that could be topic of a further study. ... -
Thermal effects in end-pumped solid state lasers - influence on resonator stability, beam quality, and output power
Stenersen, Knut; Lippert, Espen; Rustad, Gunnar; Arisholm, Gunnar (2001)A theoretical analysis is given of the magnitudes of thermal effects in end-pumped high-power solid state lasers, and their influence on the laser output characteristics, particularly the beam quality and conversion ... -
Vurdering av teknologier for avstandsdeteksjon av radiologisk materiale
Rustad, Gunnar (2009)Rapporten gir en oversikt over teknologier som kan brukes i jakten på radioaktivt materiale eller kjernevåpen som er utenfor deteksjonsavstanden til tradisjonelle detektorer som for eksempel geiger-tellere. Mulige ... -
ZnGep2-based optical parametric oscillator for µm generation
Arisholm, Gunnar; Lippert, Espen; Stenersen, Knut; Rustad, Gunnar; Nicolas, Stephane (2004)Operation of a ZnGeP2-based optical parametric oscillator (OPO) for generation of 8-11 μm radiation is studied. The primary source used to pump the OPO is a KTP-based OPO pumped by a Nd:YAG laser, giving up to 2 mJ pump ...