Browsing by Author "Fonnum, Helge"
Now showing items 1-7 of 7
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250-MHz synchronously pumped optical parametric oscillator at 2.25–2.6 μm and 4.1–4.9 μm
Coluccelli, Nicola; Fonnum, Helge; Haakestad, Magnus Willum; Gambetta, Alessio; Gatti, Davide; Marangoni, Marco; Laporta, Paolo; Galzerano, Gianluca (2012)A compact and versatile femtosecond mid-IR source is presented, based on an optical parametric oscillator (OPO) synchronously pumped by a commercial 250-MHz Er:fiber laser. The mid-IR spectrum can be tuned in the range ... -
High-pulse-energy mid-infrared fractional-image-rotation-enhancement ZnGeP2 optical parametric oscillator
Eichhorn, Marc; Schellhorn, Martin; Haakestad, Magnus W.; Fonnum, Helge; Lippert, Espen (2016)A high-energy mid-infrared ZnGeP 2 (ZGP) optical parametric oscillator (OPO) based on the nonplanar fractional-image-rotation enhancement resonator pumped by a 2.05 μm Ho 3+ :YLF laser is presented. Up to 120 mJ pulse ... -
Holmium-doped fiber amplifier for pumping a ZnGeP2optical parametric oscillator
Holmen, Lars Grønmark; Fonnum, Helge (2021-03-03)We present a holmium-doped all-fiber master oscillator power amplifier (MOPA) system operating at 2108 nm targeting optical frequency conversion applications. The MOPA delivers pulses of 0.52 mJ energy at 10 kHz repetition ... -
Laserstråling gjennom turbulent atmosfære Del 3 – eksperiment
Schiller, Andreas; Fonnum, Helge; Lippert, Espen (2023-11-13)Prosjektet "Laservåpen og beskyttelse" innenfor forskningsprogrammet "Luftvern, ubemannede luftsystemer og laser" går ut på å utvikle høyeffektlasere som mottiltak mot innkommende prosjektiler, droner og liknende. ... -
Mid-infrared source with 0.2 J pulse energy based on nonlinear conversion of Q-switched pulses in ZnGeP2
Haakestad, Magnus Willum; Fonnum, Helge; Lippert, Espen (2014)Mid-infrared (3–5 μm) pulses with high energy are produced using nonlinear conversion in a ZnGeP2-based master oscillator-power amplifier, pumped by a Q-switched cryogenic Ho:YLF oscillator. The master oscillator is based ... -
Optical turbulence on 1-km horizontal path with short and medium IR Gaussian laser beams
Schiller, Andreas Ulrich; Fonnum, Helge; Lippert, Espen (2023-10-19)We have investigated effects of optical turbulence on laser beams with wavelengths of λ = 1064 nm and 2036 nm. The two laser beams (one diode and one thulium fiber laser) were expanded to 7 cm diameter through a common ... -
Simulation System For Optical Science (SISYFOS) - tutorial
Arisholm, Gunnar; Fonnum, Helge (2012-10-31)Sisyfos is a program for simulation of optical parametric frequency conversion, lasers, and beam propagation in nonlinear or turbulent media. The main part of Sisyfos is a C++ library with classes corresponding to optical ...