Browsing by Author "Holmen, Lars Grønmark"
Now showing items 1-8 of 8
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Eye-safe fiber laser for long range 3D imaging applications
Holmen, Lars Grønmark; Rustad, Gunnar; Haakestad, Magnus W. (2018)We report an all-fiber Er/Yb master oscillator power amplifier at 1.55 μm, delivering 135 μJ pulses with 6 ns duration (full width at half-maximum) at 100 kHz pulse repetition frequency, limited by stimulated Brillouin ... -
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 ... -
Karakterisering av karbondisulfid (CS2) som optisk begrensermateriale på 2.05µm bølgelengde
Holmen, Lars Grønmark; Haakestad, Magnus (2014-10-20)Det er et behov for å beskytte elektrooptiske sensorsystemer mot laserpulser med høy energi. Ved å bruke et materiale med ulineær respons kan man lage en passiv innretning som transmitterer elektromagnetisk stråling med ... -
Oppvarming ved laserstråling – første forsøk med enkle konstruksjonsmaterialer
Schiller, Andreas; Holmen, Lars Grønmark (2024-02-15)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. Denne ... -
Optical limiting properties and z-scan measurements of carbon disulfide at 2.05 μm wavelength
Holmen, Lars Grønmark; Haakestad, Magnus W. (2016)Nonlinear and optical limiting properties of carbon disulfide (CS 2 ) are characterized at 2.05 μm wavelength using a 𝑄 -switched Ho:YLF laser with high pulse energy. The nonlinear refractive index of CS 2 is measured ... -
Optical limiting properties of carbon disulfide at 2.05μm wavelength
Holmen, Lars Grønmark; Haakestad, Magnus W. (2016)Several types of infrared sensors are based on sensitive focal plane arrays. In such sensors, the intensity will typically increase by a factor ~107 at the focal plane, compared to the intensity of the incoming radiation. ... -
Robust eye-safe pulsed fiber laser source for 3D ladar applications
Holmen, Lars Grønmark; Rustad, Gunnar; Haakestad, Magnus W. (2017)We present a pulsed all-fiber Er/Yb-doped master oscillator power amplifier at 1.55 μm wavelength. In a simple two-stage amplifier design, the source delivers 140 μJ pulses at 25 kHz and 50 kHz pulse repetition frequency, ... -
Tunable holmium-doped fiber laser with multiwatt operation from 2025 nm to 2200 nm
Holmen, Lars Grønmark; Shardlow, Peter C; Barua, Pranabesh; Sahu, Jayanta K; Simakov, Nikita; Hemming, Alexander; Andrew Clarkson, W (2019-11-18)The emission band of holmium-doped silica fibers extends beyond 2200 nm, which means these lasers have the potential of covering considerable parts of the atmospheric transmission window between ∼2100 nm and 2250 nm. ...