Browsing Articles by Author "Holmen, Lars Grønmark"

Now showing items 1-6 of 6

    • 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 ...

    • 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. ...