Browsing NTNU Open by Author "Richter, Roland Axel"
Now showing items 1-4 of 4
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Efficient high-energy Raman soliton generation in a Tm:doped large mode area fiber amplifier
Richter, Roland Axel; Tolstik, Nikolai; Sorokina, Irina T (Peer reviewed; Journal article, 2022)We report the Tm-doped all-fiber MOPA based on a LMA active fiber generating Raman solitons tunable in the range 1970-2300 nm directly from the LMA fiber. By tuning the chirp of the input pulse we reached more than 90 % ... -
Fine material processing using ultra-short pulsed 2 μm all-fiber lasers
Richter, Roland Axel (Doctoral theses at NTNU;2022:327, Doctoral thesis, 2022)Precision processing of silicon (Si) and other semiconductors is becoming increasingly important following the rising demand for semiconductor-based devices. Laser-assisted material processing on and below the surface can ... -
Flat-top supercontinuum and tunable femtosecond fiber laser sources at 1.9-2.5 μm
Klimentov, Dmitry; Tolstik, Nikolai; Dvoyrin, Vladislav V; Richter, Roland Axel; Sorokina, Irina T (Journal article; Peer reviewed, 2016)We report the high-energy flat-top supercontinuum covering the midinfrared wavelength range of 1.9-2.5 μm as well as electronically tunable femtosecond pulses between 1.98 and 2.22 μm directly from the thulium-doped fiber ... -
Investigation of Raman scattering phenomena in the development of mid-IR ultra-short laser pulses
Richter, Roland Axel (Master thesis, 2015)In this thesis both a raman spectrometer and a dispersion measurement setup for fibers was designed, built and automatized. Furthermore several nonlinear phenomena were researched and with two different approaches simulated. ...