Advances in 2 µm polarization-maintaining thulium-doped Q-switched fiber lasers for frequency conversion into the mid-IR

Schneider, JulianJulianSchneiderForster, PatrickPatrickForsterRomano, ClémentClémentRomanoEichhorn, MarcMarcEichhornKieleck, ChristelleChristelleKieleck2022-03-142022-03-142021https://publica.fraunhofer.de/handle/publica/41136110.1117/12.2577118A diode-pumped actively Q-switched Tm3+-doped fiber laser is reported generating pulse energies of 800 µJ, pulse widths of 43 ns and peak powers of 17.5 kW. By using the single-oscillator as a pump source for nonlinear frequency conversion, mid-IR pulse energies of 230 µJ are extracted from a ZnGeP2 (ZGP) optical parametric oscillator (OPO).enQ-switched LaserThuliumfiber laserpolarization-maintainingZinc-Germanium-Phosphideoptical parametric oscillatorMid-IR Laser Source004670Advances in 2 µm polarization-maintaining thulium-doped Q-switched fiber lasers for frequency conversion into the mid-IRconference paper