Details

Autor(en) / Beteiligte

• Kim, G.H.
• Yang, J.
• Kulik, A.V.
• Sall, E.G.
• Chizhov, S.A.
• Yashin, V.E.
• Kang, U.

Titel

Power limitations and pulse distortions in an Yb : KGW chirped-pulse amplification laser system

Ist Teil von

• Quantum electronics (Woodbury, N.Y.), 2013-01, Vol.43 (8), p.725-730

Ort / Verlag

United States: Turpion Ltd and the Russian Academy of Sciences

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We have studied self-action effects (self-focusing and self-phase modulation) and stimulated Raman scattering in an Yb:KGW chirped-pulse amplification laser system. The results demonstrate that self-focusing in combination with thermal lensing may significantly limit the chirped pulse energy in this system (down to ) even at a relatively long pulse duration (). Nonlinear lenses in the laser crystals in combination with thermal lenses bring the regenerative amplifier cavity in the laser system to the instability zone and limit the average output power at pulse repetition rates under . Self-phase modulation, a manifestation of self-action, may significantly distort a recompressed femtosecond pulse at energies near the self-focusing threshold. Stimulated Raman scattering in such a laser has a weaker effect on output parameters than do self-focusing and thermal lensing, and Raman spectra are only observed in the case of pulse energy instability.