Details

Autor(en) / Beteiligte

• Alekseev, S. V.
• Ivanov, M. V.
• Ivanov, N. G.
• Losev, V. F.

Titel

Influence of a Fundamental Frequency Pulse Chirp on the Spectral and Temporal Second-Harmonic Characteristics

Ist Teil von

• Russian physics journal, 2020-04, Vol.62 (12), p.2324-2329

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The results of investigation of the possibility of reducing the duration of the second-harmonic radiation pulse generated by the starting complex of an THL-100 laser system by conversion of a pre-chirped fundamental frequency pulse are presented. A front-end compressor of the complex is used to obtain a fundamental harmonic pulse chirp at a central wavelength of 950 nm with duration of 70 fs. It is shown that a small excess of the group velocity dispersion (±3200–4000 fs 2 ) of fundamental frequency radiation increases the width of the second-harmonic radiation spectrum by a factor of 1.5–2. A compensation for the excess dispersion of radiation pulses with broadened spectrum makes it possible to reduce the second-harmonic radiation pulse duration approximately proportionally to its spectral broadening and to obtain a minimal pulse duration of 35 fs.