Second-harmonic generation and self-phase modulation of few-cycle mid-infrared pulses

Chen, Bo-Han; Hofer, Christina; Pupeza, Ioachim und Baum, Peter (2019): Second-harmonic generation and self-phase modulation of few-cycle mid-infrared pulses. In: Optics Letters, Bd. 44, Nr. 16: S. 4079-4082

Abstract

Near-single-cycle mid-infrared pulses with a spectrum covering 5.4-11 mu mare efficiently frequency-doubled in different GaSe crystals. The second-harmonic spectrum spans 3-4.3 mu m at a power conversion efficiency of >20%. We measure an effective nonlinear coefficient of d(eff) approximate to 35 pm/V. We also report on self-phase modulation and spectral broadening of the mid-infrared pulses in various bulk materials and find an increase of 45% of spectral width for 5 mm of Ge. These results demonstrate that nonlinear optical conversions can efficiently be driven by few-cycle mid-infrared radiation. (C) 2019 Optical Society of America.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0146-9592
• Sprache: Englisch