Directly diode-pumped femtosecond Cr:ZnS amplifier with ultra-low intensity noise

Qu, Shizhen; Paudel, Arun; Sebesta, Aleksandar; Steinleitner, Philipp; Nagl, Nathalie; Poetzlberger, Markus; Pervak, Vladimir; Mak, Ka Fai und Weigel, Alexander (2022): Directly diode-pumped femtosecond Cr:ZnS amplifier with ultra-low intensity noise. In: Optics Letters, Bd. 47, Nr. 23: S. 6217-6220

Abstract

Diode-pumped Cr:ZnS oscillators have emerged as precursors for single-cycle infrared pulse generation with excellent noise performance. Herewe demonstrate a Cr:ZnSamplifier with direct diode-pumping to boost the output of an ultrafast Cr:ZnS oscillator with minimum added intensity noise. Seeded with a 0.66-W pulse train at 50-MHz repetition rate and 2.4 mu m center wavelength, the amplifier provides over 2.2 W of 35-fs pulses. Due to the low-noise performance of the laser pump diodes in the relevant frequency range, the amplifier output achieves a root mean square (RMS) intensity noise level of only 0.03% in the 10 Hz-1MHz frequency range and a long-term power stability of 0.13% RMS over one hour. The diode-pumped amplifier reported here is a promising driving source for nonlinear compression to the single- or sub-cycle regime, as well as for the generation of bright, multi-octave-spanning mid-infrared pulses for ultra-sensitive vibrational spectroscopy. (c) 2022 Optica Publishing Group

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