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

Shizhen Qu; Shizhen Qu; Shizhen Qu; Arun Paudel; Arun Paudel; Arun Paudel; Aleksandar Sebesta; Aleksandar Sebesta; Aleksandar Sebesta; Philipp Steinleitner; Nathalie Nagl; Nathalie Nagl; Markus Poetzlberger; Vladimir Pervak; Ka Fai Mak; Alexander Weigel; Alexander Weigel

doi:10.1364/OL.475438

Optics Letters
Vol. 47,
Issue 23,
pp. 6217-6220
(2022)
•https://doi.org/10.1364/OL.475438

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

Shizhen Qu, Arun Paudel, Aleksandar Sebesta, Philipp Steinleitner, Nathalie Nagl, Markus Poetzlberger, Vladimir Pervak, Ka Fai Mak, and Alexander Weigel

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Shizhen Qu, Arun Paudel, Aleksandar Sebesta, Philipp Steinleitner, Nathalie Nagl, Markus Poetzlberger, Vladimir Pervak, Ka Fai Mak, and Alexander Weigel, "Directly diode-pumped femtosecond Cr:ZnS amplifier with ultra-low intensity noise," Opt. Lett. 47, 6217-6220 (2022)

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Abstract

Diode-pumped Cr:ZnS oscillators have emerged as precursors for single-cycle infrared pulse generation with excellent noise performance. Here we demonstrate a Cr:ZnS amplifier 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 µm 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–1 MHz 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.

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Supplementary Material (1)

Name	Description
Supplement 1	supplemental document

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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