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Journal Article

Intracavity gain shaping in millijoule-level, high gain Ho:YLF regenerative amplifiers


Krötz,  Peter
Centre for Free Electron Laser Science (CFEL), Deutsches Elektronen-Synchrotron (DESY) and Department of Physics, University of Hamburg, Notkestraße 85, 22607 Hamburg, Germany;
The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany;
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Murari, K., Cankaya, H., Krötz, P., Cirmi, G., Li, P., Ruehl, A., et al. (2016). Intracavity gain shaping in millijoule-level, high gain Ho:YLF regenerative amplifiers. Optics Letters, 41(6), 1114-1117. doi:10.1364/OL.41.001114.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-564D-7
We demonstrate intracavity gain shaping inside a 2 μm Ho:YLF regenerative amplifier with a spectral bandwidth of 2.9 nm broadened to 5.4 nm, corresponding to Fourier-limited pulses of 1 ps duration. The intracavity gain shaping is achieved by using a simple etalon, which acts as a frequency-selective filter. The output of the regenerative amplifier is amplified by a single-pass amplifier, and we achieve total energy of 2.2 mJ and pulse duration of 2.4 ps at 1 kHz with pulse fluctuations <1%. The amplifier chain is seeded by a home-built mode-locked holmium-doped fiber oscillator.