<div class="csl-bib-body">
<div class="csl-entry">Petrov, L., Georgiev, K., Velkov, D., Trifonov, A., Xu, X., Popmintchev, T., & Buchvarov, I. (2023). Multi-millijoule class, high repetition rate, Yb:CALYO regenerative amplifier with sub-130 fs pulses. <i>Optics Express</i>, <i>31</i>(12), 18765–18772. https://doi.org/10.1364/OE.487923</div>
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dc.identifier.issn
1094-4087
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/187526
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dc.description.abstract
We demonstrate a high-energy, 1 kilohertz, Yb-based, femtosecond regenerative amplifier in a chirped pulse amplification (CPA) architecture by using a single disordered Yb:CALYO crystal, providing 125 fs pulses of 2.3 mJ energy per pulse at a central wavelength of 1039 nm. The amplified compressed pulses, with a spectral bandwidth of 13.6 nm, represent the shortest ultrafast pulse duration reported to date for any multi-millijoule class,Yb-crystalline classical CPA system without additional spectral broadening techniques. We have demonstrated an increase in the gain bandwidth proportionally to the ratio of the excited to total Yb3+ ion densities. A net wider spectrum of the amplified pulses is the result of the interplay between the increased gain bandwidth and the gain narrowing. Finally, our broadest amplified spectrum of 16.6 nm, corresponding to a 96 fs transform limited pulse, can be expanded further to support sub-100 fs pulse durations and 1-10 mJ energies at 1 kHz.
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dc.description.sponsorship
Europäischer Forschungsrat (ERC)
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dc.language.iso
en
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dc.publisher
OPTICA PUBLISHING GROUP
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dc.relation.ispartof
Optics Express
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
regenerative amplifier
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dc.subject
chirped pulse amplification
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dc.subject
fiber-coupled InGaAs lasers
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dc.title
Multi-millijoule class, high repetition rate, Yb:CALYO regenerative amplifier with sub-130 fs pulses