Affiliation:
1. Sofia University
2. John Atanasoff Center for Bio and Nano Photonics (JAC BNP)
3. IBPhotonics Ltd.,
4. Jiangsu Normal University
5. University of California San Diego
6. Photonics Institute
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.
Funder
Horizon 2020 Framework Programme
Ministry of Education and Science
Alfred P. Sloan Foundation
Subject
Atomic and Molecular Physics, and Optics
Cited by
3 articles.
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