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19 February 2018 Generation of TW-scale mid-IR femtosecond pulses using a dual-chirped optical parametric amplification
Yuxi Fu, Kotaro Nishimura, Akira Suda, Katsumi Midorikawa, Eiji J. Takahashi
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Proceedings Volume 10522, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVIII; 1052210 (2018) https://doi.org/10.1117/12.2300727
Event: SPIE LASE, 2018, San Francisco, California, United States
Abstract
By using a dual-chirped optical parametric amplification (DC-OPA) scheme, we demonstrate high-energy infrared (IR) pulses with TW-scale peak power in the wavelength region of 1 ∼ 3.5 μm. In the central wavelengths between 1.2 ∼ 1.8 μm, we obtained over 100 mJ pulse energy. DC-OPA, which is an energy scalable method for an OPA process, can allow us to use a joule-class Ti:sapphire laser system for pumping an OPA. To the best of our knowledge, our DC-OPA laser is the first 100-mJ-class IR source with pulse duration of shorter than 100 fs. Additionally, to show the ability of our DC-OPA laser system, we demonstrate an energy-scaling strategy of high-order harmonic driven by a loosely focused 1.5 μm pulse. Using a 4-cm Ne gas cell with a 3.5-m laser focusing length, soft x-ray harmonics beyond 200 eV are clearly enhanced by a phase-matching effect.
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Yuxi Fu, Kotaro Nishimura, Akira Suda, Katsumi Midorikawa, and Eiji J. Takahashi "Generation of TW-scale mid-IR femtosecond pulses using a dual-chirped optical parametric amplification", Proc. SPIE 10522, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVIII, 1052210 (19 February 2018); https://doi.org/10.1117/12.2300727
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KEYWORDS
Laser systems engineering
Mid-IR
Attosecond phenomena
High power lasers
Ultrafast lasers
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