Enhanced terahertz (THz) generation in the organic crystal DSTMS is achieved using near-infrared pulses obtained via Raman shifting in a nitrogen gas-filled hollow-core fiber, which allows continuous wavelength tuning. Pumping DSTMS with 73 fs pulses at 1.45 µm yields a conversion efficiency exceeding 1%. Compared to direct pumping with a Yb amplifier at 1030 nm, the Raman-shifted pulses result in a higher efficiency and a broader THz spectrum, due to an improved phase matching condition.
Enhanced THz Generation in DSTMS via Raman Shifted Yb-Laser Pump Pulses using a Nitrogen Gas-Filled Hollow Core Fiber
Piccoli, Riccardo;
2025
Abstract
Enhanced terahertz (THz) generation in the organic crystal DSTMS is achieved using near-infrared pulses obtained via Raman shifting in a nitrogen gas-filled hollow-core fiber, which allows continuous wavelength tuning. Pumping DSTMS with 73 fs pulses at 1.45 µm yields a conversion efficiency exceeding 1%. Compared to direct pumping with a Yb amplifier at 1030 nm, the Raman-shifted pulses result in a higher efficiency and a broader THz spectrum, due to an improved phase matching condition.
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