High flux coherent supercontinuum soft X-ray source driven by a single-stage 10 mJ, kHz, Ti:sapphire laser amplifier

Abstract

We demonstrate the highest flux tabletop source of coherent soft X-rays to date, driven by a single-stage 10 mJ Ti:sapphire regenerative amplifier at 1 kHz. We first down-convert the laser to 1.3 um using a parametric amplifier, before up-converting it to soft X-rays using high harmonic generation in a high-pressure, phase matched, hollow waveguide geometry. The resulting optimally phase matched broadband spectrum extends to 200 eV, with a soft X-ray photon flux of > 10^6 photons/pulse/1% bandwidth at 1 kHz, corresponding to > 10^9 photons/s/1% bandwidth, or approximately a three order-of-magnitude increase compared with past work. Finally, using this broad bandwidth X-ray source, we demonstrate X-ray absorption spectroscopy of multiple elements and transitions in molecules in a single spectrum, with a spectral resolution of 0.25 eV, and with the ability to resolve the near edge fine structure.

9 pages, 3 figures, under Optics Express peer review

References in corpus (8)

• Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers
• Phase-Matched Generation of Coherent Soft-X-Rays
• Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum
• Generation of Spatially Coherent Light at Extreme Ultraviolet Wavelengths
• Phase Matching of High-Order Harmonics in Hollow Waveguides
• Phase-Matching of High-Order Harmonics Driven by Mid- Infrared Light
• Generation of Bright Isolated Attosecond Soft X-Ray Pulses Driven by Multi-Cycle Mid-Infrared Lasers
• Quantum state-resolved probing of strong-field-ionized xenon atoms using femtosecond high-order harmonic transient absorption spectroscopy

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• Spatially homogeneous few-cycle compression of Yb lasers via all-solid-state free-space soliton management
• Efficient Coherent XUV Generation and Manipulation in Microfluidic Glass Devices
• Bright, polarization-tunable high repetition rate extreme ultraviolet beamline for coincidence electron-ion imaging
• Attosecond state-resolved carrier motion in quantum materials probed by soft X-ray XANES
• Time-resolving magnetic scattering on rare-earth ferrimagnets with a bright soft-X-ray high-harmonic source
• Table-top soft x-ray source for XAS experiments with photon energies up to 350 eV