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Continuously wavelength-tunable high harmonic generation via soliton dynamics
Optics Letters
|April 29, 2017
Summary
We generated tunable high harmonic generation using self-compressed laser pulses in a hollow-core fiber. This method allows continuous tuning of emission bands from 17 to 45 eV for advanced applications.
Area of Science:
- * Physics
- * Optics
- * Quantum Electronics
Background:
- * High harmonic generation (HHG) is a key process for producing extreme ultraviolet (XUV) and soft X-ray radiation.
- * Controlling the spectral properties of HHG is crucial for various applications, including spectroscopy and attosecond science.
- * Fiber-based pulse compression offers a compact and efficient way to generate intense ultrashort laser pulses.
Purpose of the Study:
- * To demonstrate a novel method for generating tunable high harmonics.
- * To investigate the influence of soliton dynamics in hollow-core fibers on HHG spectra.
- * To achieve continuous tunability of high harmonic emission bands.
Main Methods:
- * Utilized self-compression of laser pulses in a helium-filled hollow-core photonic crystal fiber via the soliton effect.
- * Employed a gas jet placed directly at the fiber output for high harmonic generation.
- * Varied laser pulse energy to observe changes in the generated harmonic spectra.
Main Results:
- * Successfully generated high harmonics in the gas jet pumped by self-compressed pulses.
- * Observed a direct transfer of the ionization-induced soliton blueshift to the high harmonics.
- * Achieved continuously tunable high harmonic emission bands spanning from 17 to 45 eV.
Conclusions:
- * Soliton dynamics in hollow-core fibers provide an effective mechanism for controlling HHG spectra.
- * The demonstrated method offers a flexible and compact source of tunable XUV radiation.
- * This technique opens new possibilities for applications requiring tunable coherent X-ray sources.
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