Abstract
The temporal coherence of an injection-seeded transient 18.9 nm molybdenum soft x-ray laser was measured using a wavefront division interferometer and compared to model simulations. The seeded laser is found to have a coherence time similar to that of the unseeded amplifier, ~1 ps, but a significantly larger degree of temporal coherence. The measured coherence time for the unseeded amplifier is only a small fraction of the pulsewidth, while in the case of the seeded laser it approaches full temporal coherence. The measurements confirm that the bandwidth of the solid target amplifiers is significantly wider than that of soft x-ray lasers that use gaseous targets, an advantage for the development of sub-picosecond soft x-ray lasers.
Highlights
Temporal coherence and spectral linewidth of an injection-seeded transient collisional soft x-ray laser
In this paper we report the first measurement of the temporal coherence and spectral width of a transient solid-target soft X-ray lasers (SXRL) injection-seeded by high-order harmonic (HH) pulses
The variation of the linewidth of the seeded and amplified spontaneous emission (ASE) lasers as a function of amplifier length was simulated using the combination of a 2-dimensional hydrodynamic/atomic physics code and a 3-dimensional ray propagation code developed at Colorado State University (CSU)
Summary
Temporal coherence and spectral linewidth of an injection-seeded transient collisional soft x-ray laser. Abstract: The temporal coherence of an injection-seeded transient 18.9 nm molybdenum soft x-ray laser was measured using a wavefront division interferometer and compared to model simulations.
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