Abstract
Injection seeding of solid-target soft x-ray laser amplifiers with high harmonic pulses is shown to dramatically improve the far-field laser beam profile and reduce the beam divergence. Measurements and two-dimensional simulations for a 13.9 nm nickel-like Ag amplifier show that the amplified beam divergence depends strongly on the seed and can therefore be controlled by selecting the divergence of the seed. The near-field beam size of both the seeded and unseeded lasers is shown to be determined by the size of the gain region and the divergence of the amplified beams.
Original language | English |
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Pages (from-to) | 2317-2319 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 35 |
Issue number | 14 |
DOIs | |
State | Published - Jul 15 2010 |
Externally published | Yes |