Abstract
We report evidence of strong lasing on the 4p-4s transition at 62.7 nm in nickel-like krypton occurring simultaneously with the usual 4d-4p lasing at 32.8 nm. The gain dynamics of both transitions were experimentally and numerically investigated and found comparable. The two-color amplifier was seeded by the same harmonic pulse, therefore producing a short-duration coherent two-color soft X-ray laser pulse. Both transitions offer similar prospects of pulse energy and duration and could lead to the delivery of intense and ultrashort two-color coherent soft X-ray pulses with a controllable delay.
| Original language | English |
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| Article number | 133902 |
| Journal | Physical Review Letters |
| Volume | 124 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 3 Apr 2020 |