Traveling wave-pumping of ultra-short-pulse x-ray lasers

Richard A. Snavely, Luiz B. Da Silva, David C. Eder, Dennis L Matthews, Stephen J. Moon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


Pumping of proposed inner-shell photo-ionized (ISPI) x-ray lasers places stringent requirements on the optical pump source. We investigate these requirements for an example x-ray laser (XRL) in Carbon lasing on the 2p - 1s transition at 45 Å. Competing with this lasing transition is the very fast auger decay rate out of the upper lasing state, such that the x-ray laser would self-terminate on a femto-second time scale. XRL gain may be demonstrated if pump energy is delivered in a time short when compared to the auger rate. The fast self-termination also demands that we sequentially pump the length of the x-ray laser at the group velocity of the x- ray laser. This is the classical traveling wave requirement. It imposes a condition on the pumping source that the phase angle of the pump laser be precisely de-coupled from the pulse front angle. At high light intensities, this must be performed with a vacuum grating delay line. We also include a discussion of issues related to pump energy delivery, i.e. pulse-front curvature, temporal blurring and pulse fidelity. An all- reflective optical system with low aberration is investigated to see if it fulfills the requirements. It is expected that these designs together with new high energy (>1J) ultra-short pulse (<40 fs) pump lasers now under construction, may fulfill our pump energy conditions and produce a tabletop x-ray laser.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Number of pages5
StatePublished - 1997
Externally publishedYes
EventSoft X-Ray Lasers and Applications II - San Diego, CA, United States
Duration: Jul 28 1997Jul 28 1997


OtherSoft X-Ray Lasers and Applications II
Country/TerritoryUnited States
CitySan Diego, CA


  • Reflective optics
  • Ultra-short pulse
  • X-ray laser

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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