Rundquist A, Durfee CG, Chang Z, Herne C, Backus S, Murnane MM, Kapteyn HC
Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI 48109-2099, USA.
Science. 1998 May 29;280(5368):1412-5. doi: 10.1126/science.280.5368.1412.
Phase-matched harmonic conversion of visible laser light into soft x-rays was demonstrated. The recently developed technique of guided-wave frequency conversion was used to upshift light from 800 nanometers to the range from 17 to 32 nanometers. This process increased the coherent x-ray output by factors of 10(2) to 10(3) compared to the non-phase-matched case. This source uses a small-scale (sub-millijoule) high repetition-rate laser and will enable a wide variety of new experimental investigations in linear and nonlinear x-ray science.
