Saturated and near-diffraction-limited operation of an XUV laser at 23.6 nm
Physical Review Letters 68:19 (1992) 2917-2920
Abstract:
Amplification of spontaneous emission (ASE) at 23.6 nm has been studied in a Ge plasma heated by a 1 TW infrared laser pulse. The exponent of the axial gain reached 21 in a geometry with Fresnel number 1. Two plasma columns of combined length up to 36 mm were used with an extreme ultraviolet mirror giving double-pass amplification. Saturation of the ASE output was observed. The beam divergence was about 8× diffraction limited with a brightness estimated at 1014 W cm-2 sr-1. The feedback from the mirror was significantly reduced probably by radiation damage from the plasma. © 1992 The American Physical Society.COLLISION PUMPED SOFT-X-RAY LASERS - PROGRESS AT RAL
INSTITUTE OF PHYSICS CONFERENCE SERIES (1992) 23-30
Recombination XUV Lasers Driven by Low Energy Picosecond Pulses from a High Brightness KrF Raman Laser
Optica Publishing Group (1992) tuc24
Experiments with 'SPRITE' 12 ps facility
Proceedings of SPIE - The International Society for Optical Engineering 1413 (1991) 70-76
Abstract:
Lateral and axial thermal energy transport in laser-plasma interactions has been studied using a short (12 psec) pre-pulse free KrF pumped Raman laser pulse (λ = 268 nm) of low beam divergence. A new method of producing narrow line foci using random phase plates was employed to study the plasma conditions required to generate high gain, short wavelength recombination X-ray lasers. In addition, the laser energy was focused into a small focal spot (8 μm) for higher intensity (1-2 × 1017 cm-2) interaction studies.High-density compression experiments at ile, Osaka
Laser and Particle Beams 9:2 (1991) 193-207