Plasma ultraviolet source for short-wavelength lasers. Final report, 15 January 1986-29 February 1988

Technical Report · Fri Apr 15 04:00:00 EDT 1988

OSTI ID:6960518

Han, K S

A dense plasma focus (DPF) device was evaluated for the feasibility of blue-green and near-ultraviolet laser pumping. As the result of optimizing the operating conditions of DPF and laser system, the maximum untuned laser output exceeded 4.0 mJ corresponding to the energy density 8.3 J/liter which is much higher than the typical flashlamp dye laser. The spectral irradiance of DPF at the absorption bands for LD390 and LD490 were 5.5 W/sq cm-nm, 0.3 W.sq cm-nm, respectively. Due to the lower pump power of DPF at 355 nm than the threshold of LD390, the laser pumping of LD390 dye was not achieved. A hard-core flashlamp (HCF) which has a coaxial geometry and array of inverse pinches was also evaluated for blue-green and near uv laser excitation. The short pulse (>0.5us) surface discharges were produced across the core insulator of alumina. The spectral irradiance of the HCF depends on argon fill-gas pressure and the core insulating material. The maximum radiative output of the HCF lie in the region of 340-400 nm (absorption band of LD490). A LD490 dye laser pumped by a HCF prototype device had an output of 0.9 mJ with a pulse of 0.5 microsec (full width at half maximum).

• Research Organization: Hampton Univ., VA (USA). Dept. of Physics
• OSTI ID: 6960518
• Report Number(s): AD-A-192844/9/XAB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ABSORPTION SPECTRA
DENSITY
DOCUMENT TYPES
DYE LASERS
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FEASIBILITY STUDIES
FOCUSING
GEOMETRY
LASERS
LIQUID LASERS
MATERIALS
MATHEMATICS
NEAR ULTRAVIOLET RADIATION
OPEN PLASMA DEVICES
PHYSICAL PROPERTIES
PLASMA FOCUS DEVICES
PROGRESS REPORT
PUMPING
RADIATIONS
SPECTRA
SURFACES
THERMONUCLEAR DEVICES
ULTRAVIOLET RADIATION