Title :
Relative strength of second harmonic and 3/2 omega emissions from long-scale-length laser produced plasmas
Author :
Sinha, Binoy Kumar ; Kumbhare, Sudhakar Ramaji
Author_Institution :
Bhabha Atomic Res. Centre, Bombay, India
fDate :
6/1/1988 12:00:00 AM
Abstract :
Experiments were conducted on the planar slab targets of carbon, aluminum, and copper using a 1.0641- mu m laser at laser intensities varying from 2*10/sup 12/ to 1*10/sup 14/ W/cm/sup 2/. The laser had a fluorescent linewidth of 4.5 AA. Spectral profiles of parametrically modulated second-harmonic as well as 3/2 omega /sub 0/ emissions have been measured for the long-scale-length plasmas so generated. Relative strengths of these emissions with respect to peak signal intensity and spectral energy content as a function of laser intensity are graphically reported. Results are discussed on the basis of two plasmon and parametric decay instabilities.<>
Keywords :
aluminium; carbon; copper; light propagation in plasma; optical harmonic generation; plasma production and heating by laser beam; 1.0641 micron; 3/2 omega emissions; Al; C; Cu; fluorescent linewidth; laser intensities; long-scale-length laser produced plasmas; parametric decay instabilities; parametrically modulated second-harmonic; peak signal intensity; planar slab targets; plasmon instability; relative strength; second harmonic; spectral energy content; spectral profiles; Absorption; Carbon dioxide; Frequency; Laser excitation; Laser theory; Neodymium; Plasma measurements; Plasmons; Resonance; Slabs;
Journal_Title :
Quantum Electronics, IEEE Journal of
