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The effect of bandwidth on the absorption of laser plasma

Published online by Cambridge University Press:  09 March 2009

Tan Weihan
Affiliation:
Shanghai Institute of Optics and Fine Mechanics Academic Sinica, P.R.C.
Lin Zunqi
Affiliation:
Shanghai Institute of Optics and Fine Mechanics Academic Sinica, P.R.C.
Ding Liming
Affiliation:
Shanghai Institute of Optics and Fine Mechanics Academic Sinica, P.R.C.
Huang Guanlong
Affiliation:
Shanghai Institute of Optics and Fine Mechanics Academic Sinica, P.R.C.
Gu Min
Affiliation:
Shanghai Institute of Optics and Fine Mechanics Academic Sinica, P.R.C.
Yu Wenyan
Affiliation:
Shanghai Institute of Optics and Fine Mechanics Academic Sinica, P.R.C.
Deng Ximing
Affiliation:
Shanghai Institute of Optics and Fine Mechanics Academic Sinica, P.R.C.

Abstract

Both broad and narrow band Nd glass laser beams with energies 1 to 3 joules and pulse width 150 ps were used in aluminium plane target experiments at laser irradiances 1 to 3 × 10 14 W cm −2 on target surfaces. The incident laser beams were angled at 0°, 7·2°, 14·4°, 21·6°, 28·8°, 36°, 43·2° to the target surface normal and the polarization was perpendicular or parallel to the incident plane (s or p polarization). The experiments showed that the maximum resonance absorption occurred near to incident angles of about 9° to 10° and the broadband resonance absorption was slightly smaller than that of the narrowband. At large incident angles the broadband absorption was larger than that of the narrowband.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1985

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References

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