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Farahbod A H, Roshan M, Pishdast M, Soleimani M, Nourian R. Experimental investigation of beam polarization on the spectral behavior of laser-induced copper plasma . ICOP & ICPET _ INPC _ ICOFS 2015; 21 :1089-1092
URL: http://opsi.ir/article-1-783-en.html
URL: http://opsi.ir/article-1-783-en.html
Abstract: (3782 Views)
In this paper, the spectral behavior of laser produced plasma of copper has been experimentally investigated . For this means, Nd:YAG laser beam with 28 ns pulse width at fundamental wavelength 1064 nm and different laser energy: 63 and 123 mJ has been used to produce laser induced plasma in vacuum and air atmosphere at pressures 2.5×10-4 mbar and 1000 mbar, respectively. The plasma radiations within visible spectrum have been analyzed by using a fast APD detector, fiber optics and 20 band pass filters with ~10 nm bandwidth at different wavelengths. Observations in air have been shown that the spectral behavior of plasma for >λ 600 nm depends on the polarization of the laser beam. The plasma emissions in vacuum for circularly polarized laser beam are increased respect to radiations in air under similar conditions.
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