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Wavelength dependence of aerosol-induced laser break­down thresholds

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Abstract

Measurements of aerosol-induced laser breakdown thresholds have been made for liquid droplets at four wavelengths using a pulsed Nd:YAG laser (λ = 1.06,0.53,0.35,0.26 μm). For droplets with a diameter around 50 μm, the threshold breakdown intensity decreases with decreasing wavelength. Thresholds are nearly in­dependent of droplet refractive index at the near-IR wavelength (λ =1.06 μm), but show increasing sensitivity to refractive index at shorter visible and ultraviolet wavelengths.

© 1986 Optical Society of America

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