Energy efficiency of femtosecond laser ablation of refractory metals

Author： Loktionov E.   Ovchinnikov A.   Protasov Yu.   Sitnikov D.  

Publisher： Springer Publishing Company

ISSN： 0021-9037

Source： Journal of Applied Spectroscopy, Vol.77, Iss.4, 2010-09, pp. : 561-568

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Abstract

We present the results of an experimental study of the ablation energy thresholds and ablated mass for a number of refractory metals (Ti, Zr, Nb, Mo) by femtosecond (τ 0.5 = 45–70 fs) exposed to laser pulses in the ultraviolet — near infrared range (λ = 266, 400, 800 nm) under atmospheric conditions and under vacuum (p ~ 10–2 Pa). We have analyzed the ablation efficiency (mass yield per unit energy of the acting coherent radiation) and ablation energy thresholds vs. the laser pulse duration and photon energy.

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