Mathematical modeling of two-photon thermal fields in laser–solid interaction

✍ Scribed by Mihai Oane; Dan Apostol

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 212 KB
• Volume: 36
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/j.optlastec.2003.08.010

✦ Synopsis

In this paper, we have developed an analytical model to study the temperature distributions in IR optical materials heated by laser pulses. Our model takes into account the two-photon absorption (TPA). The calculations are based on a three-dimensional model of heat di usion in solids using the integral transform method. We ÿnd out the rigorous analytical expression of the thermal ÿeld when one considers both one-and two-photon absorption. The model is valid for any laser-solid system whose interaction can be described by the generalized Beer-Lambert law. Speciÿc results are presented for an application of the model to ZnSe sample. We ÿnd out that TPA can produce detectable temperature variation.