You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
10 August 1994Influence of the wavelength for infrared laser effects on metals and dielectrics
Rene C. Joeckle,1 Martin Schellhorn,2 Gerard Stern,3 Andre Sontag,4 Bernard Gautier1
1ISL (France) 2ISL French German Research Institute (France) 3Inst. Franco Allemand de Research (France) 4French-German Research Institute of Saint-Louis (France)
Two high power mid-IR gas lasers, the CO laser and the chemical HF laser, can offer higher absorption for metals and better focusing, i.e. smaller spot areas than CO2 and Nd:YAG lasers. A comparison of the effects of three gas lasers is carried out at the ISL, using three high-power gas lasers: 1 kW (HF), 6 kW (CO) and 7.5 kW (CO2) and allows to compare their effects on different materials. The absorptivity of these laser beams for several metals has been measured, both with low energy measurement techniques and with high power laser beams; an increase in absorptivity has been demonstrated for the short wavelengths lasers. Plexiglass irradiated with these lasers beams exhibits a boiling-type destruction behavior. The threshold fluence for the occurrence of the bubbles has been measured and compared with a simple boiling model showing the importance of the spectral absorption coefficient.
The alert did not successfully save. Please try again later.
Rene C. Joeckle, Martin Schellhorn, Gerard Stern, Andre Sontag, Bernard Gautier, "Influence of the wavelength for infrared laser effects on metals and dielectrics," Proc. SPIE 2097, Laser Applications, (10 August 1994); https://doi.org/10.1117/12.183137