Determination of the absorption length of CO2, Nd:YAG and high power diode laser radiation for a selected grouting material

Abstract

The laser beam absorption lengths of CO 2 , Nd:YAG and a high power diode laser (HPDL) radiation for a newly developed SiO 2 /Al 2 O 3 -based tile grout have been determined through the application of Beer-Lambert's law. The findings revealed marked differences in the absorption lengths despite the material having similar beam absorption coefficients for the lasers. The absorption lengths for the SiO 2 /Al 2 O 3 -based tile grout for CO 2 , Nd:YAG and HPDL radiation were calculated as being 232±11 µm, 193±4 µm and 183±8 µm respectively. Moreover, this method of laser beam absorption length determination, which has hitherto been used predominantly with lasers operated in the pulsed mode, is shown to be valid for use with lasers operated in the continuous wave (CW) mode, depending upon the material being treated.

Laser Ablation

“…ffiffiffiffiffiffi ffi a s t p [38] Usually, if the corresponding physical properties of the target and technique parameters are given, one can directly solve the heat conduction equation by analytical or numerical methods to obtain accurate results of target temperature at different times and positions, and the evolution of the dynamic interface. This research method for LPLA is quite universal.…”

“…For most ceramic materials with a low reflectivity for infrared lasers, CO 2 laser is a good candidate for ceramic drilling (37,38). Lawrence et al confirmed that for CO 2 laser, the absorption length for Al 2 O 3 /SiO 2 -based refractory material is three orders of magnitude greater than most of metals (38,40). Unlike most metals, the polymer materials under laser irradiation can produce a deeper thermal penetration.…”

Manufacturing Process Optimization via Digital Twins: Definitions and Limitations

“…An example would be Beer-Lambert penetration of photons due to material-laser combination (i.e. CO 2 of 10.6um wavelength vs. SiO 2 /Al 2 O 3 material [20]) or due to scattering in powder [21].…”

A review of incorporating Nd:YAG laser cleaning principal in automotive industry

“…Coating removal mechanism begins after the absorption of laser intensity to the coating layers has exceeded the ablation threshold of the coated material (Metsios, Dai, Chard, McComb, & Kwon, 2018;Poprawe, 2011;Targowski et al, 2009). This can be described by the Beer -Lambert absorption law, as given in Equation ( 9) (Kumar et al, 2012;Lawrence, Minami, Li, Edwards, & Gale, 2002;Schmidt et al, 2003).…”