The convolutional PML for FDTD analysis: Transient electromagnetic absorption from DC to daylight

Accurate predictions of laser beam absorptance and how laser beam energy is distributed on a keyhole surface are arguably the most important but challenging tasks in the study of laser keyhole welding. In this article, laser interaction with fully penetrated keyholes has been studied by solving the Maxwell equations for electrodynamics using the finite-difference time-domain method with the Drude model for metals. Based on the experimental observations of Fabbro et al. [J. Phys. D: Appl. Phys. 38, 1881–1887 (2005)], the keyhole is simplified as a tilted cylinder, and we have extensively investigated laser absorption phenomena considering three materials (Fe, Sn, and Al), three beam polarizations (two linear and circular), two laser beam wavelengths (1.06 μm and 10.6 μm), and six keyhole tilting angles (0°, 10°, 20°, 30°, 40°, and 45°). To the best of the authors' knowledge, this is the first electrodynamic simulation of a laser manufacturing process and reveals some interesting findings concerning laser beam absorption characteristics that can be only obtained by full electrodynamic simulations.

show abstract

Estimation of the Bandwidth of Acceptable Crosstalk of Parallel Coupled Ring Resonator Add/Drop Filters

Mansoor

Sasse

Al-Asadi

et al. 2015

IEEE Trans. Electromagn. Compat.

View full text Add to dashboard Cite

The convolutional PML for FDTD analysis: Transient electromagnetic absorption from DC to daylight

Cited by 4 publications

References 3 publications

Pulsed laser deposition of refractive-index-graded broadband antireflection coatings for silicon solar cells

Pulsed laser deposition of refractive-index-graded broadband antireflection coatings for silicon solar cells

Finite-difference time-domain simulation of laser beam absorption in fully penetrated keyholes

Estimation of the Bandwidth of Acceptable Crosstalk of Parallel Coupled Ring Resonator Add/Drop Filters

Contact Info

Product

Resources

About