Abstract

The scratches on the fiber end face can enhance the local electrical field, which lowers the damage threshold. The damage mechanism of a high-energy laser is investigated. The effect of scratches on the electric field is simulated by the finite difference time domain (FDTD) solution. The results show that the depth of the scratch has a greater ability to influence the electric field than the width, and multiple scratches have a stronger modulation than a single scratch. In calculation, the damage threshold of the scratch-free end face is $0.456\;{{\rm J/cm}^{2}}$ when the incident light electric field intensity is $50 \; {\rm MV/cm}$, compared to $0.345\;{{\rm J/cm}^{2}}$ in the presence of the scratch on the end face.

© 2023 Optica Publishing Group

Role of Cracks, Pores, and Absorbing Inclusions on Laser Induced Damage Threshold at Surfaces of Transparent Dielectrics

N. Bloembergen
Appl. Opt. 12(4) 661-664 (1973)

Femtosecond laser-induced damage threshold of nematic liquid crystals at 1030 nm

Loic Ramousse, Gilles Chériaux, Cyrille Claudet, and Aurélie Jullien
Appl. Opt. 60(26) 8050-8056 (2021)

Beam-size effects on the measurement of sub-picosecond intrinsic laser induced damage threshold of dielectric oxide coatings

Marek Stehlík, Frank Wagner, Janis Zideluns, Fabien Lemarchand, Julien Lumeau, and Laurent Gallais
Appl. Opt. 60(27) 8569-8578 (2021)

Enhanced laser-induced damage performance of all-glass metasurfaces for energetic pulsed laser applications

Nathan J. Ray, Jae-Hyuck Yoo, Hoang T. Nguyen, Mary Norton, David Cross, Christopher W. Carr, and Eyal Feigenbaum
Appl. Opt. 62(31) 8219-8223 (2023)

Laser-induced damage threshold of ZnGeP₂ crystal for (sub)picosecond 1-µm laser pulse

I. O. Kinyaevskiy, P. A. Danilov, S. I. Kudryashov, P. P. Pakholchuk, S. A. Ostrikov, N. N. Yudin, M. M. Zinovev, S. N. Podzyvalov, and Yu. M. Andreev
Appl. Opt. 62(1) 16-20 (2023)