Laser etched gratings inside microstructured optical fibres

Konstantaki, Maria; Tsibidis, George D.; Childs, Paul; Sozzi, Michele; Pissadakis, Stavros

doi:10.1051/matecconf/20130805001

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2016

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“…There are preceding studies on LIBWE employing a two-beam interferometric irradiation, where they called this technique 'twin LIBWE' [12,[17][18][19][20]. Fabrication by an interferometric irradiation was also studied by using a phase mask technique for producing relief gratings in photonic crystal fibres [21]. However, these methods cannot be applied to the beam-scanning system for marking because two separate optical paths or direct contact of a phase mask are necessary.…”

Section: Introductionmentioning

confidence: 99%

Laser marking on soda-lime glass by laser-induced backside wet etching with two-beam interference

Nakazumi¹,

Sato²,

Narazaki³

et al. 2016

J. Micromech. Microeng.

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For crack-free marking of glass materials, a beam-scanning laser-induced backside wet etching (LIBWE) process by a beam spot with a fine periodic structure was examined. The fine periodic structure was produced within a beam spot by means of a Mach-Zehnder interferometer incorporated to the optical setup for the beam-scanning LIBWE. A fine structure with a period of 9 µm was observed within the microstructures with a diameter of ca. 40 µm fabricated by a laser shot under double-beam irradiation, and they could be homogeneously fabricated within an area of 800 × 800 µm. The area filled with the microstructures, including fine periodic structures, could be observed in high contrast under a diffuse, on-axis illumination that was used in commercial QR code readers.

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