Polarization shaping of a femtosecond Bessel beam to control birefringence writing in silica

Mostafa Hassan; Jiafeng Lu; Benjamin Sapaly; Matthieu Lancry; Francois Courvoisier

doi:10.1117/12.2621463

30 May 2022 Polarization shaping of a femtosecond Bessel beam to control birefringence writing in silica

Mostafa Hassan, Jiafeng Lu, Benjamin Sapaly, Matthieu Lancry, Francois Courvoisier

Proceedings Volume PC12142, Fiber Lasers and Glass Photonics: Materials through Applications III; PC1214209 (2022) https://doi.org/10.1117/12.2621463
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

We report the shaping of the polarization state of a femtosecond Bessel beam, which produces a high-intensity focus over a distance largely exceeding the Rayleigh range and less sensitive to Kerr effect than Gaussian beams. Here, we utilize a laser fabricated space variant half-waveplate based on well-designed nanograting distribution to create a Bessel beam exceeding 60 µm length with a helical polarization rotation from 0° to 180° along the propagating path. We use this beam to inscribe a high circular birefringence inscription in silica.

Conference Presentation

Citation Download Citation

Mostafa Hassan, Jiafeng Lu, Benjamin Sapaly, Matthieu Lancry, and Francois Courvoisier "Polarization shaping of a femtosecond Bessel beam to control birefringence writing in silica", Proc. SPIE PC12142, Fiber Lasers and Glass Photonics: Materials through Applications III, PC1214209 (30 May 2022); https://doi.org/10.1117/12.2621463

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