Ultrashort pulse inscribed fiber Bragg gratings with controlled apodisation profiles

Ria G. Krämer; Christian P. Schmittner; Malte P. Siems; Tobias Ullsperger; Thorsten A. Goebel; Daniel Richter; Stefan Nolte

doi:10.1117/12.2649952

17 March 2023 Ultrashort pulse inscribed fiber Bragg gratings with controlled apodisation profiles

Ria G. Krämer, Christian P. Schmittner, Malte P. Siems, Tobias Ullsperger, Thorsten A. Goebel, Daniel Richter, Stefan Nolte

Author Affiliations +

Proceedings Volume PC12402, Components and Packaging for Laser Systems IX; PC1240203 (2023) https://doi.org/10.1117/12.2649952
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We present a novel technique for the control of the spectral profiles of fiber Bragg gratings written with ultrashort laser pulses and the phase mask technique. Instead of controlling the modification strength along the grating, the apodisation is realized by controlling the cross-sectional overlap of modification and fiber core by a custom designed shaping aperture. As a proof of concept, gratings were realized with super-Gaussian shaped profiles with different orders, producing the expected spectral profiles, which was verified by simulations.

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Ria G. Krämer, Christian P. Schmittner, Malte P. Siems, Tobias Ullsperger, Thorsten A. Goebel, Daniel Richter, and Stefan Nolte "Ultrashort pulse inscribed fiber Bragg gratings with controlled apodisation profiles", Proc. SPIE PC12402, Components and Packaging for Laser Systems IX, PC1240203 (17 March 2023); https://doi.org/10.1117/12.2649952

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