Astigmatism compensation for waveguide inscription in optical fiber by femtosecond lasers

D. Pallarés Aldeiturriaga; P. Roldán-Varona; L. Rodriguez-Cobo; J. M. Lopez-Higuera

doi:10.1117/12.2539835

28 August 2019 Astigmatism compensation for waveguide inscription in optical fiber by femtosecond lasers

D. Pallarés Aldeiturriaga, P. Roldán-Varona, L. Rodriguez-Cobo, J. M. Lopez-Higuera

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111992T (2019) https://doi.org/10.1117/12.2539835
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

The cylindrical geometry of optical fibers produces an astigmatic distortion in a wavefront focused within it. In the case of femtosecond lasers, this produces a fluence loss that decreases its processing performance. In this work, the phase change produced by an astigmatic femtosecond laser beam (direct exposition to the) and a corrected beam (applying a simple adaptive optics process) is compared. The astigmatic correction decreases the modification threshold by approximately a magnitude order and changes the sign of the refractive index change at low pulse energies.

Citation Download Citation

D. Pallarés Aldeiturriaga, P. Roldán-Varona, L. Rodriguez-Cobo, and J. M. Lopez-Higuera "Astigmatism compensation for waveguide inscription in optical fiber by femtosecond lasers", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111992T (28 August 2019); https://doi.org/10.1117/12.2539835

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