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Astigmatism compensation for waveguide inscription in optical fiber by femtosecond lasers

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.

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

Congress: European Workshop on Optical Fibre Sensors (7º : 2019, Limassol, Chipre)

Publisher: SPIE Society of Photo-Optical Instrumentation Engineers

Publication date: 28/08/2019

No. of pages: 4

Publication type: Conference object

DOI: 10.1117/12.2539835

ISSN: 0277-786X,1996-756X

Spanish project: TEC2016-76021-C2-2-R

Publication Url: https://doi.org/10.1117/12.2539835

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Authorship

DAVID PALLARES ALDEITURRIAGA

PABLO ROLDAN VARONA

LUIS RODRIGUEZ COBO

JOSE MIGUEL LOPEZ HIGUERA

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