Open AccessFemtosecond fiber Bragg grating fabrication with adaptive optics aberration compensation
Author(s) -
Patrick S. Salter,
Matthew J Woolley,
Stephen M. Morris,
Martin J. Booth,
Julian Fells
Publication year - 2018
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.43.005993
Subject(s) - optics , materials science , femtosecond , fiber bragg grating , lens (geology) , optical fiber , fabrication , laser , physics , medicine , alternative medicine , pathology
We present fiber Bragg gratings (FBGs) fabricated using adaptive optics aberration compensation for the first time to the best of our knowledge. The FBGs are fabricated with a femtosecond laser by the point-by-point method using an air-based objective lens, removing the requirement for immersion oil or ferrules. We demonstrate a general phase correction strategy that can be used for accurate fabrication at any point in the fiber cross-section. We also demonstrate a beam-shaping approach that nullifies the aberration when focused inside a central fiber core. Both strategies give results which are in excellent agreement with coupled-mode theory. An extremely low wavelength polarization sensitivity of 4 pm is reported.