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10 July 2018 Ultrashort pulse point-by-point written aperiodic fiber Bragg gratings for suppression of OH-emission lines
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Abstract
We demonstrate the direct inscription of aperiodic fiber Bragg gratings (AFBGs) for their use as in-fiber filter elements. The modifications are induced by focusing ultrashort laser pulses with an oil-immersion objective into the fiber core. We apply an advanced point-by-point inscription technique for flexible period adaptation. The fabricated AFBGs are targeted on the suppression of 10 lines in a single grating and simulations based on the specific design show excellent agreement. Furthermore, we discuss the application in astronomy as filters for the suppression of OH emission lines.
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Thorsten A. Goebel, Gayathri Bharathan, Martin Ams, Daniel Richter, Ria G. Krämer, Maximilian Heck, Malte P. Siems, Alex Fuerbach, and Stefan Nolte "Ultrashort pulse point-by-point written aperiodic fiber Bragg gratings for suppression of OH-emission lines", Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107066N (10 July 2018); https://doi.org/10.1117/12.2318864
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