Point-by-point inscription of apodized fiber Bragg gratings
Robert J. Williams, Christian Voigtl\"ander, Graham D. Marshall,, Andreas T\"unnermann, Stefan Nolte, M. J. Steel, Michael J. Withford
TL;DR
This paper presents a novel point-by-point laser inscription method for creating apodized fiber Bragg gratings with customizable profiles, enabling precise control over their optical properties.
Contribution
It introduces a simple, highly localized laser inscription technique for fabricating complex apodized fiber Bragg gratings with tailored phase and coupling profiles.
Findings
Successful demonstration of apodized gratings with complex profiles
Precise control over grating phase and coupling amplitude
Utilization of focused femtosecond laser inscription for high contrast modifications
Abstract
We demonstrate apodized fiber Bragg gratings inscribed with a point-by-point technique. We tailor the grating phase and coupling amplitude through precise control over the longitudinal and transverse position of each laser-inscribed modification. This method of apodization is facilitated by the highly-localized, high-contrast modifications generated by focussed IR femtosecond laser inscription. Our technique provides a simple method for the design and implementation of point-by-point fiber Bragg gratings with complex apodization profiles.
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