We present results on the fabrication of low-loss Fibre Bragg Gratings (FBGs) that were directly inscribed into the fibre core using focused femtosecond laser pulses in a continuous core-scanning technique . This method enables the fabrication of strong Type I-IR gratings with virtually arbitrary reflection and dispersion profiles. While the core-scanning technique offers the same flexibility over the grating period that is the distinctive feature of point-by-point inscribed gratings (which are typically Type II-IR damage-gratings), it also results in ultra-low scattering losses that can normally only be achieved in phase-mask written gratings. The types of structures that have been fabricated include uniform FBGs, chirped FBGs, apodised FBGs and phase-shifted gratings. All gratings were inscribed with circular polarized light in order to reduce losses associated with light scattering on nano-gratings or nano-crevices, respectively .
|Title of host publication||European Conference on Lasers and Electro-Optics, CLEO 2015|
|Publisher||OSA - The Optical Society|
|Number of pages||1|
|Publication status||Published - 2015|
|Event||European Conference on Lasers and Electro-Optics, CLEO 2015 - Munich, Germany|
Duration: 21 Jun 2015 → 25 Jun 2015
|Other||European Conference on Lasers and Electro-Optics, CLEO 2015|
|Period||21/06/15 → 25/06/15|
Antipov, S., Ams, M., Williams, R., Fuerbach, A., & Withford, M. (2015). Femtosecond laser written fibre bragg gratings with arbitrary reflection and dispersion profiles. In European Conference on Lasers and Electro-Optics, CLEO 2015 [CM_4_3] OSA - The Optical Society.