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Negative-index gratings formed by femtosecond laser overexposure and thermal regeneration
We demonstrate a method for the preparation of negative-index fibre Bragg gratings (FBGs) using 800 nm femtosecond laser overexposure and thermal regeneration. A positive-index type I-IR FBG was first inscribed in H(2)-free single-mode fibre using a femtosecond laser directed through a phase mask, a...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4793244/ https://www.ncbi.nlm.nih.gov/pubmed/26979090 http://dx.doi.org/10.1038/srep23379 |