Journal
OPTICAL MATERIALS EXPRESS
Volume 1, Issue 5, Pages 998-1008Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.1.000998
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Funding
- Agence Nationale pour la Recherche [ANR-09-BLAN-0172-01]
- RTRA Triangle de la Physique (Reseau Thematique de Recherche Avancee) [2008-056T]
- FP7-PEOPLE-IRSES e-FLAG [247635]
- Australian Research Council (ARC) [DP A7158, DP A2748]
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Waveguides are inscribed through densification of the surrounding region of a damage induced channel created by femtosecond irradiation within silica. Single mode propagation at 1.5 mu m is obtained below the damage region whilst at shorter wavelengths guidance is only observed away on either side of the region. The quasi-periodic nanostructure that is induced can explain the mode profile elongation observed with polarised light at 45. The origin of this guidance area is explored using SEM analysis, which reveals nanoporous regions within laser track structure above and below the densified region where 1.5 mu m propagates. Shorter wavelength light is not supported in this area. (C) 2011 Optical Society of America
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