Direct laser writing of buried waveguide in As sub(2)S sub(3) glass using a helical sample translation

We report the fabrication and the characterization of buried waveguide in As sub(2)S sub(3) glass. It is well known that the interaction of femtosecond pulses with this material at high laser repetition rates results in a mainly negative refractive index variation, due to heat accumulation effect. H...

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Bibliographic Details
Published in:Optics letters 2013-01, Vol.38 (20), p.4212-4215
Main Authors: Caulier, Ophelie, Le Coq, David, Bychkov, Eugene, Masselin, Pascal
Format: Article
Language:English
Subjects:
Direct laser writing
Femtosecond pulses
Glass
Helical
Laser beams
Lasers
Translations
Waveguides
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Summary:We report the fabrication and the characterization of buried waveguide in As sub(2)S sub(3) glass. It is well known that the interaction of femtosecond pulses with this material at high laser repetition rates results in a mainly negative refractive index variation, due to heat accumulation effect. However, we show here that a helical translation of the sample parallel to the laser beam, allows the inscription of a core of positive refractive variation, with full control over its magnitude and diameter. An example demonstrating the high symmetry of the guided mode is given.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.38.004212