Three-dimensional mid-infrared photonic circuits in chalcogenide glass

Details Three-dimensional mid-infrared photonic circuits in chalcogenide glass Three-dimensional mid-infrared photonic circuits in chalcogenide glass

2011-12-12

arxiv.org/abs/1112.2546v1

Physics

Optics

3 pages, 4 figures, article submitted to Optics Letters on the 14th of November 2011

Scientific paper

We report the fabrication of single mode buried channel waveguides for the whole mid-infrared transparency range of chalcogenide sulphide glasses by means of direct laser writing. We have explored the potential of this technology by fabricating a prototype three-dimensional three-beam combiner for future application in stellar interferometry, which delivers a monochromatic interference visibility of 99.89% at 10.6 \mum, and an ultrahigh bandwidth (3-11 \mum) interference visibility of 21.3%. These results demonstrate that it is possible to harness the whole transparency range offered by chalcogenide glasses on a single on-chip instrument by means of direct laser writing, a finding that may be of key significance in future technologies such as astrophotonics and biochemical sensing.

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