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Liner Zou

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Proceedings Article | 20 February 2009 Paper

Fabrication of As2S8 channel waveguide with a low propagation loss

L. Zou, H. Lin, B. Chen, H. Hamanaka, M. Iso

Proceedings Volume 7279, 727903 (2009) https://doi.org/10.1117/12.810971

KEYWORDS: Annealing, Refractive index, Glasses, Channel waveguides, Ultraviolet radiation, Waveguides, Light wave propagation, Planar waveguides, Chalcogenide glass, Solids

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A₂S₈ glass films are shown to undergo changes in the refractive index under ultraviolet (UV) illumination and annealing treatment, respectively. Under UV illumination, the maximum change in the refractive index of the as-deposited A₂S₈ is ~0.056; while under annealing treatment, it lies on and increases with increase of the annealing temperature. In addition, the changes of the refractive index in the well-illuminated A₂S₈ glass films after annealing are not reversible until the annealing temperature is up to 160°C.The A2S8 channel waveguide fabricated by exposure to UV illumination still exists after annealing of 130~160°C, and the refractive index differences between the areas of the channel waveguide and the planar waveguide in this waveguide are 0.0120~0.0081. Light propagation experiment shows that this A₂S₈ channel waveguide has a light guide character with good quality and a low propagation loss of ~4dB/cm.

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