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Opt Express. 2012 Jan 30;20(3):2824-31. doi: 10.1364/OE.20.002824.

Study of the photosensitivity of GeS binary glasses to 800 nm femtosecond pulses.

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Centre d’optique, photonique et laser (COPL), Université Laval, Québec G1V 0A6, Canada.


We present the first study of the photosensitivity of GeS binary glasses in response to irradiation to femtosecond pulses at 800 nm. A maximum positive refractive index change of 3.5x10(-3) is demonstrated with the possibility to control the waveguide diameter from ~8 to ~50 µm by adjusting the input pulse energy. It is also demonstrated that under different exposure conditions, a maximum negative index change of -7.5x10(-3) can be reached. The present results clearly illustrate the potential of this family of glasses for the fabrication of mid-infrared waveguides.

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