Identifying the best chalcogenide glass compositions for the application in mid-infrared waveguides

We prepared numbers of GeAsSe glasses and investigated their thermal stability and optical properties in order to search the best glasses with relatively high glass transition temperature T g , strong structural stability, low optical loss and high optical nonlinearity. Through our systematical measurements, we concluded that the glasses with a mean coordination number around 2.45-2.5 are the best for the applications in photonics with T g of 450K, low optical loss of 0.2dB/cm, high optical nonlinearity 7.5×10 -14 cm 2 /W and less photosensitivity.