Changing the Optical Properties of the Glass using Heat in Presence of a He-Ne Laser

Abstract

In this research, the effect of heat on the optical properties of glass was investigated, and we studied whether ordinary glass shows any non-linear behavior by heat or not. The method that was used is by applying a He-Ne laser to a glass sample (soda-lime glass), then applying a heat source perpendicular to the glass. Heat increases the kinetic energy of glass particles by vibration of molecules. This vibration may increase the susceptibility of glass to absorb light or may turn it into a non-linear material. From results and graphs, it was found that the optical properties of the glass has changed, and the glass behaves nonlinearly through heating and cooling processes (from T = 85℃ until the end of cooling process).