Effect of Material Irradiated Type and Spot Size on Spot Center Temperature of a Diode-Pumped Solid State Laser

Abstract

This article presents an experimental study of measuring the temperature of the center spot of DPSS green laser, which emits a light beam with a center wavelength of (532 nm), and its changing with the laser spot dimensions and the type of material. The optical properties of this laser were studied, for example, the threshold current value was determined to be 62mA at room temperature. The results showed that the temperature of the center of the spot decreases logarithmically with increasing laser spot size. Moreover, by studying the spectral power distribution with the laser spot dimensions, it is observed that the density of the power spectral distribution drops in an inverse exponential function with increasing spot size. Finally, the results showed that the temperature of the of the spot center increases as the density of the power spectral distribution increasing.