Experimental Investigation of Heat Dissipation of Fe: ZnSe Crystal

摘要

Crystal thermal characteristic is a key factor to affect output laser property. In some applications, the facets of crystalwill be contaminated by dust in the air, which will enhance the heat absorption of laser and cause local thermal unbalance.Therefore, a novel crystal heat dissipation method is proposed in this paper. Crystal is mounted in a specially designedheat sink, heat conducts between the contacting surfaces of crystal and heat sink. Pump incident laser irradiates from theend facet of crystal. The end facet of crystal is cooling by convection heat transfer with flowing protect gas. The experimentdevice is established, the pump laser is Hydrogen Fluoride laser with the wavelength of 2.8μm, pulse energy of 600mJ,and repetition rate of 50Hz. The crystal is Fe: ZnSe with the dimension of 20mm ? 20mm ? 6mm. The beam quality ismeasured in the condition with and without heat sink for comparison, the results indicate that the heat dissipation methodproposed in this paper is benefit for improving the beam quality.