抄録
New design of diode-end-pumped solid-state laser rods using composite structured crystals, diffusion-bonded with undoped end for improvement of thermal conduction is presented. In this paper, we discuss a analytical and experimental study on the characteristics of the composite laser rod in detail using Nd:YAG rods as example. The undoped end section is calculated to act as an effective heat diffuser and then peak temperature rise is reduced to <70% when it is compared with the non-composite crystals. We have also demonstrated high power operation of a diode-end-pumped Nd:YVO4 laser using composite rod. A maximum CW output power of 9.3W was achieved, which is 1.5 times higher than in the non-composite Nd:YVO4 rod. This high power performance of the composite rod is achieved owing to a decrease of thermally induced stress.
