Optimization of Active Q-switched Lasers at Wavelength of 671 nm

• Main Authors: Wang, Hsing-Kai, 王星凱
• Other Authors: Chen, Yung-Fu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/6nub8d

碩士 === 國立交通大學 === 理學院應用科技學程 === 106 === The aim of this thesis is focused on developing reliable active Q-switched lasers at 671 nm based on linear cavity and V-shaped configurations. The Nd:YVO4 crystal is pumped by a 808-nm laser diode and emit the light at wavelength of 671 nm through intracavity frequency doubling. In linear cavity, we demonstrate the Q-switched output performance by using three different front mirrors. Experimental results reveal that plano-plano cavity is the most suitable cavity design to obtain the highest output power. Based on the plano-plano cavity, we utilize three different pump mode size to explore the performance of laser output. At an incident pump power of 24.2 W, the output power can be up to 4.02 W with the pump mode size of 800 m. At the same time, we also explore the output performance by utilizing the V-shaped cavity. The maximum average output power is measured to be 5.3 W at a pump power of 24.2 W. This work enables us to optimize reliable active Q-switched lasers at 671 nm with efficient high average output power.