Optimization of Continuous Wave and Active Q-switched Lasers at 532 nm

• Main Authors: Chen, Yi-Bin, 陳詣斌
• Other Authors: 陳永富
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/r449gw

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 a reliable and stable high power continuous wave and active Q-switched green lasers through a linear resonant cavity. First, use a laser diode with a wavelength of 808 nm as the excitation light source, Nd:YVO4 as the gain medium to convert the excitation light source to a 1064nm wavelength laser, a plane mirror and a concave lens to form a linear resonant cavity, and then use nonlinear crystals LBO and KTP respectively for frequency conversion, multiplied the fundamental frequency 1064nm to 532nm, a continuous wave green laser. Next, use a Nd:YVO4 crystal with a 532 nm high reflective coating to observe the effects on the green laser output power; then use different focus ratios of the coupling lens to change the size of the excitation light to observe the effects to green light laser output power. Finally, an acousto-optic crystal was introduced to form an active Q-switched green laser in this system, to establish output power curves at different repetition rates, and the performance of the pulse wave type of LBO and KTP. Digging into the crystal performance research. In this way, according to different needs, we can choose suitable parameters to set up a green laser pulses with high power, high stability, and small size.