Feedback Control and Power Stability of Intracavity Frequency Doubled Diode-Pumped Nd:YVO4 Lasers

• Main Authors: Y. C. Huang, 黃怡正
• Other Authors: Y. F. Chen
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/27300732273282229234

碩士 === 國立交通大學 === 電子物理系 === 90 === The output fluctuations of intracavity frequency doubled diode-end-pumped Nd:YVO4 laser arise from temperature of nonlinear crystal and mechanical vibration. The instability restricts the application of the green laser. In order to stabilize the output power, we use optical feedback control system to control the laser. However, we discover that the reflectance of beam splitter cannot vary with the direction and polarization of laser. We improve the instability from ±7.31% to ±0.82% in the measurement of 8 hours. Obviously, we obtain a more stable laser by using optical feedback control system.