Design And Analysis On Structure Parameters Of Diode Side-Pumped Thin Disk Laser

Diode-pumped thin disk laser is an important aspect in the study of silid state laser, which plays a significant role in solid laser field and has great potential and broad perspective in application. The paper purpose is to improve output power on the precondition of maintaining high beam quality. The paper presents a new structure that is diode side-pumped composite thin disk laser.The paper summarizes current technology of face-pumped thin disk laser and side-pumped thin disk laser, analyzes their advantages and restrictions, introduces characteristic property and their comparison, presents the development trends of thin disk laser.Cylindrical microlenses for collimating diode lasers is designed. We make a computer simulation of collimation on ZEMAX, and do experiments. Results show that these designed cylindrical microlenses satisfy pumping demands.Under the various conditions of diode side-pumped, characteristics of gain distrib- ution in the thin disk are systematic researched. A complete set of theoretical model is built up. Computer simulation is employed and a series of 3D pattern and important characteristic parameters are observed. Effect of change of system parameters on gain distribution is analyzed.Thermal effect of thin disk laser is analyzed. Thermal focal length expression is carried out theoretically. Resonator cavity of thin disk laser is designed, using plane-concave cavity to make it work stably and obtain large fundamental mode volume. Characteristics of thin disk laser are analyzed. By using some relevant parameters, we obtain numerical values of beam quality, output power and conversion efficiency.For controlling the temperature effectively, we use microchannel cooling for diode laser and jet cooling for thin disk crystal. Microchannel cooler, jet cooler, arrangement for diode laser, pumping structure and resonator cavity are designed. Finally, system structure of thin disk laser is designed.