| Summary: | 碩士 === 國立交通大學 === 電子物理系所 === 100 === Pulsed lasers with higher repetition rates have extensive application in industry, communication, academic research. In this thesis, we use Yb:YAG as a gain medium with self-mode-locked method to create a high repetition rate pulsed laser. We use different doping concentrations of Yb:YAG and different cavity design to study the performance of self-mode-locked laser output. In the experiment, the pulse repetition rate up to 600GHz. The gain medium is coated to form a cavity mirror and to play an etalon for achieving harmonic mode-locking. A diamond heat spreader is employed to reduce the thermal effects for power scale-up. In addition, we also observed in the experiment, the Yb:YAG self-mode-locked laser will have four layers fluctuations under different time scales. The outermost and the third layer caused by the polarization competition, the second layer for relaxation oscillation, while the innermost layer of the mode-locked pulse.
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