Diode-pumped Continuous-waved EO Q-switched Tm:YAP laser

• Main Authors: Jhao-Ren Chiou, 邱昭仁
• Other Authors: Shou-Tai Lin
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/7h6ryn

碩士 === 逢甲大學 === 光電學系 === 106 === The purpose of this thesis is to construct a diode-pumped high power wavelength tunable Tm:YAP laser in the 2μm range. We utilize two schemes, gain switching and EO Q-switching, to generate pulsed laser and compare the output performance. We first construct a continuous wave Tm:YAP laser with more than 8 W output power and 45.7% slope efficiency when the cavity length and diode wavelength were 25 mm and 792 nm, respectively. By adjusting an intracavity quartz birefringent plate, the output wavelength of Tm:YAP laser can be tuned from 1933 to 1998 nm. Pulsed Tm:YAP laser was then generated through gain-switching and quasi cw pump scheme. When pump peak power was 38 W and pump pulse duration was 510 μs, the pulse energy, pulse duration and pulse repetition were 189 μJ, 1.34 μs and 500 Hz, respectively. Q-switched Tm:YAP laser was constructed through EO MgO:PPLN. When pump power was 18 W, the pulse energy, pulse duration and pulse repetition were 2.25 mJ, 43.6 ns and 200 Hz, respectively.