Cr,Er:Y2.93Sc1.43Ga3.64O12 Laser Giant Pulse Generation at 2.79μm Using Electro-Optic Q-Switch
LIU Jin-Sheng1,3, LIU Jing-Jiao2,3
1Institute of Opto-electronics, Harbin Institute of Technology, Harbin, 150001 2Institute of North Electronic Equipment, Beijing 100833Currently with the Accueo Company Limited, Beijing 100102
Cr,Er:Y2.93Sc1.43Ga3.64O12 Laser Giant Pulse Generation at 2.79μm Using Electro-Optic Q-Switch
LIU Jin-Sheng1,3;LIU Jing-Jiao2,3
1Institute of Opto-electronics, Harbin Institute of Technology, Harbin, 150001 2Institute of North Electronic Equipment, Beijing 100833Currently with the Accueo Company Limited, Beijing 100102
摘要We present an electro-optically Q-switched 2.79μm Cr,Er:Y2.93Sc1.43Ga3.64O12 laser using LiNbO3 Pockels cell and undoped Y3Al15O12 plate polarizer. The optimal delay for triggering the Q-switch with respect to the peak of waveform of the flashlamp is found to be about 120μs. The minimum pump threshold of 13.2J is realized using the output coupler of reflectivity 74%. The maximum outputs of 72.3mJ at 3Hz and 35.4mJ at 10Hz repetition rates are obtained. The minimum pulse width is measured to be 31.9ns. The far-field divergence angle of the laser beam is about 8.8mrad. The influence of repetition rates on the output energy is also discussed.
Abstract：We present an electro-optically Q-switched 2.79μm Cr,Er:Y2.93Sc1.43Ga3.64O12 laser using LiNbO3 Pockels cell and undoped Y3Al15O12 plate polarizer. The optimal delay for triggering the Q-switch with respect to the peak of waveform of the flashlamp is found to be about 120μs. The minimum pump threshold of 13.2J is realized using the output coupler of reflectivity 74%. The maximum outputs of 72.3mJ at 3Hz and 35.4mJ at 10Hz repetition rates are obtained. The minimum pulse width is measured to be 31.9ns. The far-field divergence angle of the laser beam is about 8.8mrad. The influence of repetition rates on the output energy is also discussed.
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2008, Vol. 25 
