Title :
Pulse energy increase by emission cross-section control in passively Q-switched Nd:YVO4/Cr4+:YAG laser
Author :
Kausas, A. ; Taira, Takunori
Author_Institution :
Laser Res. Centre, Inst. for Mol. Sci., Okazaki, Japan
Abstract :
In this work, emission cross-section dependence on temperature was observed experimentally in passively Q-switched Nd:YVO4/Cr4+:YAG laser. Heating the gain element from 30 °C to 70 °C, the Q-switch pulse energy at 100 Hz QCW pump was increased by three times from 60 μJ to 190 μJ and pulse duration was reduced by 30% from 2.5 ns to 1.8 ns, with peak power from 24 kW to 105 kW. With addition of heat dissipating SiC crystal, 1 kHz Q-switch pulses were achieved with pulse energy 170 μJ and duration of 1.8 ns, which corresponds to peak power of 91 kW.
Keywords :
Q-switching; chromium; neodymium; optical pulse generation; solid lasers; yttrium compounds; YAG:Cr; YVO4:Nd; emission cross-section control; energy 170 muJ; energy 60 muJ to 190 muJ; frequency 1 kHz; frequency 100 Hz; heat dissipation; passive Q-switching; power 24 kW to 105 kW; power 91 kW; pulse energy increase; temperature 30 degC to 70 degC; time 1.8 ns; time 2.5 ns; Crystals; Heating; Laser applications; Power lasers; Silicon carbide; Temperature dependence; Temperature distribution;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2013 Conference on
Conference_Location :
San Jose, CA
