A diode-pumped actively Q-switched and modelocked Nd:GdVO4 laser with great average output power and high efficiency was realized by using a comparative simple configuration and a short cavity length. The laser generates stable mode-locked pulses of estimated width 240 ps lying underneath a Q-switched envelope of width 170 ns with a Q-switch modulation frequency of 10 kHz. The modulation depth was more than 90% and the mode-locked pulse inside the Q-switched pulse has a repetition rate of 390 MHz.
By using LT-GaAs as saturable absorber, we have demonstrated the stable Q-switched and mode-locked (QML) Nd:LuVO 4 laser run in a Z-type folded cavity. Nearly 100% modulation depth of mode locking can be obtained as long as the pump power reaches the oscillation threshold. The repetition rate of the passively Q-switched pulse envelops ranges from 37.5 to 139 kHz as the pump power increased from 1.7 to 8.2 W. The mode-locked pulse inside the Q-switched envelop has an estimated pulse width of about 220 ps and a repetition rate of 111 MHz. Under an incident pump power of 8.2 W, the highest pulse energy of 6 μJ of each Q-switched envelope, and the highest peak power about 2.73 kW of Q-switched mode-locked pulses can be obtained. The CW and Q-switched mode-locking output powers versus the incident pump power
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.