Qinan Li

Continuous wave 935 nm Nd:CNGG laser at watt-level power

An efficient continuous wave (CW) laser-diode-pumped Nd-doped Ca(3)(NbGa)(2-x)Ga(3)O(12) (CNGG) laser operating at 935 nm is demonstrated by using a simple linear cavity for the first time to our knowledge. Output power up to 1.12 W is obtained, corresponding to a slope efficiency of 7.1% and an optical-to-optical efficiency of 5.7%. The laser operates with the fundamental transverse mode when the output power is as high as 800 mW. This laser provides a potential light source for differential absorption lidar in water vapor detection.

An 885-nm Direct Pumped Nd:CNGG 1061 nm Q-Switched Laser

The 885 nm direct pumping method, directly into the F-4(3/2) emitting level of Nd3+ ion, is used to a Nd:CNGG crystal to product passive Q-switched 1061 nm laser pulses, for the first time to the best of our knowledge. A maximum average output power of 1.16 W for 1061 nm Q-switched pulses and a repetition rate of 12.54 kHz are obtained. The pulse width is measured to be 24 ns and the peak power is 3.843 kW. A high-quality fundamental transverse mode can be observed owing to the reduction of the thermal effect for Nd: CNGG crystal by 885 nm direct pumping.

Diode-pumped self-Q-switched Cr,Nd:YAG laser with 7-W average output power

We report a diode-pumped self-Q-switched 1064-nm Cr,Nd:YAG laser with pulse duration in the range of 16?18 ns. The maximum average output power up to 7 W, corresponding to a slope efficiency of 33%, is obtained in a simple and compact linear cavity by using a plane-concave output coupler with a transmittance of 15%. The laser operates at TEM00 mode with a pump power of 14.2 W.

LD-Pumped Continuous Wave Nd:CNGG Laser Operating at 935nm

An efficient CW LD-pumped Nd-doped Ca3(NbGa)2-xGa3O12(CNGG) laser operating at 935nm is demonstrated for the first time. The maximum average output power is more than 800mW with slope efficiency of 8% and optical-to-optical efficiency is 6%.