X. H. Fu

Quasi-three-level Nd:YVO4 laser by diode pumping at 888 nm

We report efficient laser emission on the 914 nm 4F3/2 to 4I9/2 transition in Nd:YVO4 under the pump with diode lasers at 888 nm for the first time. Continuous wave 6.57 W output power at 914 nm is obtained from a V-type resonator under 18.3 W of absorbed pump power; the slope efficiency with respect to the absorbed pump power was 60.6%. Moreover, intracavity frequency doubling with BiB3O6 (BiBO) nonlinear crystal yielded 1.77 W of deep-blue light at 457 nm with beam quality characterized by an M2 factor of 1.25.

Efficient CW Nd:GdVO4-BiBO deep-blue laser at 456 nm under direct 888 nm diode laser pumping

We report an efficient laser emission on the 912 nm 4F3/2 to 4I9/2 transition in Nd:GdVO4 under the pump with diode lasers at 888 nm. Continuous wave (CW) 4.91 W output power at 912 nm is obtained under 18.3 W of incident pump power; the slope efficiency with respect to the incident pump power was 57.5%. Moreover, intracavity frequency doubling with BiB3O6 (BiBO) nonlinear crystal yielded 1.33 W of deep-blue light at 456 nm.

Diode-pumped Pr3+:YAlO3/LBO violet laser at 374 nm

We report a diode-pumped Pr3+:YAlO3 laser emitting at 747 nm. A power of 232 mW at 747 nm has been achieved in continuous-wave operation with a diode emitting 2 W at 448 nm. Furthermore, intracavity second-harmonic generation in continuous-wave mode has also been demonstrated with a power of 52 mW at 374 nm by using a LBO nonlinear crystal. The fluctuation of the violet output power was better than 2.3%. The beam quality M2 value is 2.2.

Efficient red light generated by intracavity frequency doubling of a 1331 nm Nd:GGG laser with LBO

We report a continuous-wave (CW) coherent red radiation at 666 nm by intracavity frequency doubling generation of 1331 nm Nd:GGG laser. With incident pump power of 18.3 W, output power of 910 mW at 666 nm has been obtained using a 10 mm-long LBO crystal. At the output power level of 910 mW, the output stability is better than 5%. The beam quality M2 values were equal to 1.21 and 1.34 in X and Y directions, respectively.

Diode-pumped Nd:LGS intracavity-doubled green laser at 532 nm

It is reported that efficient continuous-wave (CW) green laser generation at 532 nm in a KTP crystal at type-II phase matching direction performed with a diode-pumped Nd:LGS laser. With incident pump power of 18.2 W, output power of 2.68 W at 532 nm has been obtained using a 5 mm-long KTP crystal. The optical conversion efficiency was up to 14.7%. At the output power level of 2.68 W, the output stability is better than 3.5%. The beam quality M2 values were equal to 1.33 and 1.19 in X and Y directions, respectively.

Diode-pumped CW Nd3+:YAlO3 laser at 1339 nm

A diode-pumped Nd3+:YAlO3 (Nd:YAP) laser emitting at 1339 nm is described. At the incident pump power of 17.8 W, as high as 3.4 W of continuous-wave (CW) output power at 1339 nm is achieved. The slope efficiency with respect to the incident pump power was 23.6%. The output power stability over 60 min is better than 3.5%. The laser beam quality M2 factor is 1.33.

Diode-pumped Nd:CaYAlO4-KTP intracavity-doubled green laser at 540 nm

It is reported that efficient continuous-wave (CW) green laser generation at 540 nm in a KTP crystal at type-II phase matching direction performed with a diode-pumped Nd:CaYAlO4 laser. With incident pump power of 18.2 W, output power of 324 mW at 540 nm has been obtained using a 5 mm-long KTP crystal. At the output power level of 324 mW, the output stability is better than 2.8%. The beam quality M2 values were equal to 1.34 and 1.22 in X and Y directions, respectively.

Yellow-orange light generation by self-sum-frequency mixing Nd:YCOB laser

We report for the first time a coherent yellow-orange radiation at 590 nm by self-sum-frequency generation of the 1060 and 1332 nm laser-lines of the Nd:YCOB crystal. With a diode pump power of 14.3 W, the maximum yellow-orange output power of 286 mW is obtained. The power stability is better than 3.6%. The beam quality M2 value is about 1.32.

Diode-pumped eye sensitive laser at 554.7 nm based on intracavity sum frequency generation

We report for the first time a coherent radiation at 554.7 nm by intracavity sum-frequency generation of 946 nm Nd:YAG laser and 1341 nm Nd:YAP laser. Yellow-green laser is obtained by using a doubly folded cavity, type-II critical phase matching KTP crystal sum-frequency mixing. With total pump power of 36.1 W (17.8 W pump power for 1341 nm Nd:YAP laser and 18.3 W pump power for 946 nm Nd:YAG laser), TEM00 mode yellow-green laser at 554.7 nm of 1.43 W is obtained.

All-solid-state Nd:Gd0.18Y0.82VO4-LBO green laser at 532 nm

We report a continuous-wave (CW) coherent green radiation at 532 nm by intracavity frequency doubling generation of 1064 nm Nd:Gd0.18Y0.82VO4 laser. With incident pump power of 18.2 W, output power of 1.08 W at 532 nm has been obtained using a 5 mm-long KTP crystal. The optical conversion efficiency was up to 5.9%. At the output power level of 1.08 W, the output stability is better than 5%. The beam quality M2 values were equal to 1.26 and 1.12 in X and Y directions, respectively.