Lijun Xu

Diode-pumped Nd:YCOB self-frequency-doubling green laser at 530 nm

We report a continuous-wave (CW) self-frequency-doubling blue laser at 468 nm by a diodepumped Nd3+:YCa4O(BO3)3 (Nd:YCOB) laser. With 14.3 W of diode pump power, a maximum output power of 211 mW in the blue spectral range at 468 nm has been achieved. The beam quality M2 values were equal to 1.16 and 1.23 in X and Y directions, respectively. The output power stability over 30 min is better than 5%. To the best of our knowledge, this is the highest power laser at 468 nm generated by self-frequency doubling of a diode pumped Nd:YCOB laser.

Diode-pumped Nd3+:YAl3(BO3)4 laser at 1338 nm

A high-power diode -pumped Nd3+:YAl3(BO3)4 (Nd:YAB) laser emitting at 1338 nm is described. At the incident pump power of 9.8 W, as high as 734 mW of continuous-wave (CW) output power at 1338 nm is achieved. The slope efficiency with respect to the incident pump power was 9.0%. To the best of our knowledge, this is the first demonstration of such a laser system. The output power stability over 60 min is better than 2.6%. The laser beam quality M2 factor is 1.21.

Efficient all solid-state dual-wavelength Nd:LuVO4 laser at 916 and 1343 nm and sum-frequency mixing for an emission at 545 nm

We report on the efficient continuous-wave (CW) dual-wavelength operation of a Nd:LuVO4 laser at 916 and 1343 nm. An output power of 2.15 W for the dual-wavelength was achieved at the incident pump power of 18.2 W. Intracavity sum-frequency mixing at 916 and 1343 nm was then realized in a LBO crystal to reach the yellow-green range. A maximum output power of 523 mW in the yellow-green spectral range at 545 nm has been achieved. The yellow-green output stability is better than 3.5%. The yellow-green beam quality M2 value are about 1.31 and 1.18 in both horizontal and vertical dimensions, respectively.

Continuous wave Nd:LuVO4-LBO blue laser under direct 888 nm diode laser pumping

We report the efficient blue laser at 458 nm generation by intracavity frequency doubling of a continuous wave (CW) laser operation of a diode pumped Nd:LuVO4 laser on the 4F3/2 → 4I9/2 transition at 916 nm. An LiB3O5 (LBO) crystal, cut for critical type I phase matching at room temperature is used for second harmonic generation of the laser. At an incident pump power of 18.2 W, as high as 1.73 W of continuous wave (CW) output power at 458 nm is achieved. The optical-to-optical conversion efficiency is up to 9.5%, and the fluctuation of the red output power was better than 3.5% in the given 30 min.

Efficient dual-wavelength Nd:YVO4 laser at 1085 and 1342 nm and sum-frequency mixing for an orange emission

We report on the efficient continuous-wave (CW) dual-wavelength operation of a Nd:YVO4 laser at 1085 and 1342 nm. An output power of 1.72 W for the dual-wavelength was achieved at the incident pump power of 17.4 W. Intracavity sum-frequency mixing at 1085 and 1342 nm was then realized in a KTP crystal to reach the orange range. A maximum output power of 146 mW in the orange spectral range at 600 nm has been achieved. The orange output stability is better than 3.8%. The orange beam quality M2 value is about 1.41 and 1.25 in both horizontal and vertical dimensions, respectively.

490-nm generation by sum-frequency mixing of diode pumped Nd:GdVO4-Nd:YLF lasers

We report a continuous-wave (CW) blue laser emission by sum-frequency mixing in Nd:GdVO4 and Nd:YLF crystals. Using type-I critical phase-matching (CPM) LBO crystal, a blue laser at 490 nm is obtained by 1063 and 908 nm intracavity sum-frequency mixing. The maximum laser output power of 118 mW is obtained when an incident pump laser of 18.2 W is used. At the output power level of 118 mW, the output stability is better than 4.2%.