Simultaneous dual-wavelength CW laser operation at 1064 and 930 nm in Nd<Superscript>3+</Superscript>:YAlO<Subscript>3</Subscript>

A dual-wavelength continuous-wave (CW) diode end-pumped Nd³⁺:YAlO₃ (Nd:YAP) laser that generates simultaneous laser action at the wavelengths 1064 and 930 nm is demonstrated. A total output power of 2.15 W (1.57 W at 1064 nm and 0.58 W at 930 nm) for the dual-wavelength was achieved at the incident pump power of 17.8 W with optical conversion efficiency of 12.1%. The M ² values for 930 and 1064 nm lights were found to be around 1.21 and 1.32, respectively.     

Diode-pumped Nd:YVO<Subscript>4</Subscript>-LBO laser at 544 nm based on intracavity sum frequency generation

A dual-wavelength continuous-wave (CW) diode-pumped Nd:YVO₄ laser that generates simultaneous laser action at the wavelengths 914 and 1342 nm is demonstrated. A total dual-wavelength output power of 1.79 W was achieved at the incident pump power of 18.2 W. Furthermore, intracavity sum-frequency mixing at 914 and 1342 nm was then realized in a LBO crystal to reach the yellow-green range. We obtained a total CW output power of 212 mW at 544 nm.     

Dual-wavelength laser operation at 1061 and 942 nm in Nd:GSAG

A dual-wavelength continuous-wave (CW) diode end-pumped gadolinium scandium aluminum garnet (Nd:GSAG) laser that generates simultaneous laser action at the wavelengths 1061 and 942 nm is demonstrated. A total output power of 589 mW (476 mW at 1061 nm and 113 mW at 942 nm) for the dual-wave-length was achieved at the incident pump power of 18.2 W. The M ² values for 942 and 1061 nm lights were found to be around 1.18 and 1.37, respectively.     

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 M ² value are about 1.31 and 1.18 in both horizontal and vertical dimensions, respectively.     

Compact 584-nm light source based on sum-frequency mixing of diode pumped Nd:YLF lasers

A dual-wavelength continuous-wave (CW) diode end-pumped Nd:YLiF₄ (Nd:YLF) laser that generates simultaneous laser action at the wavelengths 1047 and 1321 nm is demonstrated. A total output power of 350 mW for the dual-wavelength was achieved. Furthermore, intracavity sum-frequency mixing at 1047 and 1321 nm was then realized in a LBO crystal to reach the yellow-green range. We obtained a total CW output power of 34 mW at 584 nm.     

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 M ² value is about 1.41 and 1.25 in both horizontal and vertical dimensions, respectively.     

Efficient all solid-state continuous-wave orange laser at 598 nm

We report for the first time a continuous-wave (CW) orange radiation at 598 nm by intracavity sum-frequency generation of 1341 nm Nd:GdVO₄ laser and 1080 nm Nd:YAlO₃ (Nd:YAP) laser. Orange laser is obtained by using a doubly cavity, type-II critical phase matching KTP crystal sum-frequency mixing. With total pump power of 36 W, TEM₀₀ mode orange laser at 598 nm of 268 mW is obtained. The orange power stability in 30 min is better than 3.8%.     

Continuous-wave dual-wavelength operation of a diode-end-pumped Nd:LuVO<Subscript>4</Subscript> laser

A dual-wavelength continuous-wave (CW) diode-pumped Nd:LuVO₄ laser that generates simultaneous laser action at the wavelengths 1066 and 1343 nm is demonstrated. A total dual-wavelength output power of 2.58 W was achieved at the incident pump power of 18.2 W. Furthermore, intracavity sum-frequency mixing at 1066 and 1343 nm was then realized in a LBO crystal to reach the yellow range. We obtained a total CW yellow output power of 830 mW at 594 nm.     

All-solid-state CW Nd:GdVO<Subscript>4</Subscript>-LBO red laser under direct 912 nm pumping

We report a red laser at 670.5 nm generation by intracavity frequency doubling of a continuous wave (CW) laser operation of a 1341 nm Nd:GdVO₄ laser under in-band diode pumping at 912 nm. An LBO crystal, cut for critical type I phase matching is used for second harmonic generation of the laser. At an incident pump power of 8.9 W, as high as 347 mW of CW output power at 670.5 nm is achieved. The fluctuation of the red output power was better than 3.7% in the given 30 min, and the beam quality factor M ² is 1.65.     

Laser diode-array pumped Nd:YAlO_3 CW laser at 1079.5nm and 1341.4nm

Two key problems,spectral matching and spatial overlap between pumpingbeam and the laser mode in the active material,of diode-laser-arrays(LD)end-pumped solid-state laser have been discussed.Initial experimental results were given for LD end-pumpedTEM_(00) CW Nd:YAlO_3 laser at the wavelength of 1079.5nm and 1341.4nm.The outputpower at 1079.5nm is 24.4mW with 14.5％ slope efficiency,and the output power is 1.2mW at 1341.4nm.     

Efficient intracavity frequency-doubled Nd:GdVO4-LBO red laser at 670.5 nm under direct 888 nm pumping

We report an efficient laser emission on the 1341 nm ⁴ F _3/2 to ⁴ I _13/2 transition in Nd:GdVO₄ under the pump with diode lasers at 888 nm. Continuous wave (CW) 6.58 W output power at 1341 nm is obtained under 18.3 W of incident pump power; the slope efficiency with respect to the incident pump power was 45.1%. Moreover, intracavity frequency doubling with LiB₃O₅ (LBO) nonlinear crystal yielded 1.77 W of red light at 670.5 nm.     

Diode-pumped Nd:YCOB self-frequency-doubling red laser at 666 nm

It is reported that efficient continuous-wave (CW) self-frequency-doubling red laser at 666 nm performed with a diode-pumped Nd³⁺:YCa₄O(BO₃)₃ (Nd:YCOB) laser. With a diode pump power of 14.3 W, TEM₀₀ mode red laser at 666 nm of 570 mW is obtained. At the output power level of 570 mW, the output stability is better than 3.5%. The beam quality M² value is about 1.25. To the best of our knowledge, this is the highest power laser at 666 nm generated by self-frequency doubling of a diode pumped Nd:YCOB laser.     

All solid-state CW orange-red laser at 620 nm

We report for the first time a continuous-wave (CW) orange-red radiation at 620 nm by intracavity sum-frequency generation of 1085-nm Nd:YVO₄ laser and 1444-nm Nd:YAG laser. Using type-II critical phase matching KTP crystal, 620-nm orange-red laser was obtained by 1085- and 1444-nm intra-cavity sum-frequency mixing, and output power of 223 mW was demonstrated. At the output power level of 223 mW, the output power stability is better than 3% and laser beam quality M ² factor is 1.32.     

Dual-Wavelength and Passively Q-Switched Nd :GdVO4 Lasers Operated at 1.34 μm Under 880 nm Diode Pumping

We report continuous-wave (CW) and passively Q-switched Nd :GdVO₄ lasers on ⁴F_3/2 → ⁴I_13/2 transition directly pumped by an 880 nm diode laser. A widely investigated Nd :GdVO₄ laser at about 1341 nm is operated with a maximum output power of 5.23 W and a slope efficiency of about 30.6%. Using an etalon for wavelength selection, we realize laser emission at about 1344 nm, for the first time to our knowledge, in a Nd :GdVO₄ laser, with a maximum output power of 4.19 W and a slope efficiency of 20.1%. Moreover, we achieve simultaneous dual-wavelength lasing at 1341 and 1344 nm with a maximum output power of 2.27 W and a slope efficiency of 13.5%, respectively. Using V³⁺ :YAG as a saturable absorber, stable Q switching is obtained at about 1341 nm with a maximum average output power of 1.15 W. The pulse width is 52.8 ns at a repetition rate of 279.8 kHz.

     

Diode-Pumped Yb:S-FAP Thin-Disk Laser Operating at 985 nm and the Second-Harmonic Generation at 492.5 nm

We report a diode-pumped continuous-wave (CW) thin-disk Yb³⁺-doped Sr₅(PO₄)₃F (Yb:S-FAP) laser operating at 985 nm. We achieve a power of 4.34 W at 980 nm in the CW operation regime with a fiber-coupled laser diode emitting 17.2 W at 914 nm. Furthermore, we demonstrate intracavity second-harmonic generation in the continuous-wave mode with a power of 893 mW at 492.5 nm using a BiB₃O₆ (BiBO) nonlinear crystal. The fluctuation of the blue output power was better than 3.57%. The M₂ factors are about 1.15 and 1.18 in the X and Y directions, respectively.     

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

It is reported that efficient continuous-wave (CW) self-frequency-doubling green laser at 530 nm performed with a diode-pumped Nd³⁺:YCa₄O(BO₃)₃ (Nd:YCOB) laser. With a diode pump power of 14.3 W, TEM₀₀ mode green laser at 530 nm of 1.07 W is obtained. At the output power level of 1.07 mW, the output stability is better than 5%. The beam quality M² value is about 1.37. To the best of our knowledge, this is the highest power laser at 530 nm generated by self-frequency doubling of a diode pumped Nd:YCOB laser.     

Diode-pumped Yb:GSO-LBO laser at 544 nm

We report a green laser at 544 nm generation by intracavity frequency doubling of a continuous wave (CW) laser operation of a 1088 nm Yb:GSO laser under in-band diode pumping at 940 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 17.8 W, as high as 444 mW of CW output power at 544 nm is achieved. The fluctuation of the green output power was better than 4.6% in the given 4 h.     

Diode-pumped Nd:YCOB self-frequency-doubling blue laser at 468 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.     

Efficient intracavity second-harmonic generation at 930 nm in a BiB<Subscript>3</Subscript>O<Subscript>6</Subscript> crystal

It is reported that efficient continuous-wave (CW) blue laser generation at 465 nm in a BiB₃O₆ (BiBO) crystal at type-I phase matching direction performed with a diode-pumped Nd³⁺:YAlO₃ (Nd:YAP) laser. With incident pump power of 18.4 W, output power of 823 mW at 465 nm has been obtained using a 10 mm-long BiBO crystal. At the output power level of 823 mW, the output stability is better than 2.3%.     

CW laser at 484 nm based on frequency-doubled diode-pumped Yb:YAG crystal

We report for the first time, to the best of our knowledge, a Yb:YAG laser operating in a CW on the three-level laser at 968 nm, based on the ² F _5/2-² F _7/2 transition, generally used for a 1030 nm emission. The use of a pump module with 16 passes through the crystal allowed the realization of a Yb:YAG thin-disk laser with 507 mW of continuous wave (CW) output power at 968 nm. Moreover, intracavity second-harmonic generation (SHG) has also been achieved with a power of 58 mW at 484 nm by using a BiB₃O₆ (BIBO) non-linear crystal.