Abstract
We report the properties of a compact diode-pumped continuous-waveNd:GdVO4 laser with a linear cavity and different Nd-doped lasercrystals. In a 0.2 at.% Nd-doped Nd:GdVO4 laser, 1.54 W outputlaser power is achieved at 912 nm wavelength with a slope efficiency of24.8% at an absorbed pump power of 9.4 W. With 0.3 at.% Nd-dopingconcentration, we can obtain the either single-wavelength emission at1064 nm or 912 nm or the dual-wavelength emission at 1064 nm and 912 nmby controlling the incident pump power. From an incident pump power of11.6 W, the 1064 nm emission between 4F3/2 and4I11/2 is suppressed completely by the 912 nmemission between 4F3/2 and 4I9/2. We obtain 670 mWoutput of the 912 nm single-wavelength laseremission with a slope efficiency of 5.5% by taking an incident pumppower of 18.4 W. Using a Nd:GdVO4 laser with 0.4 at.% Nd-dopingconcentration, we obtain either the single-wavelength emission at1064 nm or the dual-wavelength emission at both 1064 nm and 912 nm byincreasing the incident pump power. We observe a strong competitionprocess in the dual-wavelength laser.
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