Yellow and infrared self-frequency conversions in GdAl3(BO3)4:Nd3+ -: art. no. 013503

We have demonstrated two self-frequency conversions from the bifunctional laser and optical nonlinear GdAl3(BO3)(4):Nd3+ crystal. For the first one, the laser operated in a dual-wavelength mode in the F-4(3/2)-->I-4(11/2) (at 1062 nm) and F-4(3/2)-->I-4(13/2) (at 1338 nm) channels, under a fixed wavelength pumping (at 747.7 nm) and with a fixed crystal orientation (28.5degrees). Then the self-sum frequency mixing 1/1062+1/1338-->1/592 process occurred, leading to a weak yellow beam at 592 nm. In the second self-frequency conversion, the Nd3+:GdAl3(BO3)(4) laser operated in a single wavelength mode at 1062 nm. Then the self-difference frequency mixing process 1/lambda(P)-1/1062=1/lambda(I) occurred at a 29.9degrees phase matching angle. The idler wavelength lambda(I) was tunable in the 2450-2600 nm range, due to the tunability of the lambda(P) pump wavelength. The highest yield was 0.12%. New Sellmeier formulas valid at least up to 2600 nm have been established. (C) 2005 American Institute of Physics.