Yellow and infrared self-frequency conversions in GdAl3(BO3)4:Nd3+

This is the authors' abstract. We don't add key points for this paper.

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 F3∕24→I11∕24 (at 1062nm) and F3∕24→I13∕24 (at 1338nm) channels, under a fixed wavelength pumping (at 747.7nm) and with a fixed crystal orientation (28.5°). Then the self-sum frequency mixing 1∕1062+1∕1338→1∕592 process occurred, leading to a weak yellow beam at 592nm. In the second self-frequency conversion, the Nd3+:GdAl3(BO3)4 laser operated in a single wavelength mode at 1062nm. Then the self-difference frequency mixing process 1∕λP−1∕1062=1∕λI occurred at a 29.9° phase matching angle. The idler wavelength λI was tunable in the 2450–2600nm range, due to the tunability of the λP pump wavelength. The highest yield was 0.12%. New Sellmeier formulas valid at least up to 2600nm have been established.