CW red light generated by intracavity frequency doubling of a 1329 nm Nd:CNGG laser with LBO

We report an efficient laser emission on the 1329 nm ⁴ F _3/2 to ⁴ I _13/2 transition in Nd:CNGG under the pump with diode laser at 885 nm. Continuous wave (CW) 3.37 W output power at 1329 nm is obtained under 17.4 W of incident pump power; the slope efficiency with respect to the incident pump power was 36.2%. Moreover, intracavity frequency doubling with LiB₃O₅ (LBO) nonlinear crystal yielded 822 mW of red light at 665 nm. An optical-to-optical efficiency with respect to the incident pump power was 4.7%.