@article{2008-kim-meschede-opt-exp-v16-p16803, Abstract = {We have demonstrated a tunable single frequency source of continuous-wave (CW) coherent ultraviolet (UV) radiation at λ_3ω = 326 nm. Laser light of a tunable diode laser at λ_ω = 977 nm was split and injected into two independent fiber amplifiers yielding 1 W and 0.4 W, respectively. The 1 W branch was resonantly frequency doubled, resulting in 120 mW of useful power at λ_2ω = 488 nm. The third harmonic was generated by summation of the second branch of λ_ω and λ_2ω which were enhanced by a doubly resonant cavity. This light source has TEM_00 character and can be continuously tuned over more than 18 GHz. It is of interest for efficient laser cooling of In and potentially other applications.}, Author = {Kim, J. AND Meschede, D.}, Journal = {Opt. Express}, Pages = {16803}, Title = {{Continuous-wave coherent ultraviolet source at 326 nm based on frequency trippling of fiber amplifiers}}, Volume = {16}, Year = {2008} }