Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 041103 |
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<mark>Journal publication date</mark> | 24/07/2006 |
<mark>Journal</mark> | Applied Physics Letters |
Issue number | 4 |
Volume | 89 |
Number of pages | 3 |
Publication Status | Published |
<mark>Original language</mark> | English |
We report on the generation of continuous-wave (cw) ultraviolet (UV) laser light at λ=278 nm by optical frequency doubling of visible light in β-BaB2O4 waveguides. Ridge-type waveguides were produced by He+ implantation, photolithography masking, and plasma etching. The final waveguides have core dimension of a few μm2 and show transmission losses of 5 dB/cm at 532 nm and less than 10 dB/cm at 266 nm. In our first experiments, a second harmonic power of 24 μW has been generated at 278 nm in an 8 mm long waveguide pumped by 153 mW at 556 nm.