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Femtosecond laser-written quasi-phase-matched waveguides in lithium niobate

: Thomas, J.; Heinrich, M.; Burghoff, J.; Nolte, S.; Ancona, A.; Tünnermann, A.


Applied Physics Letters 91 (2007), No.15, 3 pp.
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IOF ()

We report on thermally stable optical waveguides written in periodically poled lithium niobate with a femtosecond laser using a two line approach. Both fundamental and second harmonic light at 1064 and 532 nm are guided with low damping losses. In a 10-mm-long sample a conversion efficiency of 58% was achieved.