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Multi-waveguide excitation in fs laser written waveguide arrays

: Szameit, A.; Hartung, H.; Dreisow, F.; Nolte, S.; Tünnermann, A.


Applied Physics. B 87 (2007), No.1, pp.17-20
ISSN: 0340-3793
ISSN: 0721-7269
ISSN: 0946-2171
ISSN: 1432-0649
Journal Article
Fraunhofer IOF ()

We introduce a new technique to excite multiple waveguides in fs laser written waveguide arrays. Using a microstructured grating, we were able to couple almost all of the power of the laser beam into multiple waveguides in one- and two-dimensional lattices. Tilting the sample a defined phase shift between adjacent waveguides can be obtained, which allows anomalous diffraction and refraction to be studied.