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Wafer-level fabrication of microcube-typed beam-splitters by saw-dicing of glass substrate

: Baranski, M.; Bargiel, S.; Passilly, N.; Guichardaz, B.; Herth, E.; Gorecki, C.; Jia, C.; Frömel, J.; Wiemer, M.


IEEE Photonics Technology Letters 26 (2014), Nr.1, S.100-103
ISSN: 1041-1135
Fraunhofer ENAS ()

This letter reports on the development of an integrated micro-optical beam splitter that can be array-arranged. The proposed wafer-level fabrication, based on 45° saw-dicing of glass substrates, allows rapid and low-cost processing. In particular, it leads to high compactness and possibility of wafer-level alignment/assembly, suitable for vertically integrated imaging micro-instruments. The device, including additional out-of plane reflection for extraction of sensing beam, can be as small as 1 mm3.