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Lenses for low-loss chip-to-fiber and fiber-to-fiber coupling fabricated by 3D direct-write lithography

: Dietrich, P.-I.; Reuter, I.; Blaicher, M.; Schneider, S.; Billah, M.; Hoose, T.; Hofmann, A.; Caer, C.; Dangel, R.; Offrein, B.; Möhrle, M.; Troppenz, U.; Zander, M.; Freude, W.; Koos, C.


Optical Society of America -OSA-, Washington/D.C.:
CLEO: Science and Innovations 2016 : Part of Conference on Lasers and Electro-Optics; San Jose, California, United States, 5-10 June 2016
Washington, DC: OSA, 2016
ISBN: 978-1-943580-11-8
ISBN: 978-1-5090-2434-6
Paper SM1G.4
Conference on Lasers and Electro-Optics - Science and Innovations (CLEO SI) <2016, San Jose/Calif.>
Fraunhofer HHI ()

We demonstrate low-loss coupling to single-mode fibers and photonic integrated circuits (PIC) using in-situ fabrication of free-form microlenses on device facets. Measured coupling losses down to 0.8 dB (0.5 dB) are achieved for chip-fiber (fiber-fiber) interfaces.