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Printed freeform lens arrays on multi-core fibers for highly efficient coupling in astrophotonic systems

Dietrich, Philipp-Immanuel; Harris, Robert J.; Blaicher, Matthias; Corrigan, Mark K.; Morris, Tim M.; Freude, Wolfgang; Quirrenbach, Andreas; Koos, Christian

Coupling of light into multi-core fibers (MCF) for spatially resolved spectroscopy is of great importance to astronomical instrumentation. To achieve high coupling efficiencies along with fill-fractions close to unity, micro-optical elements are required to concentrate the incoming light to the individual cores of the MCF. In this paper we demonstrate facet-attached lens arrays (LA) fabricated by two-photon polymerization. The LA provide close to 100% fill-fraction along with efficiencies of up to 73% (down to 1.4 dB loss) for coupling of light from free space into an MCF core. We show the viability of the concept for astrophotonic applications by integrating an MCF-LA assembly in an adaptive-optics test bed and by assessing its performance as a tip/tilt sensor.

Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Institut für Photonik und Quantenelektronik (IPQ)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1364/OE.25.018288
ISSN: 1094-4087
KITopen ID: 1000072538
HGF-Programm 43.23.03; LK 01
Erschienen in Optics express
Band 25
Heft 15
Seiten 18288-18295
URLs Link
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