Printed freeform lens arrays on multi-core fibers for highly efficient coupling in astrophotonic systems
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 indi...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
24 Jul 20
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| In: |
Optics express
Year: 2017, Volume: 25, Issue: 15, Pages: 18288-18295 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/OE.25.018288 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1364/OE.25.018288 Verlag, Volltext: https://www.osapublishing.org/abstract.cfm?URI=oe-25-15-18288 
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| Author Notes: | Philipp-Immanuel Dietrich, Robert J. Harris, Matthias Blaicher, Mark K. Corrigan, Tim J. Morris, Wolfgang Freude, Andreas Quirrenbach, and Christian Koos |
| Summary: | 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% fillfraction 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. |
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| Item Description: | Gesehen am 14.11.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/OE.25.018288 |