All-in-one 4-telescope beam combination with a zig-zag array of waveguides
Diener R, Minardi S, Tepper J, Nolte S, Labadie L (2018)
Publication Type: Conference contribution
Publication year: 2018
Journal
Publisher: SPIE
Book Volume: 10015
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Edinburgh, GBR
DOI: 10.1117/12.2248393
Abstract
In this work we propose a new geometry of discrete beam combiners (DBC) for spectrally-resolved stellar interferometry which overcomes the limitations of previous designs. The new beam combiner is based on an array of coupled waveguides arranged in zig-zag pattern. It has been numerically optimized for the combination of 4 telescopes and engineered to operate in the L-band. We manufactured a first sample by direct laser writing in Gallium Lanthanum Sulfide glass, a highly transmissive material in the mid-infrared (550 nm to 10 ìm). Initial near-field characterization of the fabricated sample at a wavelength of 3.4 ìm are encouraging, but highlighted the necessity of a better control of the polarization dispersion of individual waveguides, as well as induced stresses from manufacturing process.
Involved external institutions
Germany (DE)How to cite
APA:
Diener, R., Minardi, S., Tepper, J., Nolte, S., & Labadie, L. (2018). All-in-one 4-telescope beam combination with a zig-zag array of waveguides. In Makenzie Lystrup, Giovanni G. Fazio, Howard A. MacEwen (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. Edinburgh, GBR: SPIE.
MLA:
Diener, Romina, et al. "All-in-one 4-telescope beam combination with a zig-zag array of waveguides." Proceedings of the SPIE Astronomical Telescopes and Instrumentation 2016, Edinburgh, GBR Ed. Makenzie Lystrup, Giovanni G. Fazio, Howard A. MacEwen, SPIE, 2018.
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