Mr. Jochem B. Lutgerink Profile

Jochem B. Lutgerink

at Technische Univ Delft

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Proceedings Article | 2 March 2020 Paper

Beam multiplexing for satellite communication optical feeder links

Fabrizio Silvestri, Federico Pettazzi, Martin Eschen, Jeroen Boschma, Jochem Lutgerink, Geerten F. I. Kramer, Wim Korevaar, Remco den Breeje, Cristina Duque, Niek Doelman

Proceedings Volume 11272, 1127213 (2020) https://doi.org/10.1117/12.2543035

KEYWORDS: Telescopes, Multiplexing, Multiplexers, Satellite communications, Diffraction gratings, Dense wavelength division multiplexing, Satellites, Diffraction, Modulation

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Optical satellite communication is growing fast and among various applications it requires higher throughput optical feeder links. Optical feeder links for satellite communication necessitate very high data throughput, up to 1 Terabit/s and beyond. Amongst several multiplexing strategies, dense wavelength division holds a key position to enable overall throughput rates above 1 Terabit/s. As a consequence, hardware architectures capable of handling high throughput links must be devised. Complementary to the high throughput requirement, the devices should also cope with the high optical power levels needed in optical ground stations. Combination of spatial aperture multiplexing and free space bulk optics configurations of multiplexers with transmission diffraction gratings are presented as possible concepts. Besides wavelength multiplexing, it is essential to include the beam propagation effects in the performance analysis, since this may affect the overall feeder link properties. A modelling framework is presented that covers the multiplexing behavior as well as the beam propagation of the transmission gratings based concept. The modelling framework based on first principles of optical diffraction is general, and independent of the grating choice. The results suggest that the design of a free space bulk multiplexer for optical feeder link must be approached already at system level. Decisions about telescope sizing, channels distribution and modulation formats may affect the performance of the multiplexer, resulting in severe effects on the link performance. The work discusses the effect of each design parameter and proposes design guidelines for high power satellite communication beam multiplexing.

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