Laser transmission of quantum bits and multi-tera-bits over multi-hop satellite orbital constellations

Maximillian Koegler; Joachim Horwath; Carsten Fechtmann; Le Nguyen Binh; Axel Hof; Federica Bonomo

doi:10.1117/12.2651148

15 March 2023 Laser transmission of quantum bits and multi-tera-bits over multi-hop satellite orbital constellations

Maximillian Koegler, Joachim Horwath, Carsten Fechtmann, Le Nguyen Binh, Axel Hof, Federica Bonomo

Proceedings Volume 12413, Free-Space Laser Communications XXXV; 1241309 (2023) https://doi.org/10.1117/12.2651148
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We present the transmission of continuous variable quantum key distribution (CV-QKD) qubits, ultra-high capacity of multi-tera bits over atmospheric and inter-satellite channels via the C-band. With the aid of advanced modulation formats and modern photonic technologies, we argue that multi-satellite jumps are both feasible and realizable. Photonic transceivers utilizing photonic integrated circuits in Silicon and InP technology of electro-absorption modulation lasers are presented. It is shown that optical amplification techniques, booster power amplifiers, and highly sensitive optical preamplifiers can compensate for exceedingly high attenuation of links between optical ground stations and satellites with all optical routing and link distances of 12,000 to 45,000 km. The digital signal processing algorithms in coherent receivers for ultra-high capacity and ultra-low power quantum bit systems are demonstrated to play a critical role in system performance. We specifically provide a Nyquist-equivalent sampling theorem that studies the quantum bit error rate based on both the Nyquist sampling theorem and the Heisenberg uncertainty principle. Furthermore, the Nyquist pulse shaping method and constellation probability shaping are used to maximize tera-bit transmission over spatial channels.

Conference Presentation

Citation Download Citation

Maximillian Koegler, Joachim Horwath, Carsten Fechtmann, Le Nguyen Binh, Axel Hof, and Federica Bonomo "Laser transmission of quantum bits and multi-tera-bits over multi-hop satellite orbital constellations", Proc. SPIE 12413, Free-Space Laser Communications XXXV, 1241309 (15 March 2023); https://doi.org/10.1117/12.2651148

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