Coherent Combining at Ultra-low Optical Signal Powers based on Optically Amplified Error Feedback

Rasmus Larsson; Jochen Schröder; Magnus Karlsson; Peter Andrekson

doi:10.1364/OFC.2022.W2A.31

Optical Fiber Communication Conference (OFC) 2022
Technical Digest Series (Optica Publishing Group, 2022),
paper W2A.31
•https://doi.org/10.1364/OFC.2022.W2A.31

Coherent Combining at Ultra-low Optical Signal Powers based on Optically Amplified Error Feedback

Rasmus Larsson, Jochen Schröder, Magnus Karlsson, and Peter Andrekson

Optical Fiber Communication Conference 2022

San Diego, California United States
6–10 March 2022
ISBN: 978-1-55752-466-9

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Poster Session I (W2A)

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R. Larsson, J. Schröder, M. Karlsson, and P. Andrekson, "Coherent Combining at Ultra-low Optical Signal Powers based on Optically Amplified Error Feedback," in Optical Fiber Communication Conference (OFC) 2022, S. Matsuo, D. Plant, J. Shan Wey, C. Fludger, R. Ryf, and D. Simeonidou, eds., Technical Digest Series (Optica Publishing Group, 2022), paper W2A.31.

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Abstract

Coherent combining in multi-aperture reception for free-space communication applications requires active phase alignment. Here, using 50/50-fiber-couplers and optically preamplified error feedback, coherent combining of four −80dBm, 10Gbaud QPSK signals is demonstrated with 95.4% efficiency.

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