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Mutual information in weak‐coherent‐state detection using a homodyne optical costas loop with different phase errors
Author(s) -
López Josue A.,
Garcia Edith,
Arvizu Arturo,
Mendieta Francisco J.,
Gallion Phillipe,
Conte Roberto
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27459
Subject(s) - direct conversion receiver , homodyne detection , physics , modulation (music) , phase modulation , mutual information , coherent states , phase (matter) , optics , microwave , phase shift keying , detector , electronic engineering , computer science , mathematics , phase noise , telecommunications , quantum , engineering , quantum mechanics , statistics , bit error rate , acoustics , channel (broadcasting)
A free‐space experimental set‐up for measuring the quadrature components of weak‐coherent‐state laser signals, based on a homodyne Costas loop configuration is presented. Loop parameters are optimized as a trade‐off between quantum and phase noises. Using binary phase‐shift‐keying modulation, measurements on the mutual information are presented for different photon numbers and phase errors. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:769–772, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27459