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A WDM PAM4 FSO–UWOC Integrated System With a Channel Capacity of 100 Gb/s.
- Source :
- Journal of Lightwave Technology; 4/1/2020, Vol. 38 Issue 7, p1766-1776, 11p
- Publication Year :
- 2020
-
Abstract
- A wavelength-division-multiplexing (WDM) four-level pulse amplitude modulation (PAM4) free-space optical (FSO)–underwater wireless optical communication (UWOC) integrated system with a channel capacity of 100 Gb/s is proposed and attainably demonstrated. Analytic results reveal that 1.8-GHz 405-nm blue-violet-light and 1.7-GHz 450-nm blue-light laser diodes (LDs) with two-stage light injection and optoelectronic feedback techniques are competently adopted for 100 Gb/s PAM4 signal transmission through a 500-m free-space transmission with 5-m clear ocean underwater link. Combining dual-wavelength WDM scenario with PAM4 modulation, the channel capacity of FSO–UWOC integrated systems is significantly enhanced with an aggregate transmission rate of 100 Gb/s (25 Gbaud PAM4/wavelength × 2 wavelengths). With doublet lenses in FSO, laser beam reducer and transmissive spatial light modulator in UWOC, a sufficiently low bit error rate of 10−9 and acceptable PAM4 eye diagrams are acquired. This demonstrated 100 Gb/s PAM4 FSO–UWOC integrated system with a WDM scenario is advantageous for the enhancement of a high-speed optical wireless link with long-reach transmission. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07338724
- Volume :
- 38
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of Lightwave Technology
- Publication Type :
- Academic Journal
- Accession number :
- 142892306
- Full Text :
- https://doi.org/10.1109/JLT.2019.2960525