A Hybrid Internet/CATV/5G Fiber-FSO Integrated System With a Triple-Wavelength Polarization Multiplexing Scenario

A hybrid Internet/cable television (CATV)/5G fiber-free-space optical (FSO) integrated system with a triple-wavelength polarization multiplexing scenario is attainably demonstrated for the first time. In a triple-wavelength polarization multiplexing scenario with vestigial sideband (VSB) four-level...

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Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.151023-151033
Main Authors: Li, Chung-Yi, Wu, Hsiao-Wen, Lu, Hai-Han, Tsai, Wen-Shing, Tsai, Song-En, Xie, Jing-Yan
Format: Article
Language:English
Subjects:
Adaptive optics
Bandpass filters
Bit error rate
Cable TV
Channel capacity
Constellations
Fiber-FSO integrated system
Internet
Multiplexing
Optical communication
Optical fiber polarization
Optical filters
Optical polarization
optical VSB filter
Orthogonal Frequency Division Multiplexing
Polarization
polarization multiplexing scenario
Pulse amplitude modulation
Quadrature amplitude modulation
triple-wavelength
tunable optical band-pass filter
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Summary:A hybrid Internet/cable television (CATV)/5G fiber-free-space optical (FSO) integrated system with a triple-wavelength polarization multiplexing scenario is attainably demonstrated for the first time. In a triple-wavelength polarization multiplexing scenario with vestigial sideband (VSB) four-level pulse amplitude modulation (PAM4)/CATV/16-quadrature amplitude modulation (QAM)-orthogonal frequency-division multiplexing (OFDM) modulation, the channel capacity is considerably multiplied and the overall performance is significantly improved. With a tunable optical band-pass filter, polarization-tracking free de-multiplexing is attained by removing other wavelengths with different polarizations, and the optical VSB PAM4/CATV/16-QAM-OFDM signal is created by partially reducing the optical signal's linewidth. Compared with established polarization multiplexing fiber-FSO integrations with complex polarization de-multiplexing mechanism, it demonstrates a notable one with the benefits of simplicity and flexibility. Sufficiently low bit error rate, acceptable PAM4 eye diagrams, clear constellation map, and high composite second-order/composite triple beat values are attained through a 40 km single-mode fiber transport with 200 m free-space link. This demonstrated triple-wavelength polarization multiplexing fiber-FSO integrated system is promising because it not only incorporates fiber backhaul with optical wireless feeder, but it also simplifies system's structure and enhance system's overall performance.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2947623