Abstract
Inthe work, we study and express a new wavelength-division-multiplexing passive optical network (WDM-PON) architecture with fiber fault protection. The designed optical network unit (ONU) module and periodic spectrum of 2 × N array waveguide grating (AWG) are applied to produce the self-protected mechanism. Here, we employ the free space optical communication (FSO)- and fiber-based connection between two adjacent ONUs to achieve signal relink. Moreover, the corresponding signal performances of downstream and upstream are also analyzed and discussed.
Highlights
R ECENTLY, due to the achievable demands of artificial intelligence (AI), cloud access, multi-service, big-data, 4K/8K video, and the online game, the reliable wavelengthdivision-multiplexing passive optical networks (WDM-PONs) should be an essential topic for higher capacity signal connection [1], [2]
In the OLT, the various wavelengths are used to connect to the 10 GHz Mach-Zehnder modulator (MZM) for generating a 10 Gbit/s on-off keying (OOK) modulation signal with a pattern length of 215
The designed optical network unit (ONU) module and the wavelength periodicity of 2×N array waveguide grating (AWG) at the remote node (RN) were applied in the presented WDM network to prevent the fiber breakpoint
Summary
R ECENTLY, due to the achievable demands of artificial intelligence (AI), cloud access, multi-service, big-data, 4K/8K video, and the online game, the reliable wavelengthdivision-multiplexing passive optical networks (WDM-PONs) should be an essential topic for higher capacity signal connection [1], [2]. In 2020, Yeh et al first demonstrated bidirectional 10 Gbit/s/λ on-off keying (OOK) ring-topology PON network by using time-division-multiplexing (TDM)-FSO access through 50 km fiber and 260 m FSO transmissions between two optical network units (ONUs) for fault protection [13], [14]. Mirza et al simulated a 5 Gbit/s/λ OOK self-protected polarization division multiplexing (PDM) WDM-PON with dual-path for fiber and FSO links between remote node (RN) and ONU for prevention [15]. After 50 km SMF transmission, the free space link lengths of 220 to 880 m can be reached based on the obtained redundant power
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