A PDM-based 128-Gb/s PAM4 fibre-FSO convergent system with OBPFs for polarisation de-multiplexing
| Autor: | Yong-Cheng Huang, Chung Yi Li, Shi-Cheng Tu, Hsiao-Wen Wu, Hai-Han Lu, Qi-Ping Huang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Computer science
lcsh:Medicine 02 engineering and technology Interference (wave propagation) 01 natural sciences Multiplexing Article 010309 optics Channel capacity Engineering 020210 optoelectronics & photonics Optical Carrier transmission rates 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electronic engineering Lasers LEDs and light sources Optical techniques lcsh:Science Multidisciplinary lcsh:R Electrical and electronic engineering Aerospace engineering Optics and photonics Transmission (telecommunications) Modulation Pulse-amplitude modulation Optical wireless lcsh:Q |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-9 (2020) Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-020-58558-7 |
| Popis: | A polarisation-division-multiplexing (PDM)-based four-level pulse amplitude modulation (PAM4) fibre-free-space optical (FSO) convergent system with optical band-pass filters (OBPFs) for polarisation de-multiplexing is feasibly demonstrated for the first time. In a PDM scenario with PAM4 modulation, the transmission capacity of fibre-FSO convergent systems is enhanced four times with an aggregate channel capacity of 128 Gb/s (64 Gb/s PAM4/polarisation × 2 polarisations). With an OBPF, polarisation-tracking free de-multiplexing is attained by eliminating other optical carrier with orthogonal polarisation. An OBPF is a simple polarisation de-multiplexing scheme in which the polarisation-orthogonal carrier can be effectively de-multiplexed and the cross-polarisation interference can be nearly eliminated. Compared with traditional PDM-based fibre-FSO convergent systems with sophisticated polarisation-tracking mechanism and elaborate digital signal processing (DSP) approach, it reveals a noteworthy one with the advantage of simplicity. Through 25 km single-mode fibre transport and 500 m FSO link, sufficiently low bit error rate and qualified PAM4 eye diagrams are attained. This proposed polarisation-tracking free PDM-based fibre-FSO convergent system is notable because it not only incorporates the fibre backbone and optical wireless feeder, but it also simplifies the framework since complicated polarisation-tracking mechanism and DSP approach are not involved. |
| Databáze: | OpenAIRE |
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