A flexible bidirectional fiber-free-space optical (FSO)-fifth-generation (5G) wireless convergent system with 1-Gb/s/4.5-GHz sub-6 GHz and 10-Gb/s/28-GHz millimeter-wave (MMW) (downstream), as well as 10-Gb/s/24-GHz MMW (upstream) 5G hybrid data signals is built, employing a vertical cavity surface emitting laser (VCSEL)-based wavelength selector and a remotely injection-locked distributed feedback laser diode (DFB LD) for presentation. It is the first to adopt a VCSEL-based wavelength selector to adaptively provide 5G applications and an injection-locked DFB LD to perform a phase modulation-to-intensity modulation transformation with an optical-to-electrical conversion. Good bit error rate performance and acceptable eye diagrams are achieved over 25 km single-mode fiber transport, 600 m FSO link, and 10 m/4 m RF wireless transmission. Such demonstrated fiber-FSO-5G wireless convergent system is a promising one toward optical-based long-haul networks at comparatively high-speed operations. It exhibits an excellent convergence not only due to its development for incorporating optical fiber with optical/5G wireless networks, but also due to its enhancement for flexible two-way high-speed and long-haul communications.

中文翻译：

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灵活的双向光纤FSO-5G无线融合系统

灵活的双向无光纤空间光纤（FSO）第五代（5G）无线融合系统，具有1-Gb / s / 4.5 GHz低于6 GHz和10 Gb / s / 28 GHz毫米波（ MMW）（下游）以及10-Gb / s / 24-GHz MMW（上游）5G混合数据信号，采用基于垂直腔表面发射激光器（VCSEL）的波长选择器和远程注入锁定分布式用于演示的反馈激光二极管（DFB LD）。率先采用基于VCSEL的波长选择器来自适应地提供5G应用，并采用注入锁定DFB LD进行光电转换，以执行相位调制到强度调制转换。在25 km单模光纤传输，600 m FSO链路和10 m / 4 m RF无线传输中，可以获得良好的误码率性能和可接受的眼图。这种经过证明的FSO-5G光纤无线融合系统对于在相对较高的速度下运行基于光学的远程网络是很有前途的。它显示出出色的融合性，这不仅是由于其将光纤与光学/ 5G无线网络相结合的发展，而且还因为其对灵活的双向高速和长距离通信的增强而得到了体现。