> https://purelifi.com/lifi-products-2/
Seems more for distances shorter than a simple cable run to the next house or business parcel. The non-RF part is nice, but still... TEMPEST. And military marketing means consumer priced out, but worth inquiring. Optics/RF are more for where you can't run fiber/copper, can't run fiber/copper cheaply, need unique range or altitude solutions, need to be transient or discreet, or diversity in hop tech, etc. Perhaps point is, in a p2p meshnet, reliability and speed of fiber/copper come first choice. > https://www.ofcconference.org/en-us/home/news-and-press/press-releases/improvements-to-free-space-optical-networks-enable/ > i am having trouble finding more detail on this system China's researchers are working on some cool stuff, try writing her to ask for a list of papers, request ones of interest, and links to their favorite hopefully open paper repos... [email protected] Yueying Zhan Key Laboratory of Space Utilization, Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China https://www.researchgate.net/profile/Yueying-Zhan https://www.spiedigitallibrary.org/profile/Yueying.Zhan-145918 https://www.researching.cn/EN/SearchArticle https://icicn.org/ https://www.wocc.org/ https://icact.org/ https://www.atlantis-press.com/ Proceedings Article | 17 April 2020 Paper 1.12Tbit/s (10x112Gbit/s) coherent free space optical communication using DP-QPSK and WDM technology Ziyuan Shi, Yueying Zhan, Jian Xiong Proc. SPIE. 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications KEYWORDS: Transmitters, Modulation, Polarization, Wavelength division multiplexing, Receivers, Telecommunications, Free space optics, Dense wavelength division multiplexing, Free space optical communications A 1.12Tb/s FSO communication system with WDM and DP-QPSK is proposed. The performances of the system in case of sunny, rainy, foggy under 50GHz, 100GHz and 200GHz channel spacing are simulated and analyzed. SPIE Journal Paper | 1 August 2016 Optical encryption of parallel quadrature phase shift keying signals based on nondegenerate four-wave mixing in highly nonlinear fiber Yue Cui, Min Zhang, Yueying Zhan, Danshi Wang, Shanguo Huang OE Vol. 55 Issue 08 KEYWORDS: Phase shift keying, Modulation, Nonlinear optics, Four wave mixing, Optical networks, Signal processing, Computer security, Optical engineering, Network security, Optical communications A scheme for optical parallel encryption/decryption of quadrature phase shift keying (QPSK) signals is proposed, in which three QPSK signals at 10 Gb/s are encrypted and decrypted simultaneously in the optical domain through nondegenerate four-wave mixing in a highly nonlinear fiber. The results of theoretical analysis and simulations show that the scheme can perform high-speed wiretapping against the encryption of parallel signals and receiver sensitivities of encrypted signal and the decrypted signal are −25.9 and −23.8 dBm, respectively, at the forward error correction threshold. The results are useful for designing high-speed encryption/decryption of advanced modulated signals and thus enhancing the physical layer security of optical networks.
