Fig. 4: Terabit-scale optical encryption for ultrahigh-speed information transmission.
From: Ultrahigh-speed optical encryption enabled by spatiotemporal noise chaffing
a Comparison of constellations for Monomodal OAM and CVW-multimodal OAM encryption under three different scenarios: without key, with correct key, and with false key. b Spectrum comparison for three different scenarios in CVW-multimodal OAM, demonstrating the decorrelation of pure and mixed signals. c Bar chart of Bit Error Rate (BER) under different signal waveform peak-to-peak voltages for VW-multimodal OAM and CVW-multimodal OAM, illustrating the minimal impact of noise-path introduction. d Experiment showing the isolation between different CVW-multimodal OAM combinations using PF-BER, revealing that increased weight variance and enlarged mode ED result in higher BER and false information reconstruction. e 8-wavelength multiplexing experiment, presenting ROP and BER for 40 GBaud 16-QAM signals, achieving a combined data rate of 1.25 Tb/s. f BER spatial distribution for Monomodal OAM and CVW-multimodal OAM, demonstrating that Monomodal OAM can successfully reconstruct information without decryption, whereas CVW-multimodal OAM effectively hides the information.
