Figure 4
From: Ultrahigh-speed violet laser diode based free-space optical communication beyond 25 Gbit/s
Transmission performance of the VLD carried pre-leveled 64-QAM DMT data over 3 to 10 m. (a) The constellation plot, (b) the SNR spectra and (c) the BERs of 26.4-Gbit/s 64-QAM DMT data transmitting over 3 m, 5 m, 7 m and 10 m. (d) The constellation plot, (e) the SNR spectra and (f) the maximal data rate of 64-QAM DMT data transmitting over 3 m, 5 m, 7 m and 10 m.
