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. 2015 Dec 21;5:18690. doi: 10.1038/srep18690

Figure 6. The blue LD with phosphorous diffuser for optical wireless QAM OFDM communication.

Figure 6

(a) The frequency response of the blue LD without and with phosphorous diffuser. (b) The constellation plots and related subcarrier SNRs of the 4-Gbit/s 16-QAM OFDM data carried by the proposed white-light source. (c) The BER of phosphorous diffuser adhered blue LD delivered 16-QAM OFDM data at different bandwidths. (d) The subcarrier SNRs and related constellation plot of the 5.2-Gbit/s 16-QAM OFDM data carried by the proposed white-light source.