Visible Light Communication (VLC)

‌1.1 GHz of modulation bandwidth in LD based VLC without a limitation from the slow 3.8 MHz phosphor response. A high data transmission rate of 2 Gbit/s was achieved without an optical blue filter using OOK modulation scheme.

The figure on the right shows the latest advancements in Visible Light Communication (VLC).

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We demonstrate data transmission of unfiltered white light generated by direct modulation of a blue gallium nitride (GaN) laser diode (LD) exciting YAG:Ce phosphors. 1.1 GHz of modulation bandwidth was measured without a limitation from the slow 3.8 MHz phosphor response.

A high data transmission rate of 2 Gbit/s was achieved without an optical blue-filter using a non-return-to-zero on-off keying (NRZ-OOK) modulation scheme. The measured bit error rate (BER) of 3.50 × 10⁻³ was less than the forward error correction (FEC) limit of 3.8 × 10⁻³.

Visible Light Communication (VLC)

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Photonics Laboratory (Photonics)