Optical wireless communication at 100 Gb/s using L-band Quantum-dash laser

An indoor 100 Gb/s wireless communication is demonstrated using external coherent injection-locking of InAs/InP Quantum-dash (QDash) laser. Receiver power sensitivities of -18.4 dBm and -17.4 dBm at ~1621.3 nm are observed after propagating along a 2 m and 4 m indoor free-space channels, respectively, while adopting dual polarization quadrature phase shift keying (DP-QPSK) modulation scheme. Moreover, characterization of this far L-band QDash laser showed an injection locked Fabry-Perot mode tunability of ~19 nm with > 35 dB side-mode-suppression-ratio. To the authors' knowledge, this is the first demonstration of showcasing QDash lasers as a viable candidate in optical wireless communication, an attractive alternate optical access technology for next generation high capacity networks.