| Summary: | Wireless Gigabit (WiGig) is a recent wireless local area network that operates at the 60-GHz band and supports a transmission data rate of up to 20 Gbps. This paper demonstrates the generation of a V-band millimeter-wave (mmWave) signal using a new class of InAs/InP quantum-dash laser-based comb source operating in the L-band region. A 62.5-GHz mmWave signal is generated with electrical linewidth and phase noise characterization of 1 kHz and −65 dBc/Hz, respectively. Then, the transmission of the 6-Gbaud quadrature phase-shift keying (12 Gbps) signal is experimentally achieved over a hybrid radio-over-fiber (RoF) and radio-over-free-space (RoFSO) architecture comprising an 11.6-km single-mode fiber (SMF), 6-m FSO, and up to 2-m wireless link. Moreover, we also report this WiGig signal's transmission performance in terms of the measured bit error rate and error vector magnitude under various density smoke FSO channels, exhibiting a visibility range of <inline-formula><tex-math notation="LaTeX">$\sim$</tex-math></inline-formula>100 m for error-free transmission.
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