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We propose a novel high-capacity and low-latency front-haul system for small cells-based heterogeneous wireless networks. We experimentally demonstrate a proof-of-concept seamless convergence of radio-over-fiber (RoF) and millimeter-wave (MMW) system at 90 GHz for high-speed wireless signal transmission. Simultaneous transmission and demodulation of standard-compliant very-high-throughput WLAN IEEE...
We report on broadband comb generation using a combination of a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) and a dispersion-flattened dispersion-decreasing fiber (DF-DDF), as well as MMW signal generation using the MZ-FCG. For application of quantum cascade lasers operating in the THz range, phase-locking techniques are required to stabilize the frequency and the linewidth. Optical...
We demonstrated frequency tunable millimeter wave (MMW) pulse generation using a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG). The MMW pulse was generated by photomixing of a band-controlled pulse train and a single-mode light extracted from a comb signal generated by the MZ-FCG. The comb signal had a 12.5 GHz-spacing, 260 GHz-width, which was converted to a 3 ps-width pulse train by...
High-speed control of lightwave using electrooptic (EO) effect is investigated in this paper. Agile optical frequency shift can be achieved by optical single-sideband (SSB) and frequency-shift-keying (FSK) modulators, where high-speed optical phase-shift-keying (PSK) signals can also be generated by using FSK/SSB modulators. We also describe ultrahigh extinction ratio optical intensity modulation...
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