Abstract
We proposed and experimentally demonstrated a novel and simple method to realize D-band millimeter-wave (mm-wave) single-sideband (SSB) vector signal generation using cascaded one single-drive Mach-Zehnder modulator (MZM) and one push-pull MZM. After the first MZM driven by a radio frequency (RF) signal of 20-GHz, an optical frequency comb (OFC) with six flat carriers was successfully generated. Using the subsequent push-pull MZM driven by 10-GHz SSB vector signals and a photodiode (PD) for detection, we finally generated D-band SSB vector mm-wave signals at frequencies of 130-GHz and 150-GHz, respectively. The experimental results are well consistent with theoretical and simulation analysis. Based on the proposed scheme, 4-Gbaud generated D-band quadrature phase shift keying (QPSK) and 16 quadrature amplitude modulation (16QAM) mm-wave signals were transmitted over 10-km/25-km single-mode-fiber (SMF) and 1-m wireless links. The bit-error-rate (BER) performance can reach less than 7% hard-decision forward-error-correction (FEC) threshold of 3.8 × 10−3.
Highlights
Radio-over-fiber (ROF) is a technology for radio access networks that integrates fiber optics and wireless data transmission in order to fulfill the tremendous demand for high-speed and large-capacity wireless applications
We proposed and experimentally demonstrated a novel and simple method to realize D-band millimeter-wave single-sideband (SSB) vector signal generation using cascaded one single-drive Mach-Zehnder modulator (MZM) and one push-pull MZM
Even-order and undesired sidebands are all suppressed in this process, which reduces the number of tones into a subsequent polarization-maintaining erbiumdoped fiber amplifier (PM-EDFA) and increases the power efficiency in the PM-EDFA amplification process
Summary
Radio-over-fiber (ROF) is a technology for radio access networks that integrates fiber optics and wireless data transmission in order to fulfill the tremendous demand for high-speed and large-capacity wireless applications. As a key technology in ROF systems, millimeter-wave (mmwave) signal (30 GHz–300 GHz) generation has been widely investigated because mm-wave has abundant bandwidth and it can achieve a high transmission rate [1]–[4]. To best of our knowledge, it is the first time to realize the D-band vector mm-wave generation with optical combs and SSB modulation using cascaded intensity modulators. This is a promising technology for ROF systems in 5th-generation (5G) and even next-generation communication, since it simplifies DSP process of the transmitter end, increases the flexibility of mm-wave frequencies generation and boosts the bandwidth as well as the transmission rate
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