Abstract
A D-band vector millimeter wave (mm-wave) signal generation and propagation scheme employing cascaded intensity modulator (IM) and in-phase/quadrature (I/Q) modulator is proposed and implemented. In experiment, both the IM and I/Q modulator are operating on optical-carrier-suppressing (OCS) mode to generate two pairs of dual single-sideband (SSB) signals, and the undesired optical sidebands are not eliminated by an optical filter. For each pair of dual SSB signals, one is unmodulated the other is vector-modulated, they are located on both sides of the center suppressed carrier. After optical fiber transmission, SSB signals will beat with each other at the photoelectric detection end, thus the electrical mm-wave signals are generated. We experimentally demonstrated 2-Gbaud 16QAM, 4-Gbaud QPSK, and 8-Gbaud QPSK Radio-over-Fiber (RoF) transmission at 130-GHz over 22.5 km standard single mode fiber and 1 m wireless link with a Bit-Error-Rate (BER) under ${3}{{.8}} \times {1}{{0}^{{{ - 3}}}}$ .
Highlights
Radio-over-Fiber (RoF) or Terahertz-over-Fiber (ToF) system has become one of the promising candidate for the future high speed broadband access network [1], [2]
It is an effective way to meet the high-speed transmission demands to settle tens of gigabits per second peak throughputs [3], [4]. This is due to the photonics assisted millimeter wave or terahertz vector signal generation technologies that can effectively overcome the bandwidth bottleneck of electronic devices, and offer high modulation index with optical to tens of gigahertz conversion using photoelectric mixing, these techniques have been widely studied and applied in fiber wireless integration (FWI) system [5]–[8]
A 50-GHz cosine RF signal is generated and amplified by an electronic amplifier (EA) which has saturated output power of 28 dBm, and it directly drives on the intensity modulator (IM) which is biased at its minimal transmission point
Summary
Radio-over-Fiber (RoF) or Terahertz-over-Fiber (ToF) system has become one of the promising candidate for the future high speed broadband access network [1], [2]. It is an effective way to meet the high-speed transmission demands to settle tens of gigabits per second peak throughputs [3], [4]. This is due to the photonics assisted millimeter wave (mm-wave) or terahertz vector signal generation technologies that can effectively overcome the bandwidth bottleneck of electronic devices, and offer high modulation index with optical to tens of gigahertz conversion using photoelectric mixing, these techniques have been widely studied and applied in fiber wireless integration (FWI) system [5]–[8]. In references [10], Vol 12, No 2, April 2020
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