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We designed, fabricated and tested a compact AWG-based true-time delay chip for optically-assisted radio beamforming. Beam steering is performed remotely by only tuning the laser wavelength. We demonstrated beamforming of a 2.5-Gbps, 10 GHz signal with 2.7o/nm discrete-step beam steering.
The electrically-controlled optical phase shifter (ECO-PS) is proposed and experimentally investigated for broadband radio orbital angular momentum mode generation. ECO-PS can offer the same advantages as optical true time delay schemes while avoids their phase-frequency dependence.
A hybrid fiber-wireless in-home network is proposed to support high-speed multiple input and multiple output (MIMO) orthogonal frequency division multiplexing systems operating at millimeter wave (mm-wave) band by employing optical heterodyne (OH) and polarization multiplexing (PolMux). OH enables the optical generation of mm-wave signals without the intrinsic frequency limitation of electrical local...
A simple and low cost remote up conversion (RUC) scheme is proposed using only one optical modulator. The baseband (BB) data and local oscillator (LO) signal are electrically coupled to drive a commercial intense modulator (IM). The laser source and IM can be shared by both BB data and LO signal. With less than 0.3dB power penalty, the 2.5Gbps on-off keying (OOK) data over 50km single mode fiber (SMF)...
We introduce a cost-effective OCDMA/RoF system on PON for broadband service delivery independent of the user’s location. Successful simulation results on 16-QAM transmitted downstream at 250 MS/s are discussed.
A novel all-optical wavelength converter based on cross-polarization modulation in a single semiconductor optical amplifier is presented. Error-free inverted and non-inverted wavelength conversion is demonstrated at a bit-rate of 10 Gbit/s.
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