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A distributed feedback semiconductor optical amplifier (DFB-SOA) based optical vector network analyzer (OVNA) is proposed. The proposed OVNA is realized by mapping the transmission response of the optical device under test (ODUT) into electrical domain. The key principle of the OVNA is the optical carrier recovery resulted by the DFB-SOA. Using the proposed OVNA, the transmission spectrum of an optical...
Real-time THz-wave wireless OFDM communication, which is assisted by optical technology, is reported. A 4 × 10 Gbit/s THz-wave OFDM signal is transferred into an optical OFDM signal, and the optical OFDM signal is successfully demultiplexed into four sub-carrier channels with an integrated-optic DFT circuit.
We present channel multiplexing with a single optical intensity modulator by incorporating tandem optical single-sideband modulation and orthogonal multiplexing technique with DSP-assisted coherent detection. Quality factor above 6 is demonstrated experimentally for all BPSK channels.
A simple and effective technique to realise optical single sideband modulation in a very wide RF/microwave frequency range is presented. It uses low-cost off-the-shelf components to realise single sideband modulation with a large sideband suppression ratio. Experimental results demonstrate single sideband modulation with more than 30 dB unwanted sideband suppression in a wide 2–40 GHz frequency range.
We report a fully integrated microwave photonic passband filter on a silicon photonic chip. The on-chip integrated microwave photonic filter (IMPF) consists of a high-speed phase modulator (PM), a thermally tunable high-Q micro-disk resonator (MDR), and a high-speed photodetector (PD). The bandpass filtering function of the IMPF is implemented based on phase modulation and phase-modulation to intensity-modulation...
An electro-optic chaos generator is proposed based on phase modulation to intensity modulation conversion and an analog-digital hybrid feedback loop. The analog part takes the digital sequences from shift registers as input and converts them into analog noise like signal, from which new bits are determined. The effective bandwidth and complexity of the output analog signal can reach a high level with...
A novel optically tunable frequency-multiplying optoelectronic oscillator (OEO) to generate a high frequency microwave signal without employing an optical filter is proposed. The upper dual parallel Mach-Zehnder modulator (DP-MZM) integrated in a dual-polarization quadrature phase shift-keying (DP-QPSK) modulator is accurately biased to serve as an equivalent phase modulator (e-PM), which functions...
A new method of microwave photonic filter (MPF) with widely tunable passband is proposed and experimentally proved by using an optical-injected Fabry-Perot laser diode. It is based on the basic principle that the FP laser wavelength selectively amplified under optical injection. By applying the optical wave from a tunable-laser source (TLS) to the PM, a phase modulated optical signal is generated,...
We propose and verify a scheme to both improve the gain and linearity of the downconverted analog photonic link. We utilize the different electro-optic coefficients of the phase modulator to realize the suppression of the third-order intermodulation distortion. And the link gain is improved by full spectrum utilization. The simulation results show that the SFDR is improved by ∼14dB. And the link gain...
We demonstrate experimentally, for the first time, the photonic generation of a continuous tunable THz wireless signal based on using an optical phase lock loop (OPLL) subsystem and optical frequency comb generator (OFCG). The OPLL is employed to select one line from the optical comb and shift it by the desired frequency offset allowing for the frequency tuneability of THz carrier signal. The selected...
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