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SIPM-OOFDM having an extra subcarrier index-power information-bearing dimension is, for the first time, proposed and investigated, which, compared to conventional OOFDM, offers considerable signal transmission capacity improvement without degrading system power budget and dispersion/nonlinearity tolerances.
Real-time instruments that acquire large data sets are needed for detection and classification of outliers. A new class of high throughput real-time instruments based on the photonic time-stretch has led to the discovery of optical rogue waves [1], detection of rare cancer cells [2], and the highest analog-to-digital conversion performance ever achieved [3]. One example of these instruments is the...
We propose a transmission system based on stimulated Brillouin scattering (SBS) effect and injection locked distributed-feedback (DFB) laser to achieve optical single sideband (OSSB) modulation.
DDS sources were developed in NIM for impedance measurements. Stable and accurate phase difference can be obtained easily by this technique. It has been used for mutual inductance measurements and an uncertainty of 1×10-7 has been obtained.
A chirped single bandpass microwave photonic filter based on a broadband optical source, a Mach-Zehnder interferometer and a dispersive element is proposed. Special and unique features are shown such as the capacity of modifying the chirp in the passband using the dispersive element together in combination with the possibility of tunability and reconfigurability. The later features are achieved by...
We have demonstrated optical OFDM signal generation by an optical phase modulator and applied it in a 40 GHz ROF symmetric system. The power penalty for the downlink data after transmission over 50 km SMF is smaller than 0.5 dB; while for the up-link data, the power penalty can be neglected.
We demonstrated a novel architecture for seamless integration ROF with OFDM-WDM-PON based on an integrated external modulator. The 10 Gbit/s wired signal, 2.5 Gbit/s wireless signal and upstream signal has been transmitted over 20 km SMF successfully.
We experimentally demonstrate all-optical up-conversion of radio-over-fiber signals based on a dual-pump four-wave mixing in an semiconductor optical amplifier for the first time. 2.5 Gbit/s baseband signals are successfully up-converted to 40-GHz millimeter-wave carrier.
We have theoretically investigated the transmission performance of the optical millimeter-waves (mm-waves) generated using intensity modulation via a Mach-Zehnder modulator, with the double and single sidebands (DSB and SSB) and optical carrier suppression (OCS) schemes. According to our theoretical analysis, fiber chromatic dispersion leads to fading effect and time shifting of the codes; therefore,...
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