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An 117 Gbit/s short range high speed optical interconnection using DMT modulation and adaptive DPD-PTS algorithm is proposed. By comparison with the traditional DPD algorithm, the simulation results show that the DPD-PTS used in the proposed scheme may achieve higher performance without complex equalization algorithm and dispersion compensation, and thus 117 Gbit/s DMT signal can be transmitted over...
In this paper, we proposed a bandwidth-variable TWDM access network structure which could simultaneously support upstream, downstream and peer-to-peer (PtP) communication directly inter ONUs based on the LCoS-based tunable bandwidth WSS in RN. The WSS improve the network flexibility due to its scalable technology and programmable filtering characteristics. Equivalent experiments are performed to demonstrate...
A 1×9 multiport spectrum cutter based on liquid crystal on silicon (LCoS) is proposed, fabricated, and demonstrated. As an LCoS-based optical processor, the spectrum cutter can realize fine control of filter attenuation (0∼30dB range) and phase (0∼2π) characteristics with minimum bandwidth of 15 GHz and maximum bandwidth of 5 THz across the C-band. The optical transfer function can be software-specified...
Inter-symbol interference (ISI) may become detrimental when the data rate rises in the atmospheric scattering UV channel. In this paper, we model the ISI effect due to delay spread in the UV channel and evaluate the approach of direct sequence spread spectrum (DSSS) in eliminating ISI and improve the system performance. Both the measured noise and newly reported experimental results of impulse response...
The paper presents a hybrid orthogonal frequency division multiplexing (OFDM) — wavelength division multiplexing (WDM) visible light communication (VLC). Direct detection is adopted in place of complex digital signal processing such as channel estimation and channel equalization, or even forward error corrections. Generic red, green and blue light emitting diodes (LED) are used for high-speed WDM...
In this paper, the influence of the mobility feature of a ultraviolet (UV) communication system is explored via experiments, the performance at four different relative speeds within different valid working distance ranges are tested. In order to get the maximum communication distance of our UV communication system, a large number of repeated tests are made at 5 meter intervals. Meanwhile, Selective...
We have proposed and successfully demonstrated a new architecture of MMW RoF system with wavelength reuse to deliver VHT data/video services. Based on PolM-to-IM conversion, frequency multiplied MMW (54.8-GHz) and intensity-free OC with slight phase fluctuation were received by adjusting PCs. 1.0-Gb/s OOK DS signal has been transmitted over 25-km SMF and air links. Meanwhile, successful transmission...
Intensifier Charge Couple Device (ICCD) is widely used in ultraviolet (UV) detection to amplify weak UV signal so that we can extract the target. While we amplify weak signals, inevitably the noise will also amplify. In this paper, according to the different characteristic of UV detection image, a Partial Differential Equation of Adaptive Median Filter (AMF-PDE) algorithm is proposed to process the...
In this paper, a method to improve the performance of Ultraviolet (UV) communication system without hardware enhancement in the optical link is presented and tested. Three kinds of noises are modeled and their impacts on the UV communication system are measured and analyzed. An FPGA-based moving average filter is utilized to reduce noise. In order to validate the designed filter, we implement a BER...
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