Mobile devices equipped with geo-location modules facilitate researches on the nature of human mobility. While valuable contributions have been made to discover trajectory patterns from movement history, there are sti...
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In this letter, two kinds of continuous wavelength-tunable light sources are achieved and investigated experimentally using a self-seeding reflective semiconductor optical amplifier （RSOA）. Over 40 single mode wavel...
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In this letter, two kinds of continuous wavelength-tunable light sources are achieved and investigated experimentally using a self-seeding reflective semiconductor optical amplifier （RSOA）. Over 40 single mode wavelengths with 100 GHz spacing are generated by setting the parameters of the wavelength selective switch. The peak power of each wavelength reaches over 0.2 dBm with the signal-to-noise ratio （SNR） 〉 35 dB. The proposed schemes are appropriate for multi-wavelength-tunable light sources; the maximum number of wavelengths generated can reach to 4.
We propose and experimentally demonstrate mutual optical format conversion between signals characterized as 10-Gb/s nonreturn-to-zero on-off-keying (NRZ-OOK) and NRZ binary phase-shift keying (BPSK) *** conversion is ...
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We propose and experimentally demonstrate mutual optical format conversion between signals characterized as 10-Gb/s nonreturn-to-zero on-off-keying (NRZ-OOK) and NRZ binary phase-shift keying (BPSK) *** conversion is based on stimulated Brillouin scattering (SBS) in a single-mode optical *** OOK signal is converted into a BPSK signal through optical carrier absorption,for which a SBS loss of 30 MHz is used in long-haul *** converted BPSK signal is reverted to an OOK signal with a corresponding SBS gain of 30 MHz for direct *** proposed OOK-to-BPSK and BPSK-to-OOK format conversions can be implemented in transmitter and receiver nodes by using a laser source as the Brillouin pump.
We propose and experimentally demonstrate an asymmetrically side-coupled Sagnac-loop system on a silicon-on-insulator (SOI) platform. Diverse mode-splitting properties are obtained, with various transparency peaks bet...
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Using digital distortion, the Mach-Zehnder modulator nonlinearity is pre-compensated for direct detection OFDM system. The experiment and simulation results show that the method can extend the modulation index, improv...
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Adverse Drug Reactions (ADRs) has become a worldwide problem that draws the attention of people from all racial and ethnic groups. The number of deaths caused by ADRs has greatly increased and led to many drug withdra...
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Adverse Drug Reactions (ADRs) has become a worldwide problem that draws the attention of people from all racial and ethnic groups. The number of deaths caused by ADRs has greatly increased and led to many drug withdrawals in the last decades. Recent research findings indicate that most ADRs can be effectively prevented to some extent by using computer-aided information technologies. Though many spontaneous reporting systems (SRSs) have been built to enhance the pharma-covigilance, the ADRs data is still very sparse because the large amount of reports obtained from consumers contains insufficient hints to identify a possible causal relationship between an adverse event and drug. Based on this motivation, we developed Adverse-Tracking, a spontaneous reporting system of ADRs via crowd-sourcing. Our proposed system interacts with consumers through a Q&A interface and collects the ADR reports. The decision tree support vector machine (DTSVM) based on the genetic algorithm is used in our system to automate the Q&A procedure. We carried out experiments to evaluate the performance at Peking University First Hospital. As demonstrated by the results, our system is an efficient tool to track and discover adverse events in the consumers' reports of ADRs, which facilitates the detection of "signal".
We utilize frequency chirp magnification for enhancing the strain sensitivity of an FBG sensor. Ultra-highly sensitive strain measurement has been achieved with 5.40 pm/μΕ strain sensitivity, which has been enhanced...
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A novel training sequence is designed for symbol synchronization in IMDD optical OFDM. Accurate symbol synchronization is demonstrated based on symbol boundary detection and cross-correlation, which has the advantage ...
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A symmetric 40-Gb/s stacked WDM-OFDM-PON system by using our designed TBF for downstream wavelength selection and upstream chirp management is experimentally demonstrated. It can support 25-km fiber transmission with ...
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We propose and experimentally demonstrate a self-coupled microring resonator with multiple split resonances at certain wavelengths. By changing the phase shift along the feedback loop, variable numbers of split resona...
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