We review the research and development of beyond Pb/s capacity space-division-multiplexed transmission technology using multi-core optical fibers for satisfying the ever-increasing traffic demand. Moreover, we present...We review the research and development of beyond Pb/s capacity space-division-multiplexed transmission technology using multi-core optical fibers for satisfying the ever-increasing traffic demand. Moreover, we present an optical packet and circuit integrated network technology to improve switching capacity and flexibility in network nodes for the rapid traffic fluctuation and the data service diversification.展开更多
The bonded distributed feedback（DFB） fiber laser（FL） acoustic emission sensor and the intensity response of the DFB-FL to external acoustic emissions are investigated. The dynamic sensitivity of the DFB-FL is cali...The bonded distributed feedback（DFB） fiber laser（FL） acoustic emission sensor and the intensity response of the DFB-FL to external acoustic emissions are investigated. The dynamic sensitivity of the DFB-FL is calibrated by a referenced piezoelectric receiver. In the DFB-FL we used here, the minimum detectable signal is2 × 10^（-6）m∕s at 5 kHz. Using wavelet packet technology, the collected signals are analyzed, which confirms that an intensity-modulated DFB-FL sensor can be used to detect acoustic emission signals.展开更多
文摘We review the research and development of beyond Pb/s capacity space-division-multiplexed transmission technology using multi-core optical fibers for satisfying the ever-increasing traffic demand. Moreover, we present an optical packet and circuit integrated network technology to improve switching capacity and flexibility in network nodes for the rapid traffic fluctuation and the data service diversification.
基金supported by the National 863 Program of China(No.2014AA093406)the Youth Innovation Promotion Association of CAS(No.2016106)+1 种基金the Project of Observation Instrument Development for Integrated Geophysical Field of China Mainland(No.Y201606)the Key Project of Hebei Educational Committee(No.BJ2016048)
文摘The bonded distributed feedback（DFB） fiber laser（FL） acoustic emission sensor and the intensity response of the DFB-FL to external acoustic emissions are investigated. The dynamic sensitivity of the DFB-FL is calibrated by a referenced piezoelectric receiver. In the DFB-FL we used here, the minimum detectable signal is2 × 10^（-6）m∕s at 5 kHz. Using wavelet packet technology, the collected signals are analyzed, which confirms that an intensity-modulated DFB-FL sensor can be used to detect acoustic emission signals.
