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A microwave-photonic sensor for remote water-level monitoring based on chaotic laser is proposed and demonstrated. The probe chaotic signal with bandwidth of 18 GHz is generated in the central office and then transmitted at the remote antenna unit after a 24 km single-mode fiber transmission. And the monitoring data from the remote antenna unit is sent back(More)
We propose and experimentally demonstrate a method for fault location in optical communication network. This method utilizes the traffic signal transmitted across the network as probe signal, and then locates the fault by correlation technique. Compared with conventional techniques, our method has a simple structure and low operation expenditure, because no(More)
We numerically demonstrate the enhancement of intergroup synchronization in a ring topology structure consisting of four semiconductor lasers (SLs) by asymmetric coupling. The lasers are divided into two groups, each of which consists of two non-adjacent lasers with the same optical frequency. We study the intergroup synchronization performance of symmetric(More)
Chaotic light has aroused considerable interest owing to its wide applications. Semiconductor laser, subject to optical feedback, optical injection, or optoelectronic feedback, can readily emit large-amplitude optical chaotic signals, and hence become the most suitable chaotic light sources. This paper illustrates the chaotic light generation based on(More)
We experimentally demonstrate a cost-effective method to locate faults in wavelength-division-multiplexing passive optical network (WDM-PON) utilizing a multiple-longitudinal-mode Fabry–Perot semiconductor laser directly modulated by chaotic wave from a Colpitts oscillator. Due to chaos modulation, every longitudinal mode of the laser has chaotic intensity(More)
An energy exchange relation of the permanent magnet synchronous motor control system is analyzed firstly. Then a novel control strategy using the rotor kinetic energy is proposed. A load estimation method is put forward for the load and inertia ripple. The simulation and experiment results demonstrate the effectiveness of the proposed control strategy and(More)