A real-time eye diagram monitoring method for optical signals is proposed and experimentally demonstrated based on sampling. In the system, under test are directly sampled by an sampling pulse train with a narrow width high repetition frequency. The achieved in Mach-Zehnder modulator (MZM), gated on-off electrical pulse. then broadened detected photodetector (PD). low-speed analog-to-digital co...

Two innovative optical fiber cable layouts designed to improve strain measurement accuracy for Brillouin Optical Time Domain Analysis (BOTDA) sensors through improved transfer efficiency are presented and discussed. Swept Wavelength Interferometry (SWI) is used experimentally evaluate their performance alongside analytical models numerical simulation Finite Element Method (FEM). The results sho...

In this paper, we proposed a novel structure for designing all optical filter based on photonic crystal structure. In designing the proposed filter, we simply employed a point defect localized between input and output waveguides as wavelength selecting part of the filter. The initial form of this filter is capable of selecting optical waves at =1560 nm, the transmission efficiency of the filte...