Mechanically induced long‐period fiber grating array sensor

Abstract

This article presents the experimental characterization of a mechanically induced long-period fiber grating (MLPFG) array sensor for measuring the amplitude and width of an applied weight as well as detecting its position. The MLPFG array sensor consists of an optical fiber placed between a rubber cover and a 45-cm-long metal bar with round Figure 6 Far field intensity maps versus frequency and elevation angle h in E-plane and measured radiation patterns in E-and H-planes at maximum gain frequency for different bias voltage applied: (a and b) 0 V-1.9 GHz, (c and d) 5 V-2.02 GHz, (e and f) 12 V-2.16 GHz, and (g and h) 24 V-2.31 GHz. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com]ABSTRACT: Using a coplanar waveguide (CPW) feed with a shortcircuiting stub, the fed circular slot antenna for W-band operation is presented. The obtained results show that the impedance bandwidth, which is determined by 10 dB return-loss of the proposed slot antenna, can reach to 21% with the center frequency at 94 GHz (80 GHz-100 GHz), and the gain achieves 3.05 dBi at 92 GHz with good radiation performance.

An all-optical controlled attenuation effect in an all-fiber system based on ionic liquid-filled photonic bandgap fiber

“…The controlling technologies of conducting light in optical fibers play significant roles in both optical fiber communication systems and fiber sensing systems. The traditional controlling technologies are mainly based on electricity, mechanics or magnetism [1][2][3], which are technically mature and stable but sensitive to electromagnetic interference and lace of compactness. As a neotype technology, the all-optical controlling technology has been widely studied due to its small volume, immunity to electromagnetic interference and compatibility with optical networks [4][5][6][7][8][9][10][11][12][13].…”