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Water is a basic necessity of life. Plant need water to ensure their continuity. Hybrid water pump system flow the water from lake assisted by sun light for its operation via solar panels. The battery is connected in order to operate the pump during the night or cloudy day conditions. The system work by itself due to simple physics concept together with the development of electronic intelligent controller...
Cracking is a widely existent issue for any infrastructures that may lead to its advanced failure. In every infrastructure it is important to make sure that the cracks can be detected and monitored earlier in order to avoid any unwanted incident or any deformation of structures. Recently, Fibers Bragg gratings (FBGs) are growing interest in sensing applications such as in aerospace, military, structural...
A dual-wavelength hybrid Raman-erbium doped fiber ring laser is proposed and demonstrated. By tapering a section of erbium doped fiber ends with two-taper successively, the fiber laser can lase two wavelengths at 1563.08 nm (laser 1) and 1589.5 nm (laser 2). This dual wavelengths output exhibits a good performance having the side mode suppression ratio over 52 dB and acceptably high peak power at...
An all-fiber comb filter using a tapered-erbium-doped fiber in a Mach–Zehnder interferometer structure is presented. The free spectral range, extinction ratio, bandwidth, and interference pattern of the comb filter can be shaped by controlling the taper waist length and the length of up and down taper transition regions. By varying the taper waist length from 5 to 25 mm, the free spectral range changes...
The characteristics of tapered-EDF is studied. The loss, transmission and ASE spectrum, gain and noise figure are measured in order to observe the behavior of tapered-EDF. The comb-like spectrum with equal distance of 1.6nm is observed both for the ASE spectrum as well as for the transmission spectrum. This validates that the coupling between fundamental mode and higher order modes occurred in the...
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