For the multi-D-shaped fiber with five D-shaped zones, the average power loss measured for four samples was 0.92 �� 0.31 dB (dB loss = 10 �� logP2/P1, P1 = input power, P2 = output power) It can be seen that multi-D-shaped optical fiber produces about 22 �� 4% transmission power loss while keeping enough transmission power for further testing.Figure 5.Experimental setup for monitoring sellectchem the transmission Inhibitors,Modulators,Libraries power loss of multi-D-shaped optical fibers during fabrication process.The tensile tests of the fibers after manufacturing were performed. Tensile testing is a standard procedure for determining the mechanical properties of materials. Inhibitors,Modulators,Libraries A standard tension test machine is shown in Figure 6. The multi-D-shaped optical fiber was placed and fixed in the grips of the testing machine.
The grips were driven by stepping the motor (the minimum displacement is 1 ��m) as well as the screw, hence the load applied by the machine was axial. The testing machine elongated the multi-D-shaped optical fiber at constant rate until the grooved optical fiber ruptured. During the test, continuous readings of the applied load Inhibitors,Modulators,Libraries and the elongation of the multi-D-shaped optical fiber were taken. The load-elongation curve diagrams for the optical fibers could be obtained to measure their mechanical strengths.Figure 6.Schematic diagram of the tensile test machine.Figure 7 depicts the load-elongation curve diagrams for a bare fiber and five different D-shaped fibers. The symbols representing the experimental data and linear least square fitting of these data are also plotted.
Fitting curves (straight line Inhibitors,Modulators,Libraries type) for five different D-shaped fibers are close to that of the bare fiber without any processing. However, the multi-D-shaped optical fiber ruptured when its elongation was beyond 250 ��m, which was only two-three of that for a bare fiber. The force constant of a bare fiber was determined to be 5,956 N/m, while for those of multi-D-shaped fibers force constants were determined to be from 1,089 N/m to 2,256 N/m. It is shown that multi-D-shaped fibers have sufficient mechanical stre
Nowadays optical fiber sensors have been widely applied in many areas of science and technology. These sensors are able to probe a variety of measurands Batimastat and, therefore, can be used in many different sectors, such as industrial, military, aerospace, chemistry, petrochemical, telecommunication and medicine, for different applications [1�C6].
Fiber Bragg grating (FBG) sensors have been exploited as intrinsic optical fiber sensors to measure strain with superior characteristics such as relatively small size, high sensitivity, inertness to electric or magnetic interference, punctual or quasi-distributed measurement ability associated with the wavelength multiplexing capability, www.selleckchem.com/products/Cisplatin.html and electrical passivity at the measurement point [7].