Showing papers by "All Saints' College published in 2012"
TL;DR: Single crystals of zinc benzoate with a novel structure were grown in gel media and the sample was found to be thermally stable up to 280°C and the kinetic and thermodynamic parameters were determined.
7 citations
Journal Article•
28 Nov 2012-International Journal of Advanced Research in Computer Science and Electronics Engineering
TL;DR: An efficient spectrometer capable of performing a wide variety of coherent multidimensional measurements at optical wavelengths is developed by wavelength variation approach by which it can measure the bending more accurately in optical waveguide, as compare to recent sensors.
Abstract: Multimode interference in optical waveguides has interesting self-imaging properties, which have extensively been investigated and utilized in many integrated optical devices. Multimode interference has also been explored in optical fibers in order to realize fiber devices, including sensors. A basic structure of these devices has been the Single mode –Multimode – Single mode (SMS) fiber section concatenation. This dissertation describes theoretical and numerical investigations on multimode interference (MMI) devices using a single mode-multimode-single mode (SMS) fiber structure for possible use as bending sensor using wavelength variation technique. Several aspects of the SMS edge filters have been investigated, including the effect of bending the SMS fiber cores due to fabrication tolerances, polarization dependence, and temperature dependence. These aspects can impair the performance of a wavelength measurement system. There are several approaches which have been proposed and demonstrated to achieve high resolution and accuracy of wavelength measurement. Bending effects due to the splicing process on the spectral characteristics of SMS fiber structure are investigated experimentally with the help of MATLAB. A limit for the tolerable of the cores of an SMS fiber structure based sensor is proposed, beyond which the fiber spectral performance degrades unacceptably. We use Wavelength variation approach by which we can measure the bending more accurately in optical waveguide, as compare to recent sensors. Due to the power loss the power transmission is decreases and efficiency also reduces. So by wavelength variation approach we developed an efficient spectrometer capable of performing a wide variety of coherent multidimensional measurements at optical wavelengths. In this approach we fixed the power and calculate the variation in the wavelength to sense the bending accurately. We apply our algorithm for performing several comparison considerations which shows the performance of our algorithm which is better in comparison to the previous work.
1 citations