Informatics Publishing Limited

Manish Saxena ¹, Anubhuti Khare ²

Affiliations
1 EC Department, BIST, Bhopal, IN
2 Department of Electronics and Communication, University Institute of Technology, Rajeev Gandhi Technical University, Bhopal, IN

Abstract

This paper deals with mathematical modeling, design and application of Fiber Bragg Grating as temperature sensor .In this paper we used the MATLAB and filter characteristics simulation software as a tool for simulation results. The fabrication of Fiber Bragg Grating, their characteristics and fundamental properties are described. The reflectivity of FBG is described using simulation results. This paper also presents the simulation results of FBG as temperature and gas sensor. From the plotting analysis it can be concluded that for reduce the width of reflection spectrum we can take long grating.

Keywords

Fiber Bragg Grating, Grating Sensor, WDM, MATLAB, Strain, Temperature, Runge Kutta Algorithm.

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Arup Roy Chowdhury ¹, Manish Saxena ¹, Ankush Kumar ¹, S. R. Joshi ¹, Amitabh ¹, Aditya Dagar ¹, Manish Mittal ¹, Shweta Kirkire ¹, Jalshri Desai ¹, Dhrupesh Shah ¹, J. C. Karelia ¹, Anand Kumar ¹, Kailash Jha ¹, Prasanta Das ¹, H. V. Bhagat ¹, Jitendra Sharma ¹, D. N. Ghonia ¹, Meghal Desai ¹, Gaurav Bansal ¹, Ashutosh Gupta ¹

Affiliations
1 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN

Abstract

Orbiter High Resolution Camera (OHRC) onboard Chandrayaan-2 Orbiter-craft, is a very high spatial resolution camera operating in visible panchromatic band. OHRC’s primary goal is to image the landingsite region prior to landing for characterization and finding hazard-free zones. Post landing operation of the OHRC will be for scientific studies of small-scale features on the lunar surface. OHRC makes use of the time delay integration detector to have good signal-tonoise ratio under low illumination condition and less integration time due to very high spatial resolution. Ground sampling distance (GSD) and swath of OHRC (in nadir view) are 0.25 m and 3 km respectively, from 100 km altitude. GSD is better than 0.32 m in oblique view (25° pitch angle) during landing site imaging from 100 km altitude in two stereo views in consecutive orbits. This article includes the details of the configuration, sub-systems, imaging modes, and optical, spectral and radiometric characterization performance.

Keywords

Ground Sampling Distance, Orbiter High Resolution Camera, Relative Spectral Response, Square Wave Response, Time Delay Integration.

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