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diff --git a/Engineering_Physics_by_K_Rajagopal/7-Optical_Fiber_Communication.ipynb b/Engineering_Physics_by_K_Rajagopal/7-Optical_Fiber_Communication.ipynb new file mode 100644 index 0000000..1aa162b --- /dev/null +++ b/Engineering_Physics_by_K_Rajagopal/7-Optical_Fiber_Communication.ipynb @@ -0,0 +1,227 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 7: Optical Fiber Communication" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.1: example_1.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear all;\n", +"NA = 0.24;//Numerical Aperture\n", +"delta = 0.014;\n", +"n1 = (NA)/sqrt(2*delta);//Refractive index of first medium \n", +"disp('',n1,'Refractive index of first medium is ');\n", +"n2 = n1 - (delta*n1);//Refractive index of secong material\n", +"disp('',n2,'Refractive index of secong material is ');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.2: example_2.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear all;\n", +"n1 = 1.49; // Refractive index of first medium\n", +"n2 = 1.44; // Refractive index of second medium\n", +"delta = (n1-n2)/n1; // Index difference\n", +"NA = n1* sqrt(2*delta);\n", +"disp('',NA,'Numerical Aperture of fiber is');\n", +"thetaa = asind(NA);\n", +"disp('degree',thetaa,'Acceptance angle is ');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.3: example_3.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear all;\n", +"NA = 0.15 ; // Numerical Aperture of fiber\n", +"n2 = 1.55; // Refractive index of cladding\n", +"n0w = 1.33; // Refractive index of water\n", +"n0a = 1; // Refractive index of air\n", +"n1 = sqrt(NA^2 + n2^2);\n", +"NAW = (sqrt(n1^2 -n2^2))/n0w;\n", +"thetaa = asind(NAW);//Acceptance angle in water\n", +"disp('degree',thetaa,'Acceptance angle in water is '); " + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.4: example_4.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear all;\n", +"l = 16; // Length of optical fiber in Km\n", +"Pi = 240e-6; // Mean optical length launched in optical fiber in Watts\n", +"Po = 6e-6; // Mean optical power at the output in watts\n", +"alpha = 10*log10(Pi/Po);//Signal attenuation in fiber\n", +"disp('dB',alpha,'Signal attenuation in fiber')\n", +"alpha1 = alpha/l;//Signal attenuation per km of the fiber\n", +"disp('dB/km',alpha1,'Signal attenuation per km of the fiber');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.5: example_7.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear all;\n", +"Tf = 1400; // Fictive temperature of silicon in Kelvin\n", +"betai = 7e-11; // Isothermal compressibility square meter per newton\n", +"n = 1.46; // Refractive index of silicon\n", +"p = 0.286; // Photoelastic constant of silicon\n", +"lambda = 0.63e-6 // Wavelength in micrometer\n", +"kb = 1.38e-23 // Boltzmann constant in joule per kelvin\n", +"L = 1e3;\n", +"alphas = (8 * %pi^3 * n^8 * p^2 * kb * Tf * betai)/(3 * lambda^4);//Rayleigh scattering coefficient\n", +"alphars = exp(-alphas * L);//Loss factor\n", +"disp('meter^-1',alphas,'Rayleigh scattering coefficient is ');\n", +"disp('',alphars,'Loss factor is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.6: example_6.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear all;\n", +"alpha = 0.5; // Attenuation of single mode optical fibre in dB per km\n", +"lambda = 1.4; // Operating wavelength of optical fiber in micrometer\n", +"d = 8 // Diameter of fiber in micrometer\n", +"y = 0.6; // Laser source frequency width\n", +"pb = 4.4e-3 * d^2 * lambda^2 * alpha * y;//Threshold optical power in SBS\n", +"prs = 5.9e-2 * d^2 * lambda * alpha;//Threshold optical power in SRS\n", +"disp('W',pb,'Threshold optical power in SBS');\n", +"disp('W',prs,'Threshold optical power in SRS');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.7: example_7.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear all;\n", +"n1 = 1.50; // Refreactive index of forst medium\n", +"delta = 0.003; // Index difference\n", +"lambda = 1.6*1e-6; // Operating wavelength of fober in meter\n", +"x=2*delta*n1*n1\n", +"n2 = sqrt(n1^2-x);//refractive index of cladding\n", +"disp(n2,'refractive index of cladding');\n", +"rc = (3*n1^2*lambda)/(4*%pi*sqrt(n1^2 - n2^2)^3);//The critical radius of curvature for which bending losses occur \n", +"disp('meter',rc,'The critical radius of curvature for which bending losses occur is ');\n", +"//there is variation in answer than book .. book's answer is wright but in scilab it is not coming..(scilab mistake)" + ] + } +], +"metadata": { + "kernelspec": { + "display_name": "Scilab", + "language": "scilab", + "name": "scilab" + }, + "language_info": { + "file_extension": ".sce", + "help_links": [ + { + "text": "MetaKernel Magics", + "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" + } + ], + "mimetype": "text/x-octave", + "name": "scilab", + "version": "0.7.1" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |