{ "metadata": { "name": "", "signature": "sha256:161f2af28057c1d070e2d9170a764b41538f5b5faa1a2af8f60c6674471beb1e" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Chapter 2: Optical fibers: Structures, Waveguiding, and Fabrication" ] }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 2.1, Page Number: 37" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "\n", "#variable declaration\n", "n1 = 1.48 #core refractive index for glass n1\n", "n2 = 1.00 #core refractive index for air n2\n", "\n", "#calculation\n", "phic = math.asin(n2/n1) #Interflaction reflaction angle(degree)\n", "\n", "#result\n", "print \"Total Interflaction reflaction angle = \",round(phic*57.3,1),\"degree\"" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Total Interflaction reflaction angle = 42.5 degree\n" ] } ], "prompt_number": 10 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 2.2, Page Number: 45" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "\n", "#variable declaration\n", "n1=1.48 #core refractive index\n", "n2=1.46 #cladding refractive index\n", "\n", "#calculation\n", "phiC=math.degrees(math.asin(n2/n1)) #critical angle (degree)\n", "NA=math.sqrt((n1*n1)-(n2*n2)) #numerical apperture\n", "phiO=math.degrees(math.asin(NA)) #maximum entrance angle (degree)\n", "\n", "#result\n", "print \"Critical angle =\" ,round(phiC,1),\"degree\"\n", "print \"Numerical apperture =\" ,round(NA,3)\n", "print \"Acceptance angle =\" ,int(phiO),\"degree\"\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Critical angle = 80.6 degree\n", "Numerical apperture = 0.242\n", "Acceptance angle = 14 degree\n" ] } ], "prompt_number": 11 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 2.3 , Page Number: 58" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "\n", "#variable declaration\n", "V=26.6 #normalized frequency\n", "lamda=1300*1e-9 #wavelength(nm)\n", "a=25*1e-6 #core radius(um)\n", "\n", "\n", "#caculation\n", "NA=(V*lamda)/(2*math.pi*a) #numerical aperture\n", "\n", "#result\n", "print \"Numerical aperture =\",round(NA,2)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Numerical aperture = 0.22\n" ] } ], "prompt_number": 12 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 2.4 , Page Number: 62" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math \n", " \n", "#variable declaration\n", "V2 = 22 #normalized frequency2\n", "V1=39 #normalized frequency1\n", "p=1.4 \n", "\n", "#calculation\n", "M1=(V1**2)/2 #modes in fiber1\n", "M2=V2**2/2 #modes in fiber2\n", "Pcladd_P1 = (4/3)*(M1**(-0.5))*p\n", "Pcore_P1= 1-Pcladd_P1\n", "Pcladd_P2 = (4/3)*(M2**(-0.5))*p\n", "Pcore_P2= 1-Pcladd_P2 \n", "\n", "#result\n", "print 'case1 : Total number of modes',M1\n", "print 'case1 : Percent age of power propagates in the cladding',int(Pcladd_P1 *100)\n", "print 'case2 : Total number of modes',M2\n", "print 'case2 : Percent age of power propagates in the cladding',int(round(Pcladd_P2 *100,0)) " ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "case1 : Total number of modes 760\n", "case1 : Percent age of power propagates in the cladding 5\n", "case2 : Total number of modes 242\n", "case2 : Percent age of power propagates in the cladding 9\n" ] } ], "prompt_number": 13 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 2.5 , Page Number: 65" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", " \n", "#variable declaration\n", "lamda=1300*1e-9 #wavelength(nm)\n", "Lp=8*1e-2 #beat length(cm)\n", "\n", "#calculation\n", "Bf=lamda/Lp #modal birefringence\n", "bita=(2*math.pi)/Lp #birefringence(1/m)\n", "\n", "#result\n", "print \"Modal birefringence =\",round(Bf,7)\n", "print \"Birefringence Bita =\",bita,\"1/m\" " ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Modal birefringence = 1.62e-05\n", "Birefringence Bita = 78.5398163397 1/m\n" ] } ], "prompt_number": 15 } ], "metadata": {} } ] }