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diff --git a/Optical_fiber_communication_by_gerd_keiser/chapter2_1.ipynb b/Optical_fiber_communication_by_gerd_keiser/chapter2_1.ipynb new file mode 100755 index 00000000..5cd59824 --- /dev/null +++ b/Optical_fiber_communication_by_gerd_keiser/chapter2_1.ipynb @@ -0,0 +1,231 @@ +{
+ "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": {}
+ }
+ ]
+}
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