diff options
Diffstat (limited to 'Engineering_Physics/Chapter13.ipynb')
| -rwxr-xr-x | Engineering_Physics/Chapter13.ipynb | 386 |
1 files changed, 0 insertions, 386 deletions
diff --git a/Engineering_Physics/Chapter13.ipynb b/Engineering_Physics/Chapter13.ipynb deleted file mode 100755 index 83323d13..00000000 --- a/Engineering_Physics/Chapter13.ipynb +++ /dev/null @@ -1,386 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:46a82c7fe1b65af7ee26b9fa38521b26c61cee31bc75dd5001fe45442416739c"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "13: Optical Fibre"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.1, Page number 250"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "n1=1.49; #refractive index of core\n",
- "n2=1.46; #refractive index of cladding\n",
- "\n",
- "#Calculation \n",
- "NA=math.sqrt((n1**2)-(n2**2)); #Numerical aperture\n",
- "\n",
- "#Result\n",
- "print \"The numerical aperture is\",round(NA,1)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The numerical aperture is 0.3\n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.2, Page number 250"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "NA=0.5; #numerical aperture of fibre \n",
- "n0=1; #refractive index of the medium(air)\n",
- "\n",
- "#Calculation \n",
- "i=math.asin(NA/n0); #acceptance angle(radian)\n",
- "i=i*180/math.pi; #angle(degrees)\n",
- "\n",
- "#Result\n",
- "print \"The acceptance angle is\",i,\"degrees\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The acceptance angle is 30.0 degrees\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.3, Page number 250"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "NA=0.25; #numerical apperture\n",
- "lamda=0.75; #wavelength(micro m)\n",
- "a=25; #core radius(micro m)\n",
- "\n",
- "#Calculation \n",
- "f=(2*math.pi*a*NA)/lamda; #normalised frequency\n",
- "Ng=(f**2)/2; #number of guided modes\n",
- "\n",
- "#Result\n",
- "print \"The number of guided modes is\",int(Ng)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The number of guided modes is 1370\n"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.4, Page number 250"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "pi=100; #mean optical power launched(micro m)\n",
- "po=5; #mean optical power at fibre output(micro W)\n",
- "l=6; #length(km)\n",
- "\n",
- "#Calculation \n",
- "S=10*math.log10(pi/po); #signal attenuation(dB)\n",
- "Sk=S/l; #signal attenuation(dB/km)\n",
- "\n",
- "#Result\n",
- "print \"The signal attenuation is\",round(Sk,3),\"dB/km\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The signal attenuation is 2.168 dB/km\n"
- ]
- }
- ],
- "prompt_number": 8
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.5, Page number 250"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "ns=2.89; #sum of refractive indices of core & cladding\n",
- "nd=0.03; #difference of refractive indices of core & cladding\n",
- "\n",
- "#Calculation \n",
- "NA=math.sqrt(ns*nd); #numerical apperture\n",
- "\n",
- "#Result\n",
- "print \"The numerical apperture for the optical fibre is\",round(NA,2)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The numerical apperture for the optical fibre is 0.29\n"
- ]
- }
- ],
- "prompt_number": 10
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.6, Page number 250"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "NA=0.28; #numerical aperture\n",
- "a=30; #core radius(micro m)\n",
- "lamda=0.8; #wavelength(micro m)\n",
- "\n",
- "#Calculation \n",
- "f=(2*math.pi*a*NA)/lamda; #normalised frequency\n",
- "Ng=f**2/2; #number of guided modes\n",
- "\n",
- "#Result\n",
- "print \"The number of guided modes is\",int(Ng)\n",
- "print \"answer in the book varies due to rounding off errors\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The number of guided modes is 2176\n",
- "answer in the book varies due to rounding off errors\n"
- ]
- }
- ],
- "prompt_number": 14
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.7, Page number 250"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "S=2; #signal attenuation(dB/km)\n",
- "l=1; #length(km)\n",
- "p0=20; #mean optical power at fibre output(micro W)\n",
- "\n",
- "#Calculation \n",
- "pi=p0*10**(S/10); #mean optical power launched into fibre(micro W)\n",
- "\n",
- "#Result\n",
- "print \"The mean optical power launched into a fibre is\",round(pi,1),\"micro W\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The mean optical power launched into a fibre is 31.7 micro W\n"
- ]
- }
- ],
- "prompt_number": 16
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.8, Page number 251"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "S=2.3; #Signal attenuation(dB/km)\n",
- "l=4; #length(km)\n",
- "\n",
- "#Calculation \n",
- "S=S*l; #signal attenuation for 4km in dB\n",
- "P=10**(S/10); #ratio of mean optical power\n",
- "\n",
- "#Result\n",
- "print \"ratio of mean optical power is\",round(P,1)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "ratio of mean optical power is 8.3\n"
- ]
- }
- ],
- "prompt_number": 18
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.9, Page number 251"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "op=1/4; #ratio\n",
- "\n",
- "#Calculation \n",
- "#S=10*log(pi/po)\n",
- "S=10*math.log10(1/op); #signal attenuation(dB)\n",
- "\n",
- "#Result\n",
- "print \"Signal attenuation is\",int(S),\"dB\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Signal attenuation is 6 dB\n"
- ]
- }
- ],
- "prompt_number": 20
- }
- ],
- "metadata": {}
- }
- ]
-}
\ No newline at end of file |