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diff --git a/Optical_Fiber_Communication/Chapter4.ipynb b/Optical_Fiber_Communication/Chapter4.ipynb deleted file mode 100755 index 5cb4e7c2..00000000 --- a/Optical_Fiber_Communication/Chapter4.ipynb +++ /dev/null @@ -1,887 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:7b1c137849cf93f7c696bb48d79752abb9cdb5dcbbc9af1acedb41baab1b64d4"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Chapter 4: Transmission Characteristics of Optical Fibers"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 1: PgNo-138"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "Pi=100*math.pow(10,-6) # mean optical power in watt\n",
- "Po=2*math.pow(10,-6) # output mean power in watt\n",
- "L=6 # length in km\n",
- "L1=8 # length in km\n",
- "asp=10*math.log(Pi/Po)/math.log(10) # signal attenuation in dB\n",
- "as1=asp/L # signal attenuation per km\n",
- "Li=as1*L1 # Loss incurred along 8 km\n",
- "Ls=7 # Loss due to splice in dB\n",
- "as2=Li+Ls #overall signal attenuation in dB\n",
- "As2=29.4 #aprox. overall signal attenuation in dB\n",
- "Pio=math.pow(10,(As2/10)) #i/p o/p power ratio\n",
- "\n",
- "#Results\n",
- "print ('%s %.2f %s' %(\" The signal attenuation = \",asp,\"dB\"))\n",
- "print ('%s %.2f %s' %(\"\\n The signal attenuation per km = \",as1,\"dB/km\"))\n",
- "print ('%s %.2f %s' %(\"\\n The trgth = \",Li,\"km\"))\n",
- "print ('%s %.2f %s' %(\"\\n The overall signal attenuation = \",as2,\"dB\"))\n",
- "print ('%s %.2f' %(\"\\n The i/p o/p power ratio = \", Pio))\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The signal attenuation = 16.99 dB\n",
- "\n",
- " The signal attenuation per km = 2.83 dB/km\n",
- "\n",
- " The trgth = 22.65 km\n",
- "\n",
- " The overall signal attenuation = 29.65 dB\n",
- "\n",
- " The i/p o/p power ratio = 870.96\n"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 2: PgNo-142"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "Pi=1.5*math.pow(10,-3) # mean optical power in watt\n",
- "Po=2*math.pow(10,-6) # output mean power in watt\n",
- "a=0.5 # dB/km\n",
- "L=(10*math.log(Pi/Po)/math.log(10))/a # max possible link Length in km\n",
- "\n",
- "print ('%s %.3f %s' %(\" The max possible link Length = \",L,\"km\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The max possible link Length = 57.501 km\n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3: PgNo-147"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable Declaration\n",
- "n=1.46 # core refractive index\n",
- "p=0.286 # photoelastic coeff\n",
- "b=7*math.pow(10,-11) # isothermal compressibility\n",
- "k=1.381*math.pow(10,-23) # boltzmann's constant\n",
- "tf=1400 # fictive temperature in k\n",
- "y1=0.85*math.pow(10,-6) # wavelength in m\n",
- "\n",
- "# Calculations\n",
- "yr=((8*math.pow(math.pi,3)*math.pow(n,8)*math.pow(p,2)*(b*k*tf)))/(3*math.pow(y1,4))\n",
- "akm=pow(math.e,(-yr*math.pow(10,3)))\n",
- "at=10*math.log(1/akm)/math.log(10)# attenuation at y=0.85 um\n",
- "y2=1.55*math.pow(10,-6) # wavelength in m\n",
- "yr1=((8*math.pow(math.pi,3)*math.pow(n,8)*math.pow(p,2)*(b*k*tf)))/(3*math.pow(y2,4))\n",
- "akm1=math.pow(math.e,(-yr1*math.pow(10,3)))\n",
- "at1=10*math.log(1/akm1)/math.log(10)# attenuation at y=1.55 um\n",
- "y3=1.30*math.pow(10,-6) # wavelength in m\n",
- "yr2=((8*math.pow(math.pi,3)*math.pow(n,8)*math.pow(p,2)*(b*k*tf)))/(3*math.pow(y3,4))\n",
- "akm2=math.pow(math.e,(-yr2*math.pow(10,3)))\n",
- "at2=10*math.log(1/akm2)/math.log(10)# attenuation at y=1.30 um\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The Loss of an optical fiber = \",at,\"dB/km\"))\n",
- "print ('%s %.2f %s' %(\"\\n The Loss of an optical fiber = \",at1,\"dB/km\"))\n",
- "print ('%s %.2f %s' %(\"\\n The Loss of an optical fiber = \",at2,\"dB/km\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The Loss of an optical fiber = 1.57 dB/km\n",
- "\n",
- " The Loss of an optical fiber = 0.14 dB/km\n",
- "\n",
- " The Loss of an optical fiber = 0.29 dB/km\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 4: PgNo-149"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable declaration\n",
- "d=6 # core diameter in m\n",
- "y=1.55 # wavelength in m\n",
- "a=0.5 # attenuation in dB/km\n",
- "v=0.4\n",
- "Pb=4.4*math.pow(10,-3)*math.pow(d,2)*math.pow(y,2)*a*v # threshold power for SBS\n",
- "Pr=5.9*math.pow(10,-2)*math.pow(d,2)*y*a # threshold power for SRS\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The threshold power for SBS = \",Pb*pow(10,3),\"mw\"))\n",
- "print ('%s %.2f %s' %(\"\\n The threshold power for SRS = \",Pr,\"W\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The threshold power for SBS = 76.11 mw\n",
- "\n",
- " The threshold power for SRS = 1.65 W\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5: PgNo-153"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable declaration\n",
- "n1=1.46 # core refractive index\n",
- "dl=0.03 # relative refractive index difference\n",
- "y=0.85*math.pow(10,-6) #operating wavelength in m\n",
- "a=4*math.pow(10,-6) # core radous in m\n",
- "\n",
- "# Calculations\n",
- "n2=math.sqrt(math.pow(n1,2)-2*dl*math.pow(n1,2)) #cladding refractive index\n",
- "Rc=(3*math.pow(n1,2)*y)/(4*math.pi*math.pow((math.pow(n1,2)-math.pow(n2,2)),1.5)) # critical radius of curvature for multimode fiber\n",
- "Dl=0.003 # relative refractive index difference\n",
- "N2=math.sqrt(math.pow(n1,2)-2*Dl*math.pow(n1,2))\n",
- "yc=math.pow(2*math.pi*a*n1*(2*Dl),0.5)/2.405 # cut off wavelength in m\n",
- "y1=1.55*math.pow(10,-6) # operating wavelength in m\n",
- "Rcs=(20*y1*math.pow((2.748-0.996*(y1/yc)),-3))/math.pow((0.005),1.5) # critical radius of curvature for a single mode fiber\n",
- "\n",
- "# Results\n",
- "print '%s %.4f %s' %(\" The critical radius of curvature for multimode fiber = \",Rc*math.pow(10,6),\"um\")\n",
- "print '%s %.4f %s' %(\"\\n The critical radius of curvature for a single mode fiber = \",Rcs*math.pow(10,3),\"um\")\n",
- "print \"\\nThe answer is wrong in the textbook for single mode fiber\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The critical radius of curvature for multimode fiber = 9.4569 um\n",
- "\n",
- " The critical radius of curvature for a single mode fiber = 4.2620 um\n",
- "\n",
- "The answer is wrong in the textbook for single mode fiber\n"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 6: PgNo-157"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# variable declaration\n",
- "x=2.0 # index profile\n",
- "dl=0.0126 #index difference\n",
- "a=(85.0/2.0)*math.pow(10,-6) # core radius\n",
- "R=2.0*math.pow(10,-3) # curve of radius\n",
- "n1=1.45 # core refractive index\n",
- "k=6.28\n",
- "\n",
- "# Calculations\n",
- "y=850.0*math.pow(10,-9) # wavelength in m\n",
- "A=(x+2)/(2*x*dl)\n",
- "B=(2*a/R)\n",
- "C=math.pow((3*y/(2*k*R*n1)),(2.0/3.0))\n",
- "D=B+C\n",
- "E=A*D\n",
- "F=1-E\n",
- "Lm=-10*math.log(-F)/math.log(10) # macrobend loss in dB\n",
- "print ('%s %.2f %s' %(\" The macrobend loss = \",Lm,\"dB\"))\n",
- "print (\"\\n The answer is wrong in the textbook \")"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The macrobend loss = -3.99 dB\n",
- "\n",
- " The answer is wrong in the textbook \n"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 7: PgNO-160"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "Pi=15 # optical power in uw\n",
- "Po=7 # ouput power in uw\n",
- "L=0.15 # length in km\n",
- "Ls=(10*math.log(Pi/Po)/math.log(10))/L # Loss of an optical fiber in dB\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The Loss of an optical fiber = \",Ls,\"dB\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The Loss of an optical fiber = 20.07 dB\n"
- ]
- }
- ],
- "prompt_number": 7
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8: PgNo-163"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "Pi=200*math.pow(10,-6) # average optical power in watt\n",
- "Po=5*math.pow(10,-6) # average output power in watt\n",
- "L=20 # in km\n",
- "L1=12 # in km\n",
- "ns=5 # number of attenuation\n",
- "a=0.9 # attenuation in dB\n",
- "\n",
- "# Calculations\n",
- "sa=10*math.log(Pi/Po)/math.log(10) # signal attenuation\n",
- "sp=sa/L # signal attenuation per km\n",
- "sn=sp*L1 # signal attenuation for 12 km\n",
- "sn1=ns*a # attenuation in dB\n",
- "sn2=sn+sn1 # overall signal attenuation in dB\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The signal attenuation per km = \",sp,\"dB/km\"))\n",
- "print ('%s %.2f %s' %(\"\\n The overall signal attenuation= \",sn2,\"dB \"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The signal attenuation per km = 0.80 dB/km\n",
- "\n",
- " The overall signal attenuation= 14.11 dB \n"
- ]
- }
- ],
- "prompt_number": 8
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 9: PgNo-166"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "Pi=100*math.pow(10,-6) # average optical power in watt\n",
- "Po=4*math.pow(10,-6) # average output power in watt\n",
- "L=6 # in km\n",
- "L1=10 # in km\n",
- "\n",
- "# Calculations\n",
- "sa=10*math.log(Pi/Po)/math.log(10) # signal attenuation\n",
- "sp=sa/L # signal attenuation per km\n",
- "sn=sp*L1 # signal attenuation for 12 km\n",
- "sn1=sn+9 # overall signal attenuation in dB\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The signal attenuation= \",sa,\"dB\"))\n",
- "print ('%s %.2f %s' %(\"\\n The signal attenuation per km = \",sp,\"dB/km\"))\n",
- "print ('%s %.2f %s' %(\"\\n The overall signal attenuation= \",sn1,\"dB\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The signal attenuation= 13.98 dB\n",
- "\n",
- " The signal attenuation per km = 2.33 dB/km\n",
- "\n",
- " The overall signal attenuation= 32.30 dB\n"
- ]
- }
- ],
- "prompt_number": 9
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 10: PgNo-167"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# variable initialisation\n",
- "Pi=20*math.pow(10,-6) #average optical power in watt\n",
- "Po=7.5*math.pow(10,-6) # average output power in watt\n",
- "sl=10*math.log(Pi/Po)/math.log(10) # signal Loss in dB\n",
- "L=15 #in km\n",
- "L1=30 # in km\n",
- "ns=29 # number of attenuation\n",
- "sp=sl/L # signal Loss per km\n",
- "sn=sp*L1 # signal attenuation for 30 km\n",
- "sn1=sn+ns # overall signal attenuation in dB\n",
- "i_o=math.pow(10,(sn1/20)) # input output power ratio\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The signal Loss = \",sl,\"dB\"))\n",
- "print ('%s %.2f %s' %(\"\\n The signal Loss per km= \",sp,\"dB/km\"))\n",
- "print ('%s %.2f %s' %(\"\\n The overall signal attenuation= \",sn1,\"dB\"))\n",
- "print ('%s %.2f' %(\"\\n The input output power ratio= \",i_o))\n",
- "\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The signal Loss = 4.26 dB\n",
- "\n",
- " The signal Loss per km= 0.28 dB/km\n",
- "\n",
- " The overall signal attenuation= 37.52 dB\n",
- "\n",
- " The input output power ratio= 75.16\n"
- ]
- }
- ],
- "prompt_number": 10
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 11: PgNo-171"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "Tf=1400 # temperature in k\n",
- "Bc=7*math.pow(10,-11) # in m^2/N\n",
- "n=1.38\n",
- "P=0.29 # Photoelastic coefficient\n",
- "y=0.9*math.pow(10,-6) # wavelength in m\n",
- "K=1.38*math.pow(10,-23) # boltzman's constant\n",
- "\n",
- "# Calculations\n",
- "Rrs=((8*math.pow(math.pi,3)*math.pow(n,8)*math.pow(P,2)*(Bc*Tf*K))/(3*math.pow(y,4)))\n",
- "Rrs1=Rrs/math.pow(10,-3) # per km\n",
- "Lkm=math.pow(math.e,(-Rrs1)) # transmission loss facter\n",
- "At=10*math.log(1/Lkm)/math.log(10) # Attenuation in dB/km\n",
- "\n",
- "# results\n",
- "print ('%s %.2f %s' %(\" The Attenuation= \",At,\"dB/km\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The Attenuation= 0.82 dB/km\n"
- ]
- }
- ],
- "prompt_number": 11
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 12: PgNo-172"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "y=1.35 # wavelength in um\n",
- "d=5 # core diamater in um\n",
- "a=0.75 # attenuation in dB/km\n",
- "v=0.45 # bandwidth in GHz\n",
- "\n",
- "# calculations\n",
- "Pb=4.4*math.pow(10,-3)*math.pow(d,2)*math.pow(y,2)*(a*v) #threshold optical power for sbs\n",
- "Pr=5.9*math.pow(10,-2)*math.pow(d,2)*(y)*(a) #threshold optical power for sbr\n",
- "Pbr=Pb/Pr # the ratio of threshold power level\n",
- "print ('%s %.2f %s' %(\" The ratio of threshold power level= \",Pbr*100,\"%\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The ratio of threshold power level= 4.53 %\n"
- ]
- }
- ],
- "prompt_number": 12
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 13: PgNo-175"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "n1=1.5 #core refractive index\n",
- "y=0.85*math.pow(10,-6) # wavelength in m\n",
- "dl=0.024 # relative refractive index difference\n",
- "N2=math.sqrt(math.pow(n1,2)-2*dl*math.pow(n1,2)) # cladding refractive index\n",
- "n2=1.46\n",
- "Rcs=(3*math.pow(n1,2)*y)/((4*math.pi)*math.pow((math.pow(n1,2)-math.pow(n2,2)),1.5)) # critical radius of curvature for multimode fiber\n",
- "\n",
- "# Results\n",
- "print ('%s %.3f %s' %(\" The critical radius of curvature = \",Rcs*pow(10,6),\"um\"))\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The critical radius of curvature = 11.207 um\n"
- ]
- }
- ],
- "prompt_number": 13
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 14: PgNo-177"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "n1=1.45 # core refractive index\n",
- "y=1.5*math.pow(10,-6) # wavelength in m\n",
- "dl=0.03 # relative refractive index difference\n",
- "a=5.0*math.pow(10,-6) # core radius\n",
- "n2=math.sqrt(math.pow(n1,2)-2*dl*math.pow(n1,2)) # cladding refractive index\n",
- "yc=(2*math.pi*a*n1*math.sqrt(2*dl))/(2.405)\n",
- "Rcs=(20.0*y*(2.748-0.996*math.pow((y/yc),-3)))/math.pow((math.pow(n1,2)-math.pow(n2,2)),1.5)#critical radius of curvature for single mode fiber\n",
- "Rcs1=(3*math.pow(n1,2)*y)/((4*math.pi)*math.pow(math.pow(n1,2)-math.pow(n2,2),1.5)) # critical radius of curvature for multimode fiber\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The critical radius of curvature for single mode fiber = \",Rcs*pow(10,6),\"um\"))\n",
- "print (\"\\n The answer is wrong in the textbook \")\n",
- "print ('%s %.2f %s' %(\"\\n The critical radius of curvature for multimode fiber = \",Rcs1*pow(10,6),\"um\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The critical radius of curvature for single mode fiber = -17893.87 um\n",
- "\n",
- " The answer is wrong in the textbook \n",
- "\n",
- " The critical radius of curvature for multimode fiber = 16.80 um\n"
- ]
- }
- ],
- "prompt_number": 14
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 15: PgNo-179"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# variable declaration\n",
- "L=500.0/1000.0 # distance in km\n",
- "Pio=(1/(1-0.75))\n",
- "Ls=10*math.log(Pio)/math.log(10)/L # Loss in dB/km\n",
- "\n",
- "# Results\n",
- "print ('%s %.3f %s' %(\" The Loss = \",Ls,\"dB/km\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The Loss = 12.041 dB/km\n"
- ]
- }
- ],
- "prompt_number": 15
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 16: PgNo-181"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "L=5 # length in km\n",
- "a=0.5 # attenuaion loss in dB/km\n",
- "# Calculations\n",
- "Po=math.pow(10,-3)*math.pow(10,(-(a*L)/10)) # power level in mW\n",
- "\n",
- "# Results\n",
- "print ('%s %.3f %s' %(\" The power level = \",Po*pow(10,3),\"mW\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The power level = 0.562 mW\n"
- ]
- }
- ],
- "prompt_number": 16
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 17: PgNo-186"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Variable initialisation\n",
- "L=1 #distance in km\n",
- "Pio=(1/(1-0.40))\n",
- "# Calculations\n",
- "Ls=10*math.log(Pio)/math.log(10)/L # Loss in dB/km\n",
- "\n",
- "# Results\n",
- "print ('%s %.3f %s' %(\" The Loss = \",Ls,\"dB/km\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The Loss = 2.218 dB/km\n"
- ]
- }
- ],
- "prompt_number": 17
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 18: PgNo-188"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# Initialisation of variables\n",
- "Pi=1*math.pow(10,-3) # input power in watt\n",
- "Po=0.75*math.pow(10,-3) # output power in watt\n",
- "a=0.5 #in dB/km\n",
- "L=(10*math.log(Pi/Po)/math.log(10))/a # transmission length in km\n",
- "\n",
- "print ('%s %.1f %s'%(\" The transmission length = \",L,\"km\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The transmission length = 2.5 km\n"
- ]
- }
- ],
- "prompt_number": 18
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 19: PgNo-189"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "# variable initialisation\n",
- "y=1300.0*math.pow(10,-9) # wavelemgth in m\n",
- "yc=1200.0*math.pow(10,-9) # cut off wavelength in m\n",
- "rc=5.0*math.pow(10,-6) #core diameter in m\n",
- "n=1.5 #refractive index\n",
- "R=1.2/100.0 # curve of radius in m\n",
- "\n",
- "# Calculations\n",
- "dmf=2*rc*((0.65)+0.434*math.pow((y/yc),1.5)+0.0149*math.pow((y/yc),6)) # mode field diameter\n",
- "K=(2.0*math.pi)/y\n",
- "Lm=-10*math.log(-1*(1-math.pow(K,4)*math.pow(n,4)*math.pow(((3.95*math.pow(10,-6))/(8*math.pow(R,2))),6)))/math.log(10) # macrobend loss\n",
- "\n",
- "# Results\n",
- "print ('%s %.2f %s' %(\" The mode field diameter = \",dmf*pow(10,6),\"um\"))\n",
- "print ('%s %.2f %s' %(\"\\n The macrobend loss = \",Lm,\"dB\"))\n",
- "print (\"\\n The answer is wrong in the textbook\")\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The mode field diameter = 11.63 um\n",
- "\n",
- " The macrobend loss = -126.52 dB\n",
- "\n",
- " The answer is wrong in the textbook\n"
- ]
- }
- ],
- "prompt_number": 19
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 20: PgNO-191"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#Variable initialisation\n",
- "Pi=10*math.pow(10,-3) # input power in watt\n",
- "Po=8*math.pow(10,-3) # output power in watt\n",
- "L=0.150 # length in km\n",
- "Ls=(10*math.log(Po/Pi)/math.log(10))/L\n",
- "\n",
- "print ('%s %.2f %s' %(\" The transmission length = \",Ls,\"km\"))"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- " The transmission length = -6.46 km\n"
- ]
- }
- ],
- "prompt_number": 20
- }
- ],
- "metadata": {}
- }
- ]
-}
\ No newline at end of file |