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diff --git a/Fiber_Optics_and_Optoelectronics_by_R._P._Khare/Chapter7.ipynb b/Fiber_Optics_and_Optoelectronics_by_R._P._Khare/Chapter7.ipynb new file mode 100644 index 00000000..a97cee35 --- /dev/null +++ b/Fiber_Optics_and_Optoelectronics_by_R._P._Khare/Chapter7.ipynb @@ -0,0 +1,334 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter7 - Optoelectronic sources" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.1: Page 153" + ] + }, + { + "cell_type": "code", + "execution_count": 1, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Intrinsic carrier concentration ,ni = 2.2e+12 m**-3\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt, pi, exp\n", + "#Intrinsic carrier\n", + "#given data :\n", + "m=9.11*10**-31## in kg\n", + "k=1.38*10**-23## in JK**-1\n", + "h=6.626*10**-34## in Js\n", + "ev=1.6*10**-19## in J\n", + "T=300## in K\n", + "me=0.07*m## in kg\n", + "mh=0.56*m## in kg\n", + "Eg=1.43*ev## in J\n", + "ni=2*((2*pi*k*T)/h**2)**(3/2)*(me*mh)**(3/4)*exp(-Eg/(2*k*T))#\n", + "print \"Intrinsic carrier concentration ,ni = %0.1e m**-3\"%ni" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.2: Page 155" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Diffusion potential, Vd = 1.234 V\n" + ] + } + ], + "source": [ + "#Diffusion potential\n", + "from math import log\n", + "#given data :\n", + "Na=5*10**23## in m**-3\n", + "Nd=5*10**21## in m**-3\n", + "T=300## in K\n", + "e=1.6*10**-19## in J\n", + "k=1.38*10**-23## in JK**-1\n", + "V=(k*T)/e#\n", + "ni=2.2*10**12## in m**-3\n", + "Vd=V*log((Na*Nd)/ni**2)#\n", + "print \"Diffusion potential, Vd = %0.3f V\"%Vd" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.3: Page 161" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Injection efficiency, eta_inj = 0.8247\n" + ] + } + ], + "source": [ + "#Injection efficiency\n", + "#given data :\n", + "Na=10**23## in m**-3\n", + "Nd=10**21## in m**-3\n", + "T=300## in K\n", + "e=1.6*10**-19## in J\n", + "k=1.38*10**-23## in JK**-1\n", + "mue=0.85## in m**2V**-1s**-1\n", + "muh=0.04## in m**2V**-1s**-1\n", + "De=(mue*k*T)/e## in m**2s**-1\n", + "Dh=(muh*k*T)/e## in m**2s**-1\n", + "Le=1#\n", + "Lh=Le#\n", + "eta_inj=1/(1+((De/Dh)*(Lh/Le)*(Nd/Na)))#\n", + "print \"Injection efficiency, eta_inj = %0.4f\"%eta_inj" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.4: Page 171" + ] + }, + { + "cell_type": "code", + "execution_count": 4, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "part (a)\n", + "Internal quantum efficiency = 0.50\n", + "part (b)\n", + "External quantum efficiency = 0.0337\n" + ] + } + ], + "source": [ + "#Internal and quantum efficiency\n", + "#given data :\n", + "print \"part (a)\"\n", + "tau_rr=1#\n", + "tau_nr=tau_rr#\n", + "eta_int=1/(1+(tau_rr/tau_nr))#\n", + "print \"Internal quantum efficiency = %0.2f\"%eta_int\n", + "print \"part (b)\"\n", + "ns=3.7#\n", + "na=1.5#\n", + "As=0#\n", + "eta_ext=eta_int*(1-As)*((2*na**3)/(ns*(ns+na)**2))#\n", + "print \"External quantum efficiency = %0.4f\"%eta_ext" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.5: Page 180" + ] + }, + { + "cell_type": "code", + "execution_count": 5, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The number of longitudinal modes excited = 1.001e-03 nm\n" + ] + } + ], + "source": [ + "#The number of longitudinal modes excited\n", + "#given data :\n", + "lamda=632.8*10**-9## in m\n", + "n=1#\n", + "L=20*10**-2## in m\n", + "del_lamda=((lamda)**2/(2*n*L))*10**9#\n", + "print \"The number of longitudinal modes excited = %0.3e nm\"%del_lamda" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.6: Page 183" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "part (a)\n", + "The reduction in threshold gain = 1.31 mm**-1\n", + "part (b)\n", + "Differential quantum efficiency = 0.42\n" + ] + } + ], + "source": [ + "#The reduction and Differential quantum efficiency\n", + "#given data :\n", + "print \"part (a)\"\n", + "alfa_eff=1.5## in mm**-1\n", + "gama=0.8#\n", + "L=0.5## in mm\n", + "R1=0.35#\n", + "R2=R1#\n", + "R2a=1.0#\n", + "g_th1=(1/gama)*(alfa_eff+(1/(2*L))*log(1/(R1*R2)))#\n", + "g_th2=(1/gama)*(alfa_eff+(1/(2*L))*log(1/(R1*R2a)))#\n", + "del_gth=g_th1-g_th2#\n", + "print \"The reduction in threshold gain = %0.2f mm**-1\"%del_gth\n", + "print \"part (b)\"\n", + "eta_D=(gama*(g_th2-alfa_eff))/(g_th2)#\n", + "print \"Differential quantum efficiency = %0.2f\"%eta_D" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.7: Page 192" + ] + }, + { + "cell_type": "code", + "execution_count": 7, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "part (a)\n", + "The internal power efficiency = 0.48\n", + "part (b)\n", + "The external power efficiency = 0.012\n", + "part (c)\n", + "The overall source fiber power coupling efficiency = 8.51e-04\n", + "The optical loss = 30.70 dB\n" + ] + } + ], + "source": [ + "from math import log10\n", + "#Internal and external power efficiency\n", + "#given data :\n", + "print \"part (a)\"\n", + "As=0##\n", + "ns=3.7## assuming that the example 7.4\n", + "eta_int=0.50## internal efficiency\n", + "V=1.5## in V\n", + "I=120*10**-3## in A\n", + "IBYe=120*10**-3## \n", + "Eph=1.43## in eV\n", + "eta_int=0.50## internal efficiency\n", + "fi_int=eta_int*IBYe*Eph#\n", + "t_power=I*V#\n", + "P_int=fi_int/t_power#\n", + "print \"The internal power efficiency = %0.2f\"%P_int\n", + "print \"part (b)\"\n", + "eta_ext=eta_int*(1-As)*2/(ns*(ns+1)**2)#\n", + "fi_ext=eta_ext*IBYe*Eph#\n", + "t_power=I*V#\n", + "P_ext=fi_ext/t_power#\n", + "print \"The external power efficiency = %0.3f\"%P_ext\n", + "print \"part (c)\"\n", + "V=1.5## in V\n", + "I=120*10**-3## in A\n", + "IBYe=120*10**-3## \n", + "Eph=1.43## in eV\n", + "n1=1.5#\n", + "n2=1.48#\n", + "na=n1#\n", + "eta_ext=0.0337#\n", + "eta_T=eta_ext*((n1**2-n2**2)/na**2)#\n", + "fi_T=eta_T*IBYe*Eph#\n", + "t_power=I*V#\n", + "sfpc=fi_T/t_power#\n", + "O_loss=-10*log10(sfpc)#\n", + "print \"The overall source fiber power coupling efficiency = %0.2e\"%sfpc\n", + "print \"The optical loss = %0.2f dB\"%O_loss" + ] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 2", + "language": "python", + "name": "python2" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 2 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython2", + "version": "2.7.9" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |