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-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# Chapter8 - Optoelectronic detectors"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Example 8.1 : Page 204"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {
-    "collapsed": false,
-    "scrolled": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "part (a)\n",
-      "The photon energy = 1.31 micro-m \n",
-      "part (b)\n",
-      "The optical power = 4.07 micro W \n"
-     ]
-    }
-   ],
-   "source": [
-    "from __future__ import division\n",
-    "#The photon energy and optical power\n",
-    "#given data :\n",
-    "print \"part (a)\"\n",
-    "h=6.626*10**-34## in Js\n",
-    "c=3*10**8## in ms**-1\n",
-    "E=1.52*10**-19## in J\n",
-    "lamda=((h*c)/E)*10**6#\n",
-    "print \"The photon energy = %0.2f micro-m \"%lamda\n",
-    "print \"part (b)\"\n",
-    "e=1.6*10**-19## in J\n",
-    "Ip=3*10**6## in A\n",
-    "E=1.52*10**-19## in J\n",
-    "eta=70/100#\n",
-    "R=(eta*e)/E#\n",
-    "P_in=(Ip/R)*10**-6#\n",
-    "print \"The optical power = %0.2f micro W \"%P_in"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Example 8.2 : Page 205"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 2,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "part (a)\n",
-      "The quantum efficiency, eta = 50.00 %\n",
-      "part (b)\n",
-      "Maximum possible band gap energy,Eg = 1.46 eV \n",
-      "part (c)\n",
-      "The mean output, Ip = 3.42 micro A\n"
-     ]
-    }
-   ],
-   "source": [
-    "#The quantum efficiency,Maximum possible band gap energy and mean output\n",
-    "#given data :\n",
-    "print \"part (a)\"\n",
-    "e=1## electron\n",
-    "p=2## photon\n",
-    "eta=(e/p)*100#\n",
-    "print \"The quantum efficiency, eta = %0.2f %%\"%eta\n",
-    "print \"part (b)\"\n",
-    "h=6.626*10**-34##in Js\n",
-    "c=3*10**8## in m s**-1\n",
-    "lamda_c=0.85*10**-6## in m\n",
-    "Eg=((h*c)/lamda_c)/1.6*10**19#\n",
-    "print \"Maximum possible band gap energy,Eg = %0.2f eV \"%Eg\n",
-    "print \"part (c)\"\n",
-    "e=1## electron\n",
-    "p=2## photon\n",
-    "eta=(e/p)#\n",
-    "e=1.6*10**-19## in J\n",
-    "h=6.626*10**-34##in Js\n",
-    "c=3*10**8## in m s**-1\n",
-    "lamda_c=0.85*10**-6## in m\n",
-    "Eg=((h*c)/lamda_c)#\n",
-    "P_in=10*10**-6## in W\n",
-    "Ip=((eta*e*P_in)/Eg)*10**6#\n",
-    "print \"The mean output, Ip = %0.2f micro A\"%Ip"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Example 8.3 : Page 205"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "part (a)\n",
-      "The quantum efficiency  =  0.4\n",
-      "part (b)\n",
-      "The responsivity of the diode,R = 0.29 AW**-1\n"
-     ]
-    }
-   ],
-   "source": [
-    "#The quantum efficiency and The responsivity of the diode\n",
-    "#given data :\n",
-    "print \"part (a)\"\n",
-    "e=2*10**10## in s**-1\n",
-    "p=5*10**10## in s**-1\n",
-    "eta=e/p#\n",
-    "print \"The quantum efficiency  = \",eta\n",
-    "print \"part (b)\"\n",
-    "e=2*10**10## in s**-1\n",
-    "p=5*10**10## in s**-1\n",
-    "eta=e/p#\n",
-    "e=1.6*10**-19## in J\n",
-    "h=6.626*10**-34##in Js\n",
-    "c=3*10**8## in m s**-1\n",
-    "lamda=0.90*10**-6## in m\n",
-    "R=(eta*e*lamda)/(h*c)#\n",
-    "print \"The responsivity of the diode,R = %0.2f AW**-1\"%R"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Example 8.4 : Page 210"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 4,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "The multiplication factor,M = 47.8\n"
-     ]
-    }
-   ],
-   "source": [
-    "#The multiplication\n",
-    "#given data :\n",
-    "eta=40/100##\n",
-    "e=1.6*10**-19## in J\n",
-    "h=6.626*10**-34##in Js\n",
-    "c=3*10**8## in m s**-1\n",
-    "lamda=1.3*10**-6## in m\n",
-    "P_in=0.3*10**-6## in W\n",
-    "I=6*10**-6## in A\n",
-    "M=(I*h*c)/(P_in*eta*e*lamda)#\n",
-    "print \"The multiplication factor,M = %0.1f\"%M"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Example 8.5 : Page 210"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 5,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Photon incident rate = 1.74e+07 s**-1\n"
-     ]
-    }
-   ],
-   "source": [
-    "#Photon rate\n",
-    "#given data :\n",
-    "e=1.6*10**-19## in J\n",
-    "M=800#\n",
-    "eta=90/100## quantum efficiency\n",
-    "I=2*10**-9## in A\n",
-    "P_rate=I/(e*eta*M)#\n",
-    "print \"Photon incident rate = %0.2e s**-1\"%P_rate"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Example 8.6 : Page 212"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 6,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "part (a)\n",
-      "the gain = 58.95\n",
-      "part (b)\n",
-      "The output photo-current, I = 2.313e-04 A\n"
-     ]
-    }
-   ],
-   "source": [
-    "from math import pi\n",
-    "#Gain and The output photocurrent\n",
-    "#given data :\n",
-    "print \"part (a)\"\n",
-    "tf=6*10**-12## in s\n",
-    "del_f=450*10**6## in Hz\n",
-    "G=1/(2*pi*tf*del_f)#\n",
-    "print \"the gain = %0.2f\"%G\n",
-    "print \"part (b)\"\n",
-    "tf=6*10**-12## in s\n",
-    "del_f=450*10**6## in Hz\n",
-    "G=1/(2*pi*tf*del_f)#\n",
-    "eta=75/100#\n",
-    "P_in=5*10**-6## in W\n",
-    "e=1.6*10**-19## in J\n",
-    "lamda=1.3*10**-6#\n",
-    "h=6.626*10**-34##in Js\n",
-    "c=3*10**8## in m s**-1\n",
-    "I=(G*eta*P_in*e*lamda)/(h*c)#\n",
-    "print \"The output photo-current, I = %0.3e A\"%I"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Example 8.7 : Page 215"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 7,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "part (a)\n",
-      "rms value of shot noise current is = 1.712 nA\n",
-      "rms value of dark current is = 0.20 nA\n",
-      "rms value of thermal noise current is = 20.35 nA \n",
-      "part (b)\n",
-      "S/N ratio = 321\n"
-     ]
-    }
-   ],
-   "source": [
-    "from math import sqrt\n",
-    "#rms value of shot noise ,dark noise and thermal noise current and S/N ratio\n",
-    "print \"part (a)\"\n",
-    "n=0.7##efficiency\n",
-    "e=1.6*10**-19##charge\n",
-    "h=1.3##in micro meter\n",
-    "hc=6.626*10**-34##plack constant\n",
-    "c=3*10**8##m/s\n",
-    "pin=500##nW\n",
-    "Ip=((n*e*h*10**-6*pin*10**-9)/(hc*c))##in amperes\n",
-    "df=25##Mhz\n",
-    "f1=1##\n",
-    "is2=(2*e*Ip*df*10**6*f1)##\n",
-    "Is=sqrt(is2)##in amperes\n",
-    "Id=5*10**-9##amperes\n",
-    "id2=(2*e*Id*df*10**6)##\n",
-    "Id=sqrt(id2)##in amperes\n",
-    "k=1.38*10**-23##\n",
-    "t=300##in kelvin\n",
-    "rl=1000##ohms\n",
-    "it2=((4*k*t*df*10**6)/rl)##\n",
-    "it=sqrt(it2)##in amperes\n",
-    "print \"rms value of shot noise current is = %0.3f nA\"%(Is*10**9)\n",
-    "print \"rms value of dark current is = %0.2f nA\"%(Id*10**9)\n",
-    "print \"rms value of thermal noise current is = %0.2f nA \"%(it*10**9)\n",
-    "print \"part (b)\"\n",
-    "n=0.7##efficiency\n",
-    "e=1.6*10**-19##charge\n",
-    "h=1.3##in micro meter\n",
-    "hc=6.626*10**-34##plack constant\n",
-    "c=3*10**8##m/s\n",
-    "pin=500##nW\n",
-    "Ip=((n*e*h*10**-6*pin*10**-9)/(hc*c))##in amperes\n",
-    "df=25##Mhz\n",
-    "f1=1##\n",
-    "is2=(2*e*Ip*df*10**6*f1)##\n",
-    "Is=sqrt(is2)##in amperes\n",
-    "Id=5*10**-9##amperes\n",
-    "id2=(2*e*Id*df*10**6)##\n",
-    "Id=sqrt(id2)##in amperes\n",
-    "k=1.38*10**-23##\n",
-    "t=300##in kelvin\n",
-    "rl=1000##ohms\n",
-    "it2=((4*k*t*df*10**6)/rl)##\n",
-    "it=sqrt(it2)##in amperes\n",
-    "itt2=is2+id2+it2##in A**2\n",
-    "ip2=Ip**2##\n",
-    "sn=ip2/itt2##\n",
-    "print \"S/N ratio = %d\"%sn\n",
-    "#S/N ratio is calculated wrong in the textbook"
-   ]
-  }
- ],
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-   "display_name": "Python 2",
-   "language": "python",
-   "name": "python2"
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-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 2
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-   "file_extension": ".py",
-   "mimetype": "text/x-python",
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-   "nbconvert_exporter": "python",
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