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{
"metadata": {
"celltoolbar": "Raw Cell Format",
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 4: Optical Detectors"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.1,Page number 99"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#given\n",
"\n",
"Tn=5; #in micrometer\n",
"Vs=10**7; #in m/s\n",
"tr=Tn*10**-6/Vs;\n",
"print\"Response time\",tr/10**-12,\"ps\";\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Response time 0.5 ps\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.2,Page number 106"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#given\n",
"\n",
"\n",
"Pd=1.15; #in mW\n",
"\n",
"TA=25; #in deg C\n",
"theta_JA=200; #in C/W for hermetric led\n",
"TJ=TA+theta_JA*Pd/10**3;\n",
"TF=8.01*10**12 *math.e**-(8111/(TJ+273));\n",
"print\"Value of TJ is\" ,round(TJ,4), \"deg C\";\n",
"print\"Value of TF is\" ,round(TF,4), \"deg C\";\n",
"\n",
"BF=1.1*10**-3; #from table\n",
"QF=0.5; #from table\n",
"EF=1; #from table\n",
"RF=BF*TF*EF*QF*1/10**6;\n",
"print\"Value of RF\",\"{0:.3e}\".format(RF);\n",
"print\"Value of MTBF is \",\"{0:.3e}\".format(1/RF),\"hours\";"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Value of TJ is 25.23 deg C\n",
"Value of TF is 12.3614 deg C\n",
"Value of RF 6.799e-09\n",
"Value of MTBF is 1.471e+08 hours\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.3,Page number 114"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"#given\n",
"\n",
"R1=0.7;\n",
"R2=0.99;\n",
"ad=0.1;\n",
"\n",
"Ld=1-R1*R2*math.e**-(2*ad);\n",
"print\"Decay Loss \",round(Ld,4);\n",
"trt=40; #fs\n",
"tph=trt/Ld;\n",
"print\"Photon lifetime \",round(tph,4),\"fs\";\n",
"BW=1/tph;\n",
"print\"Bandwidth\",round(BW*1000,4) ,\"Thz\"; #Answer in Thz \n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Decay Loss 0.4326\n",
"Photon lifetime 92.46 fs\n",
"Bandwidth 10.8155 Thz\n"
]
}
],
"prompt_number": 13
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
|
