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{
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{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter9 - Optoelectronics modulators"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 9.1 : Page 227"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The thickness of the a quarter wave plate,x = 0.0164 mm\n"
]
}
],
"source": [
"#The thickness\n",
"#given data :\n",
"lamda=589.3*10**-9## in m\n",
"ne=1.553#J\n",
"no=1.544#\n",
"x=(lamda/(4*(ne-no)))*10**3#\n",
"print \"The thickness of the a quarter wave plate,x = %0.4f mm\"%x"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 9.2 : Page 228"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The thickness of the a quarter wave plate,x = 0.0017 mm\n"
]
}
],
"source": [
"#The thickness\n",
"#given data :\n",
"lamda=589.3*10**-9## in m\n",
"ne=1.486#\n",
"no=1.658#\n",
"x=(lamda/(2*(no-ne)))*10**3#\n",
"print \"The thickness of the a quarter wave plate,x = %0.4f mm\"%x"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 9.3: Page 234"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"change in refrative index = 1.032\n",
"net phase shift = 2.065 \n",
"Vpi = 7.61 kV\n"
]
}
],
"source": [
"from __future__ import division\n",
"from math import pi\n",
"#change in refractive index ,net phase shiftand Vpi\n",
"v=5##kV\n",
"l=1##cm\n",
"ez=(v*10**3)/(l*10**-2)##in V/m\n",
"no=1.51##\n",
"r63=10.5*10**-12##m/V\n",
"dn=((1/2)*no**3*r63*ez)##\n",
"h=550##nm\n",
"dfi=((2*pi*dn*l*10**-2)/(h*10**-9))##\n",
"fi=2*dfi##\n",
"vpi=((h*10**-9)/(2*no**3*r63))*10**-3##kV\n",
"print \"change in refrative index = %0.3f\"%dfi\n",
"print \"net phase shift = %0.3f \"%fi\n",
"print \"Vpi = %0.2f kV\"%vpi\n",
"#refractive index and phase shift is in the form of pi in the textbook"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 9.4: Page 237"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"part (a)\n",
"phase differnce = 1.371e+04\n",
"part (b)\n",
"additional phase differnce = 1.246\n",
"part (c)\n",
"Vpi = 504.25 V\n"
]
}
],
"source": [
"from __future__ import division\n",
"#phase difference,additional phase difference and Vpi\n",
"print \"part (a)\"\n",
"h=550##nm\n",
"l=3##cm\n",
"no=1.51##\n",
"ne=1.47##\n",
"dfi=((2*pi*l*10**-2*(no-ne))/(h*10**-9))##\n",
"print \"phase differnce = %0.3e\"%dfi\n",
"#phase difference is in the form of pi in the textbook\n",
"print \"part (b)\"\n",
"no=1.51##\n",
"r63=26.4*10**-12##m/V\n",
"V=200##\n",
"d=0.25##cm\n",
"dfi=((pi*r63*no**3*(V)*(l*10**-2))/(h*10**-9*d*10**-2))##\n",
"print \"additional phase differnce = %0.3f\"%dfi\n",
"#additional phase difference is in the form of pi in the textbook\n",
"print \"part (c)\"\n",
"r63=26.4*10**-12##m/V\n",
"V=200##\n",
"d=0.25##cm\n",
"dfi=((pi*r63*no**3*(V)*(l*10**-2))/(h*10**-9*d*10**-2))##\n",
"vpi=((h*10**-9)/(no**3*r63))*(d/l)##V\n",
"print \"Vpi = %0.2f V\"%vpi"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 9.5 : Page 239"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"part (a)\n",
"angle = 0.09 degree\n",
"part (b)\n",
"The relative intensity = 0.246\n"
]
}
],
"source": [
"from __future__ import division\n",
"from math import asin,degrees\n",
"#angle and relative intensity\n",
"#given data :\n",
"print \"part (a)\"\n",
"m=1#\n",
"l=633*10**-9## in m\n",
"f=5*10**6## in Hz\n",
"v=1500##in m/s\n",
"n=1.33## for water\n",
"A=v/f#\n",
"theta=asin((l/(n*A)))#\n",
"print \"angle = %0.2f degree\"%degrees(theta)\n",
"print \"part (b)\"\n",
"del_n=10**-5#\n",
"L=1*10**-2## in m\n",
"lamda=633*10**-9## in m\n",
"eta=(pi**2*del_n**2*L**2)/lamda**2#\n",
"print \"The relative intensity = %0.3f\"%eta"
]
}
],
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