1
Q
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2
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3
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4
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optical power
5
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6
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7
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8
Q
How low is the optical fibre attenuation?
Typical singlemode fibres halve the signal power every ___km
Typical ADSL copper wire lines halve the signal power every 250m at 1MHz carrier frequency.
A
9
Q
A
10
Q
what is the definition of poroelasticity
A
11
Q
what’s the difference between temperature accuracy and resolution
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12
Q
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13
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14
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15
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16
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17
Q
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18
Q
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19
Q
what are the 2 types of refractive index profiles
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20
Q
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21
Q
Light is confined inside the optical fibre thanks to _______
A
22
Q
Knowing the s______ one can map the temperature distribution to the fibre distance
A
23
Q
what is modal dispersion
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24
Q
A
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28
what are the most common materials used in fiber optics
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what is pulse width
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•The temperature resolution degrades _____ over distance. This is caused by the \_\_\_\_\_\_\_\_\_.
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50
what is the equation of NA
51
describe the refractive index profile for single mode and multimode fibers
52
53
54
what is IOR
optical index of refraction
55
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57
What is "V number"
58
59
what are the advantages of using graded-index fiber versus single-index fiber
60
61
what is Modal birefringence
62
63
what are the advantages to multimode fiber
64
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67
what is a multiplexer
68
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what is the effective index
73
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what is attenuation
79
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what is phase velocity
86
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what are the 3 types of backscattered photons
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96
what is Group birefringence
97
what is group velocity
98
99
Stokes and anti-Stokes signals experience _____ losses.
100
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113
what are fiber modes
114
what is Δα.
115
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117
what is chromatic dispersion
118
119
•Loss occurs because a small portion of forward propagating light is\_\_\_\_\_\_\_\_\_
120
what is FIMT
fiber in metal tube
121
what is cutoff
122
123
The underlying principle of the ULTIMA DTS is ____ and \_\_\_\_\_
124
•The intensity of the _____ band is temperature sensitive.
125
126
how does the OTDR work
| (optical time domain reflectometer)
127
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131
What is NA?
132
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140
what is mode area
141
what is an OTDR
optical time domain reflectometer
142
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149
what is a walkaway VSP
150
what is an offset VSP
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167
what does RAID stand for
168
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170
what is an LAS file
171
what is an SFP
172
1. An APC reduces the risk of \_\_\_\_\_\_\_\_
1. An APC reduces the risk of direct light reflection
173
how can you tell the differencet between the FC/PC and E2000 connectors
174
