basics Flashcards
1
Q
what is an OTDR
A
optical time domain reflectometer
2
Q
A
3
Q
A
4
Q
what is HFM
A
strain hydraulic fracture monitoring
5
Q
A
6
Q
what does iDAS stand for
A
intelligent DAS
7
Q
what is modal dispersion
A
8
Q
how does the OTDR work
(optical time domain reflectometer)
A
9
Q
what is a wireline valve
A
10
Q
A
11
Q
Light is confined inside the optical fibre thanks to _______
A
12
Q
A
13
Q
what is Δα.
A
14
Q
A
15
Q
what is Modal birefringence
A
16
Q
A
17
Q
what is group velocity
A
18
Q
A
19
Q
A
20
Q
what does DAS measure (short version)
A
measures the rate of change of strain in the fiber or strain rate
21
Q
what is chromatic dispersion
A
22
Q
what are the 2 types of refractive index profiles
A
23
Q
A
24
Q
what is the definition of RMS
A
25
what are the advantages of using graded-index fiber versus single-index fiber
26
27
28
29
what is mode area
30
31
32
33
what is the definition of bandwith
34
35
36
37
38
39
40
41
42
43
44
Stokes and anti-Stokes signals experience _____ losses.
45
what is the equation of NA
46
what is a line-wiper
47
48
what is a quick test sub
49
what are the most common materials used in fiber optics
50
51
It is important to note that fiber sensitivity to a p-wave arrival is greatest at angles of incidence near ____ or in the direction parallel to the fiber. Note that for shear waves, the particle motion is perpendicular to the direction of travel of the wave. This means that the sensitivity to shear waves within the fiber is greatest for angles of incidence close to ______ degrees or perpendicular to the stimulation
52
53
what is the temperature resolution of ULTIMA
54
what is the range of ULTIMA
55
56
57
58
59
60
61
what is FIMT
fiber in metal tube
62
63
64
•The temperature resolution degrades _____ over distance. This is caused by the \_\_\_\_\_\_\_\_\_.
65
66
what are 3 advantages and disadvanteges to fiber VSP
67
what does RAID stand for
68
69
70
71
72
73
74
what's the difference between temperature accuracy and resoluiton
75
76
77
78
79
80
what is an offset VSP
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
What is NA?
98
99
100
101
what is a CCL
102
•Loss occurs because a small portion of forward propagating light is\_\_\_\_\_\_\_\_\_
103
what is the nominal ocular hazard distance
104
105
106
107
what is a pump down assembly
108
109
what is a walkaway VSP
110
111
describe the refractive index profile for single mode and multimode fibers
112
113
what is a wireline pressure control flange
114
what is pulse width
115
116
117
118
what is a pump-in sub
119
120
121
122
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.
123
what is IOR
optical index of refraction
124
125
126
127
what are the 3 types of backscattered photons
128
129
130
131
132
133
What is "V number"
134
135
what is a quick connect sub
136
optical power
137
138
describe bedding plane slip
139
140
what is the effective index
141
what is the definition of poroelasticity
142
143
144
what are the advantages to multimode fiber
145
146
147
what is a cable head
148
149
what is a TEC cable
tubing Encapsulated cable
150
what are fiber modes
151
what is cutoff
152
153
what is a grease injector head
154
155
156
157
158
159
1. An APC reduces the risk of \_\_\_\_\_\_\_\_
1. An APC reduces the risk of direct light reflection
160
how is fiber das limited compared to a geophone
161
162
163
how can you tell the differencet between the FC/PC and E2000 connectors
164
what is phase velocity
165
166
what is an LAS file
167
168
what is a multiplexer
169
170
what are the 2 advantages of fiber das VSP over geophone VSP
171
172
173
174
what is Group birefringence
175
176
Knowing the s\_\_\_\_\_\_ one can map the temperature distribution to the fibre distance
177
178
179
180
181
182
183
184
185
186
187
what is a tool trap
188
189
•The intensity of the _____ band is temperature sensitive.
190
191
192
what is attenuation
193
194
195
196
197
what is band-pass filtered
only shows certain frequencies
198
what is a pack-off sub
199
what is the lubricator
200
201
202
203
204
The underlying principle of the ULTIMA DTS is ____ and \_\_\_\_\_
205
206
207
what is a ball check valve
208
209
what is an optical circulator
210
211
what is a measuring head
212
what is the spacial resolution of ULTIMA
213
214
Small form-factor pluggable transceiver
215
216
217
218
what is a mule shoe
219
what is an SFP
220
221
222
223
