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Fiber basics > basics (Mayte) > Flashcards

basics (Mayte) Flashcards

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optical power

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8
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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.

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9
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10
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what is the definition of poroelasticity

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11
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what’s the difference between temperature accuracy and resolution

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12
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17
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18
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19
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what are the 2 types of refractive index profiles

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20
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21
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Light is confined inside the optical fibre thanks to _______

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22
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Knowing the s______ one can map the temperature distribution to the fibre distance

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23
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what is modal dispersion

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24
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27
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28
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what are the most common materials used in fiber optics

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29
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30
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31
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32
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what is pulse width

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33
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34
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35
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36
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37
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38
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39
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40
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•The temperature resolution degrades _____ over distance. This is caused by the _________.

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41
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42
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48
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49
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50
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what is the equation of NA

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51
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describe the refractive index profile for single mode and multimode fibers

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52
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53
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54
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what is IOR

A

optical index of refraction

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55
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56
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57
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What is “V number”

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58
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59
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what are the advantages of using graded-index fiber versus single-index fiber

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60
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61
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what is Modal birefringence

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62
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63
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what are the advantages to multimode fiber

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64
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65
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66
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67
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what is a multiplexer

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68
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69
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72
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what is the effective index

78
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what is attenuation

85
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what is phase velocity

87
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what are the 3 types of backscattered photons

96
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what is Group birefringence

97
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what is group velocity

99
Q

Stokes and anti-Stokes signals experience _____ losses.

113
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what are fiber modes

114
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what is Δα.

117
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what is chromatic dispersion

119
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•Loss occurs because a small portion of forward propagating light is_________

120
Q

what is FIMT

A

fiber in metal tube

121
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what is cutoff

123
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The underlying principle of the ULTIMA DTS is ____ and _____

124
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•The intensity of the _____ band is temperature sensitive.

126
Q

how does the OTDR work

(optical time domain reflectometer)

131
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What is NA?

140
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what is mode area

141
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what is an OTDR

A

optical time domain reflectometer

149
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what is a walkaway VSP

150
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what is an offset VSP

167
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what does RAID stand for

170
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what is an LAS file

171
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what is an SFP

172
Q
  1. An APC reduces the risk of ________
A
  1. An APC reduces the risk of direct light reflection
173
Q

how can you tell the differencet between the FC/PC and E2000 connectors

Fiber basics (12 decks)

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