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Dan2024 Study > Fiber-Light Characteristics-Quizlet > Flashcards

Fiber-Light Characteristics-Quizlet Flashcards

1
Q

what are the two scientific properties that allow light ot travel inside of a specialized
piece of glass

A

Refraction and refection

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2
Q

one form a intrinsic loss is this

A

dispersion

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3
Q

Polarization-mode dispersion occurs when these two components travel through
the fiber at different velocities

A

vertically and horizontally

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4
Q

small irregularities in the core to cladding interface that cause reflections that allow light to be refracted out of the core

A

Microbend

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5
Q

RIN

A

Relative intensity noise

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6
Q

refers to the ratio of power applied to the power reflected, expressed in dB

A

return loss

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7
Q

fiber connectors fall under
these two categories

A

Flat polish and FC flat polish

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8
Q

reflections that occur at places where the light travels from one medium to another such as at the interface between the optical fiber connector and the air gap between it and the mating
connector.

A

Fresnal reflections

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9
Q

the core of the fiber has different frequencies in this
measurement

A

THz (power of 12)

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10
Q

the contact area of the fiber is this is large, in micrometers

A

250 - 300 micrometers

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11
Q

this connector is used on a
diplexer or return receiver module

A

MPO (multple fiber push one)

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12
Q

MPO

A

Multiple fiber push on

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13
Q

this connector is used for digital return path transmitter
SFPs

A

LC/UPC

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14
Q

list the three common
methods to clean fibers

A

wet, dry, combination

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15
Q

in a mechanical splice this is used to fill any potential air gap between the fiber end
faces

A

index matching gel

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16
Q

PAS

A

Profile Alignment System

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17
Q

BNC

A

Bayonet Neil-Concelman

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18
Q

visible spectrum is from this
range in THz

A

400 to 790 THz

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19
Q

is a measure of that reduction in spped has the light decreases casue of increases
in density

A

Index of refraction (IoR)

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20
Q

3 materials that make up the
core and the cladding

A

plastic, glass, silica

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21
Q

different paths in the fiber are
referred to as

A

modes

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22
Q

when working on a fiber you
should have this type of mat

A

tacky mat

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23
Q

is generally a digital transmission unit or data packet. Included is a sequence of bits that enable the receiver to detect the beginnin and end of a packet in the stream of bits or symbols

A

Frame

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24
Q

when two optical transmitters sendlight upstream at the same time and both transmitters are on exactly the same optical wavelength causing the transmissions to be lost due to distortion of
optical signal

A

OBI (Optical Beat interference)

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25
Q

Fiber scop will have these
three components

A

probe, analysis software, display

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26
Q

this organization set the standards for optical
connections

A

IEC (International Electrotechnical Commisson)

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27
Q

Fiber will have this many
zones

A

4

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28
Q

List the 4 zones of the fiber

A

core, cladding, adhesive, contact

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29
Q

IEC

A

International Electrotechnical Commission

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30
Q

This color indicates the fiber
is single mode

A

Yellow

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31
Q

This color indicates the fiber
is multi-mode

A

orange

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32
Q

This color indicates the fiber is optimized for multimode 10
Gb

A

aqua

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33
Q

PnP

A

Plug and Play

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34
Q

IoR

A

Index of Refraction

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35
Q

Docsis mediation layer
creates this on every ONU

A

virtual Cable modem (vCM)

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36
Q

dBm

A

decibel per millawatt

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37
Q

dBW

A

referenced to 1 watt

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38
Q

allows an operator to remotely locate part of the hub electronics in the access network

A

v-hub

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39
Q

PPM

A

PON Power meter

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40
Q

provides a visible light source that can be be launched
down the fiber to find faults

A

VFL Visual Fault locator

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41
Q

this organization created the
OSI model

A

ISO International Organization for Standardization

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42
Q

Bandwith of OFDMA

A

96 MHz

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43
Q

1550 nm is equal to this
frequency

A

193.5 THz

44
Q

1310 nm is equal to this
frequency

A

229 THZ

45
Q

the coating is color-coated
for indentification purposes

A

Fiber bundles

46
Q

Mutiple blocks of the OFDMA
section is called

A

Mini slots

47
Q

are defined with specific bit-
loading and pilot pattern

A

Mini-slots

48
Q

Two variables can vary between mini slots within the
profile

A

Bit-loading and pilot patterns

49
Q

This has no gain, but adds attenuation in the signal path
where it is installed

A

Passive device

50
Q

ACI

A

Adjacent Channel Interference

51
Q

is often used to describe the impact Mid Split CM transmissions have on other
CPE devices

A

Adjacent Channel Interference (ACI)

52
Q

loss between the optical transmitter in the hub and the input to the R-ONU is known as

A

Optical loss budget

53
Q

loss between the Optical Line terminal and the optical
network unit is known as

A

Optical loss budget

54
Q

RFOG requires a high optical transmit level and this device
is needed to achieve that

A

EDFA Erbium Doped Fiber Amplifier

55
Q

Mux/Demux loss per dB

A

3 dB

56
Q

32 way splitter loss, in dB

A

17.5 dB

57
Q

Group sizing splitter loss in
dB

A

3.5 dB

58
Q

This summarizes the power levels that will result in a network baed on the transmit power levels and losses in the
network

A

Power budget

59
Q

Optical loss budgets are
described in terms of this

A

dB

60
Q

optical power are described
in terms of

A

dBm

61
Q

FD

A

Fiber Deep

62
Q

16 way splitter has loss of, in
dB

A

14.5 dB

63
Q

PPM

A

PON Power Meter

64
Q

1 Gb EPON downstream

A

1490 nm

65
Q

1Gb EPON upstream

A

1310 nm

66
Q

is one of the most powerful tools that may be used during the installtion or maintenance
of a FTTP network

A

OTDR

67
Q

This tool injects a pulse of light into one end of a fiber and analyzes the backscatter and reflected signal coming back

A

OTDR

68
Q

is an optical measurement tool used to detect multiple optical channels sharing the
same fiber

A

Optical Spectrum Analyzer OSA

69
Q

OSA

A

Optical Spectrum Analyzer

70
Q

provides a visible light source
that can be launched down the fiber

A

VFL Visual fault locator

71
Q

is a full strength solvent specifically developed for removing cable gels, blocking compounds Icky Pic,
and C- cement

A

D’Gel and tool cleaner

72
Q

are specially designed to leave no solid residue and avoid scratches on the
connector end face

A

Lint Free Wipes

73
Q

dispense lint free cleaning wipes in a disposable tape form that is small enough to
reach recessed connectors

A

Connector Cleaner

74
Q

Fiber deep nodes are within
this many feet of the customer homes

A

1,000 ft

75
Q

2 way optical splitter in fiber deep nodes can travel in this
range

A

0 -25 km

76
Q

3 way optical splitter in fiber deep nodes can travel in this
range, in km

A

0-15 km

77
Q

4 way optical splitter in fiber
deep nodes can travel in this range, in km

A

0 -14 km

78
Q

without way optical splitter in fiber deep nodes can travel in this range, in km

A

0 -40 km

79
Q

A device that generates a
light source used in optical fiber communication

A

Laser

80
Q

Use this tool to assure a firm grip on the glass and provide easy handling for proper
disposal

A

Teflon-tipped tweezers

81
Q

The wavelengths above this
nm are not visible to the eye

A

650 nm

82
Q

The wavelengths above 650
nm are not visible to the eye

A

Red light

83
Q

core has a higher index of
refraction than the cladding

A

This is a Statement Card

84
Q

cladding has a lower index of
refraction than the core

A

This is a Statement Card

85
Q

IoR

A

Index of Refraction

86
Q

Light passing from a lower density to a higher density is refracted toward the normal
is known as

A

Angle of incidence and angle of refraction

87
Q

is the angle between the
incident ray and normal

A

Angle of incidence

88
Q

is the angle between the
refracted ray and the normal

A

Angle of refraction

89
Q

one form of intrinsic loss is

A

Dispersion

90
Q

is the spreading in time of an optical signal as it travels down the length of an optical
fiber

A

Dispersion

91
Q

results when different wavelengths travel through a fiber at different velocities

A

Chromatic Dispersion

92
Q

occurs because a small amount of light travels in the interface between the core
and cladding

A

Waveguide dispersion

93
Q

occurs when the vertically and horizontally components
travel at different velocites

A

Polarization mode dispersion PMD

94
Q

is the loss of optical energy due to imperfections in the fiber and in the basic
structure of the fiber

A

Scattering

95
Q

changes in the density of the fiber and variations of the composition that occur
during manufacturing

A

Rayleigh Scattering

96
Q

is composed of those reflections that are reflected
towards the input of the fiber

A

Backscattering

97
Q

these are small irregularities in the core to cladding interface that cause reflections that allow the light to be refracted out of the
core

A

Microbends

98
Q

ITU code covers the definition of the framing structure and modulation for digial multi-programme
signals for television

A

J.83

99
Q

This will make profile adjustments to the mini-slots
to mitigate customer impact

A

Octave

100
Q

SLT

A

Stranded Loose Tube

101
Q

3 different types of fiber

A

Stranded loose Tube SLT, Central tube, Tight buffered

102
Q

Multimode fibers have a diamter in this micron range

A

50 to 100 mm

103
Q

The most common core size
of multimodes fibers

A

62.5 mm

104
Q

YAG

A

Yetterbrium Aluminum Garnet

105
Q

800 - 1600 are sensitive to light with these two elements

A

Germanium and indium-arsenide

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