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bowman > fibre > Flashcards

fibre Flashcards

1
Q

In the context of optical fibre, expand the acronym BFA

A

Bare Fibre Adaptor

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2
Q

In the context of optical fibre, expand the acronym SC

A

Subscriber Connecter

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3
Q

In the context of optical fibre, expand the acronym STPC

A

Straight Tip Physical Contact

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4
Q

In the context of optical fibre, expand the acronym FCPC

A

Face Contact/Physical Contact

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5
Q

In the context of optical fibre, expand the acronym LC

A

Lucent Connector

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6
Q

In the context of optical fibre, expand the acronym MTRJ

A

Mechanical Transfer Registered Jack

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7
Q

In the context of optical fibre, expand the acronym APC

A

Angle Physical Connector

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8
Q

What is Micro Bending

A

Micro bends are caused when external pressure causes any amount of permanent damage to the core/cladding interface.

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9
Q

What is Macro Bending

A

Macro Bending are caused by exceeding the bend radius of the cable

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10
Q

Name 2 items/Tools you would use to prepare a Primary coated fibre for splicing

A

Eye Protection, Cinbin

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11
Q

What is the main purpose of the primary coating on silica optical fibre?

A

To protect the core and the cladding

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12
Q

Why is spare fibre coiled inside a patch panel/termination enclosure

A

To allow for re-termination

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13
Q

What is the purpose of the v-groove of a fusion splicer?

A

To locate and hold the fibre

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14
Q

Name 2 items/tools you would use to prepare a secondary coated fibre for splicing

A

Eye Protection, and Cinbin

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15
Q

The class of laser being used as a light source can be determined by what?

A

the attached safety label

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16
Q

Light sources are one of the hazards associated with working with fibre optics. List 2 more hazards?

A

Chemical, Explosion

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17
Q

Name a type of photodiode used in fibre optics?

A

Avalanche Photo Diode

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18
Q

What colour is used to identify OM1 patch cords?

A

Grey

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19
Q

What colour is used to identify OM2 patch cords?

A

Orange

20
Q

What colour is used to identify OM3/4 patch cords?

A

Aqua

21
Q

What colour is used to identify OM5 Patch cords?

A

Lime

22
Q

What colour is used to identify OS1a/OS2

A

Yellow

23
Q

What colour is used to identify an APC connector

A

Green

24
Q

name 3 parts of fibre from inside to outside?

A

Core, Cladding, Primary

25
Q

For what purpose is Loose tube cable used?

A

External connection between buildings in horizontal plane.

26
Q

Give an advantage that single-mode fibre offers over multimode fibre?

A

Lower attenuation

27
Q

Chemicals is one of the hazards associated with fibre optics, list 2 safe working practises?

A

Do not inhale, do not ingest

28
Q

What is one of the drawbacks of continuity testing with VLS?

A

Does not give a loss value.

29
Q

Which part of an all-glass fibre has a variable diameter?

A

The core

30
Q

What must you check before commencing testing on fibre?

A

Ensure the fibre is not carrying live data
ensure you have the correct fibre test leads

31
Q

What are the two indexes of multi-mode fibre?

A

Stepped index
Graded index

32
Q

Equipment is one of the hazards associated with working with fibre optics, what is a safe working practise?

A

Equipment is PAT tested

33
Q

What is the purpose of an electro optical transducer in a fibre optic link?

A

It converts electrical signals into optical signals it is a Transmitter

34
Q

In standard single mode fibre what wavelength is the Zero Dispersion Point?

A

1310nm

35
Q

What are the operating wavelength used for transmission in MM fibre optic communications?

A

850nm and 1300nm

36
Q

What is one of the advantages of fibre optic communication over copper?

A

Wide Bandwiths

37
Q

What is propagation of light?

A

Propagation of light refers to the manner in which an electromagnetic wave transfers its energy from one point to another.

38
Q

Name on of the conditions required for Total Internal Reflection to take place?

A

The core must be DENSER than the cladding

39
Q

Depending on the refractive index of the material two main processes generally occur when light passes between boundaries from media to another, name 1?

A

Refraction

40
Q

Name on of the factors that may affect attenuation that we cant control?

A

Quality of the basic raw materials

41
Q

Name one of the factors that may affect attenuation that we can control?

A

The wavelength used

42
Q

We spoke about 4 types of dispersion in fibre optic communications, name 1?

A

Modal Dispersion (multimode fibre)

43
Q

In the context of optical fibre, expand the acronym LED?

A

Light Emitting Diode

44
Q

In the context of optical fibre, expand the acronym LASER

A

Light Amplification by the Stimulated Emission of Radiation

45
Q

In the context of optical fibre, expand the acronym VCSEL

A

Vertical Cavity Surface Emitting Laser

bowman (2 decks)

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