M5.10 Flashcards
(24 cards)
Fibre optics: What speed is coax cable preferred
2 to 50 mbps
Fibre optics: What is used to transmit data
Light
Fibre optics: How is light leakage eliminated from fibre optics
Surrounding the fibre with an opaque jacket
Figure optics: Greatest advantage of fibre optics
Bandwidth
Fibre optics: What is the relationship between length and bandwidth in parallel fibre optics
Bandwidth varies inversely with length
Fibre optics: Limitations of fibre optics
Need for optical/ electrical conversions maintenance
Fibre optics: Fibre optic data buses require what
- Light source
- Transmitter
- Fibre optic cable
- Receiver
Fibre optics: What are the 3 main parts of a fibre optic cable and what do they do
Core - where light travels
Cladding - reflects light back into the core
Outer jacket - protects the cable from damage
Fibre optics: Speed of light
3x10^8m/ s
Fibre optics: what is refraction
The bending of light as it passes across the boundary of one medium to another
Fibre optics: What is the more dense medium core or cladding
Core
Fibre optics: How do we achieve total internal refraction
By having the angle of incidence of the input waves is greater than the critical angle
Fibre optics: For rays to propagate down a fibre it must enter at what zone
Acceptance zone
Fibre optics: What is numerical aperture
A measure of light gathering or collecting power of a fibre optic
Fibre optics: what is attenuation
Losses of light through a fibre optic
Fibre optics: What is a mixture of light waves called
Polychromatic
Fibre optics: what is BDP stand for
Bandwidth distance product
Fibre optics: What is BDP
Bandwidth of fibre multiplied by length
Fibre optics: Unit of BDP
MHz.km
Fibre optics: How do we reduce losses in terminations
Alignment of the mated fibres
Fibre optics: What is a common method used to prepare fibres for termination
The scribe and break method
Fibre optics: What connectors do aircraft commonly use
SMA (sub-miniature version A)
Fibre optics: What is a star coupler well suited for
Connecting a large number of terminals to the fibre optic network
Fibre optics: Fibre optic safety precaution
Fibre optic light can damage eyes
