Section 2-E Flashcards
Finer Optics
The transmission of information on a modulated beam of light.
Optical Fiber
Glass or plastic fiber no thicker than a human hair. Designed to guide light to destination.
Advantages of Finer Optics
- longer distances
- less signal loss
- immune to electromagnetic interference
- wiretapping is harder to accomplish
- no explosive
- lighter and thinner
Disadvantages of Fiber Optics
- more expensive
- more fragile
- difficult to splice
Total Internal Reflection
When the angle of incidence exceeds the critical angle, light cannot get out of the glass. The light instead bounces back in.
Three comments of Fiber Optics Cable
Core
Cladding
Coating
Core
Thin glass or plastic center used to transmit light.
Cladding
Reflective and refractive surface used to propagate the light along the core.
Coating
Surrounds the cladding and adds a layer of protection to the fiber.
Single Mode Cable
Single strand of glass Fiber with a core diameter 8 to 10 microns. Only transmits one frequency.
.000039 of an inch
Multimode Cable
Glass fibers 50 to 100 microns. More pathways are available for light to travel. Diameters are 50, 62.5 and 100 microns.
Strait Tip Connector (ST)
Slotted bayonet style connector.
Subscriber Connector (SC)
Push pull type Connector preferred in newer installations.
Coaxial Cable
Transmission line for high power and high frequency radio frequency signals.
Flexible Coaxial Cable
Capable of transmitting high power at high frequencies with minimal loses. Power losses are likely due to dielectric loss and skin effect.
