Unit 9 (text B) Q Flashcards
What does optical communication promise?
Considerable increase in:
Capacity
Quality
Performance
Reliability of global telecommunication network
What is a digital communication network capable of?
Processing and transmitting virtually any kind of information
What are two combined technologies?
Laser and ultra-thin silicon
Do optical systems require any amplifiers or regenerators?
No, they don’t
But if the distance of transmission is more than 135 km, they require
When were the first digital optical discs produced?
In 1982
When were the first digital optical discs produced?
How is the information recorded and read?
By a powerful laser to imprint bubbles on the disc’s surface
What are the advantages of optical discs?
Indestructibility
Storing more information than predecessors (предшественники)
What are the disadvantages of optical discs?
They are “read-only” devices
How do the companies try to avoid the problem of “read-only” devices?
They produce DVD rewritable drives
Are optical electronic computers used today?
Yes, they are
