Applications:
(1) Communication:
Optical fibers are used in communication to transmit signals for long distances. An optical signal derived from electrical analog signal is transmitted through the optical fiber. At the other end again the optical signal is converted into electrical signal.
For example:
First voice is converted into electrical signal using a transducer. It is digitized using a Coder. The digitized signal, which carries the voice information, is fed to an optical transmitter. The light source in optical transmitter (L E D or Laser Diode) emits modulated light, which is transmitted through optical fiber.
At the other end the modulated light signal is detected by a photo detector and is decoded using a decoder. Finally the information is converted into analog electrical signal and is fed to a loud speaker, which converts the signal to voice (sound).
(2) Fiber Endoscope:
Endoscope is an optical instrument used to visualize or photograph Human internal body parts. The light needed for photographing the part is carried by the optical fiber.
(3) Optical fibers are used in local area networks.
(4) They are used in Data Links. Advantages:
(1) Optical fibers can carry very large amounts of information in either digital or analog form.
(2) The raw material for optical fiber is of low cost and abundant.
(3) It has low cost /meter/ channel.
(4) Cables are very compact.
(5) Signals are protected from radiation from lightning or sparking.
(6) There is no energy radiation from fiber.
(7) No sparks are generated.
Disadvantages:
(1) The optical connectors are very costly.
(2) Maintenance cost is high.
(3) They cannot be bent too sharply.
(4) They under go structural changes with temperature.
1. What is the significance of applications in the context of computing? |
2. How are applications developed? |
3. What are the different types of applications? |
4. How do I install applications on different devices? |
5. How can I update applications on my device? |