what is the role of every types of lasers in optical communication ? and how does it work ?
Diode lasers are the key components of any broadband communication systems. They have employed as a high-speed transmitter in digital and analogue fibre optic networks, to pump lasers in Erbium-doped amplifiers (EDFAs), or as high-power pulsed lasers in test and measurement field.
Digital data transmission: Optical communication is any form of telecommunication that uses light as the transmission medium. An optical communication system consists of
- a transmitter, which encodes a message into an optical signal,
- a channel, which carries the signal to its destination, and
- a receiver, which reproduces the message from the received optical signal.
RF-over-fiber technology refers to the transmission of analogue multiplexed radio-frequency signals over an optical fibre medium.
RF-over-fiber technology delivers unprecedented performance levels for a broad range of applications from wireless networks to high-frequency signal distribution in avionics and military.
Optical time domain reflectometry (OTDR) is a fast-spreading test method for checking the condition of fibre optic cabling. As the fibre optic networks are built closer and closer to end users the cablings are laid in an increasingly demanding environment requiring easy and simple diagnostics. In OTDR high power laser pulses are shot out to
In OTDR high power laser pulses are shot out to fibre cabling and the condition of the fibre link can be determined from the back reflection of the pulses.
Benefits of using the laser in the optical communication is
1. Large capacity for carrying signals
2. Low losses
3. Non-interference between signals
4. Transmission lines are parallel
How it works:
Information can be modified on the laser beam and transported from one point to another at high speed and finite accuracy.
The laser beam's ability to transmit information is much higher than microwaves (MW) or radio waves (RW).
Optical communication has been one of the driving forces in developing laser diode technology. Today, diode lasers are the key components of any broadband communication systems. They are employed as high speed transmitter in digital and analog fiber optic networks, to pump lasers in Erbium doped amplifiers (EDFAs), or as high-power pulsed lasers in test and measurement field.
Digital data transmission is an important part of modern society. Optical communication is any form of telecommunication that uses light as the transmission medium. An optical communication system consists of a transmitter, which encodes a message into an optical signal, a channel, which carries the signal to its destination, and a receiver, which reproduces the message from the received optical signal.
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