2. Multiplexing techniques
There are four main approaches to multiplexing, i.e. building up a very-high-speed data stream (called a multiplex) from several lower-speed data streams, known as tributaries. The first three are used commercially, while the fourth is still only a subject of study in research laboratories. Naturally, the amount of information transmitted increases when several multiplexing techniques are used simultaneously. The capacity of a system is defined as the total data rate it is capable of transmitting in a single optical fiber.
2.1 Time division multiplexing
Time-Division Multiplexing (TDM) is the most traditional technique for producing a data stream at bit rate mB, from m data streams (the tributaries) at bit rate B
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Multiplexing techniques
Amplification techniques
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