Practical application of erbium-doped fiber amplifier

Erbium-doped fiber amplifier in the conventional fiber-optic digital communication system, you can save a large number of optical repeaters, and the relay distance is greatly increased, which is important for the long-distance fiber optic trunk system. Its main applications include:

1, can be used as optical distance amplifier. Traditional electronic fiber optic repeater has many limitations. Such as, digital and analog signal conversion, the repeater to make the corresponding changes; equipment from the low rate of change into high speed, the repeater to be replaced; only the same wavelength optical signal transmission, and complex structure, expensive, and so on. Erbium-doped fiber amplifier to overcome these shortcomings, not only do not have to change with the change in signal mode, and equipment expansion or used for optical wavelength division multiplexing, there is no need to replace.

2, can be used as an optical transmitter post amplifier and optical receiver preamplifier. As a post amplifier of optical transmitter, the transmission power of laser can be increased from 0db to +10db. As a preamplifier of optical receiver, its sensitivity can be greatly improved. Therefore, only 1-2 erbium-doped amplifiers on the line, the signal transmission distance can be increased by 100-200km.

In addition, erbium-doped fiber amplifier to be solved

Erbium-doped fiber amplifiers have been recognized by the world's unique superiority, and has been more and more widely used. However, erbium-doped fiber amplifiers also have certain limitations. For example, in long-distance communication can not be up and down the voice path, the station business contact is difficult, not easy to find faults, pump light source life is not long, with the continuous progress of fiber optic communication technology, these problems will be solved completely.