What is EDFA?How does EDFA work?And what are the types of EDFA?
What is EDFA? EDFA is an optical repeater device that is generally used in the C and L bands, almost between 1530 and 1565nm.The fiber is doped with the rare earth element erbium, allowing the glass fiber to absorb light at one frequency and emit light at another frequency.At present, EDFA optical fiber communication is usually used to compensate for the optical fiber loss in long-distance optical communication. Its power transmission efficiency, large dynamic range, low noise number and no polarization are high, which is an ideal solution for wave-division and multi-channel (WDM) applications and long-distance applications. How does EDFA work? The basic structure of an EDFA consists of a length of Erbium-doped fiber (EDF), a pump laser, and a WDM combiner. The WDM combiner is used to combine signals and pump wavelengths, allowing them to propagate simultaneously through the EDF. For example, 1550nm light signal, into the EDFA amplifier from the input. The 1550nm signal com...