What's EDFA 

Erbium Doped Fiber Amplifier is short for EDFA,which was applied in 90 s in the optical fiber transmission system and its popularization and application of optical fiber communication technology has brought a revolution.EDFA is in small volume,low power consumption,easy to us.What’s more,it is convenient to install all kinds of application systems,such as SDH frame inside,CATV machine box, DWDM system frame.as one of a functional modes of the Optical fiber amplifier system,there are generally two kinds of methods to insert the network management system.One is 232c interface circuit with optical fiber amplifier to transfer parameters of the optical fiber amplifier and alarm information to the network management system,unified management,display and disposal.

Using EDFA Amplifier for Long-Haul CATV Systems

With Laser technology combining with fiber optic technology, CATV systems in the field of optical communication have demonstrated unprecedented and irreplaceable achievements in the past few decades. When transmitting optical signals with fibers, fiber attenuation is the main factor that limits the transmission distance. EDFA (Erbium-Doped Fiber Amplifier) designed for CATV long-haul transmission avoids the conversion of optic-electric-optic in CATV long-haul transmission. It amplifies low signal power into high signal power, thus extending transmission distance. This post analyzes EDFA configurations and the utilization in long-haul CATV systems.

EDFA Leading Position in CATV Systems

EDFA is one of the most prominent achievements in fiber optic transmission technology over the past decade. Because it cleverly combined the laser technology and optical fiber manufacturing technology in the CATV systems and its applications were then rapidly expanded. Originally PDFA and EDFA amplifiers were equally used for CATV systems, but today, EDFA has completely replaced PDFA and become the primary device for fiber optic transmission systems. Why EDFA has leading position on CATV systems? Because EDFA noise and distortion characteristics are better, and its superior characteristics can be clearly seen in the following:

Operates at wavelength of 1550nm, consistent with C-band where fiber has the lowest loss

Has higher saturation output power, useful in systems requiring transmission up to 100 km or systems requiring the optical signal to be split to multiple fiber optic receivers

The signal gain spectrum is wide up to 30nm or more, can be used for broadband signal amplification, especially for WDM (wavelength division multiplexing) system, ideal for radio and data services networks

Has user friendly interface RS232, easy to control and monitor with computers

Low noise figure with high stability

PUSMAI EDFA has undoubtedly received wide interest for CATV applications because of its high output power, low distortion and low noise capability. PUSMAI upplies optical amplifiers including CATV EDFA, SDH EDFA, DWDM amplifier, etc.