Gain Stability of Erbium Doped Fiber Amplifier
Abstract: Erbium doped fiber amplifier was pumped by A l-free 980nm InGaAs/ InGaAsP/ InGaP high power quantum well laser. At pump power of 20mW, the gain is 33dB, the maximum gain coefficient is 6 . 7dB/ mW and the saturated output power is 6dBm. The gain is as a function of fiber length and pump powers , it is also as a function of output powers. 1 Introduction With the deep development of optical communication technology, the development of erbium-doped fiber amplifier (EDFA) as a direct optical amplification technology has become the mainstream of today's research. EDFA has the compatibility of erbium-doped fiber and communication fiber, low coupling loss, good stability, high gain, high bandwidth, high efficiency, low noise, no polarization dependence, and simple structure. Due to its small size, easy to use and high practical value. Therefore, it is a key component for achieving all-optical fiber-optic communication, such as coherent optical communicatio...