INFLUENCE OF THE SPAN LOSS VARIATION IN CASCADED EDFAS ON THE RECEIVER DYNAMIC-RANGE IN WDM SYSTEMS

Influences of the gain or the span loss variations in cascaded EDFA's on the receiver dynamic range are investigated for WDM systems and com pared the results with single channel systems, The optical power dynam ic range of the receiver additionally required in the WDM system is ap proximately proportional to the number of cascaded EDFA's and the span loss margin, The slope coefficient is about 0.12 dB/EDFA/ (dB in the span loss margin) when the channels are allocated in the region of 154 5-1557 nm, The increment of optical power dynamic range becomes smalle r for the channels allocated near 1545 mm.