Survey of Four Wave Mixing with Different Number of Channels under the Impact of Different Channel Spacing

In this paper, literature survey of four wave mixing (FWM) effect in optical communication system for different number of inputs channels at various channel spacing. It reveals that FWM is minimum when minimum number of input channels with maximum channel spacing. It is also studied that on increasing the channel spacing, the interference between the propagating waves decreases and hence FWM effect also decreases. Also, on increasing the number of users or reducing the channel spacing, the interference between the input frequencies increases and thus the FWM effect also increases.