Figure 6

Measured (a) efficiency of probe transmission signal, (b) efficiency of enhanced four wave mixing band gap signal (Er) versus Δ2 with Δ3 = 230 MHz, Δ1 = 280 MHz and P2 = 3 mW, when we set the power of E1(P1) from top to bottom as (1) 2.68 mW, (2) 2.01 mW, (3) 1.10 mW, (4) 0.62 mW and (5) 0.43 mW, respectively. (c) Output signal intensity (enhanced FWM BGS whose intensity is the one of the highest point on the peak of each sub curve in (b)) versus input signal intensity(FWM BGS whose intensity is the one of the baseline in each sub curve in (b)).