581810.fig.002
Figure 2: Contour plots of signal gain (in dB) for an 8 mm long SRA in the plane formed by the factors 𝑆 𝑠 and 𝑆 𝑝 varying in the range 1 to 10. The location marked by + corresponds to the peak gain of 17.7 dB. Here, 𝐼 𝑝 0 = 3 0  MW/cm2, 𝐼 𝑠 0 = 0 . 1  MW/cm2, 𝛼 = 1  dB/cm, and 𝜏 𝑐 = 0 . 2  ns. Other parameters are the same as in Figure 1. The red curve shows how the gain peak’s position drifts as 𝐼 𝑝 0 changes from 15 MW/cm2 at point A ( 1 0 , 5 . 1 3 ) to 300 MW/cm2 at point B ( 2 . 9 , 1 ) .