  We derive limits for wave optics simulations of plane wave propagation in
non-Kolmogorov turbulence using the split-step method and thin phase screens.
These limits are used to inform two simulation campaigns where the relationship
between volume turbulence strength and normalized intensity variance for
various non-Kolmogorov power-laws. We find that simulations of smaller power
laws are limited turbulence strengths with Rytov numbers of 7 when the
simulation side-length sampling rate is 8192. Under these same conditions it is
possible to simulate volume turbulence strength out to Rytov numbers of 12 for
Kolmogorov power-laws and higher. We show that the peak scintillation and Rytov
number where peak scintillation occur increases monotonically with power-law.
Also, that if turbulence strength is fixed, the relationship between
scintillation index and power-law depends on the operating regime. In weak
turbulence the relationship is negative, and it is positive in stronger
turbulence. This work also emphasizes the importance of properly scaling
turbulence strength with comparing results with different power-laws and the
influence and importance of defining inner and outer scales in these
simulations.
