We study chaotic synchronization in degenerate optical parametric oscillators(DOPOs) by hyperchaotic signal modulating parameter.It shows that synchronization or inversed synchronization is realized in two or more chaotic systems by adjusting modulating coefficient as the maximum condition Lyapunov exponent(MCLE) of the system is negative.It is observed that the synchronization states depend on initial conditions and modulating coefficients.Under certain initial conditions,the synchronization state shows spontaneous mutation at some modulating coefficients.