We have experimentally realized the on-off intermittency in a synchron
ization process between two unidirectionally coupled nonlinear oscilla
tors. The exponent of the power law of the conditional probability of
the laminar phase in our case is found to be -3/2 and we have found th
at the ''on-off'' intermittency is related to the fluctuation in the t
ransverse Lyapunov exponents.