The growth and decay (GD) of current signals have been studied by using a guest/host nonlinear optical polymer (NOP) film consisting of 8% Disperse-Red-1 in PMMA. The interesting phenomenon of GD signal of NOP film have been observed by two ways (i) using the electro-poling experiments (EPE), and (ii) thermal stimulate depolarization current (TSDC) measured technique. It has been observed from EPE studies that the increment of the poling-rate and poling-field does not affect the GD character of current signal of the sample; they affect the magnitude of signal. The relative decay values of TSDC signal are found less in case of pure PMMA than those of the doped-sample but signal characters remaining same. It has also been noticed that the GD signal depends on the external sources of energy and other parameters such as, poling-voltage, thermal energy, temperature, etc. These pieces of information are useful for the new NOP devices.