In this paper are presented the results regarding the simulation and the implementation of an enhanced communication interface based on pulse position modulation technique. The proposed module is aimed for integration in the conditioning circuits of the sensors that are connected to data acquisition systems which require transmission of information signals over short to moderate distances. Because the circuit allows that the optical driver of the transmitter to be operated at high power levels results an increased signal-to-noise ratio and an extended lifetime for the optical source. These advantages make this design particularly suited for the free space laser or optical fiber based data transmission in sensor networks. The novel approach based on variable width carrier pulses allows the control of the frequency spectrum for the transmitted signal and an improved signal-to-noise ratio, these characteristics leading to increased performances for the proposed module. Compared with other circuits based on cable or radio transmission, the optical communication interface presented in this paper represent a very suitable solution for transferring the signals from sensors, because it ensures high immunity to interferences and superior data transfer rates.