English: First released in the year 2008, the Short Range Lidar is used to detect closing vehicles in front and, if necessary, initialize an emergency braking maneuver. The current sensor has a range of about fourteen meters. The scope of this thesis is to investigate approaches in order to improve the range. The range is in fact limited by two factors: 1. Only a limited number of registers are available to store the echo signal. 2. The Signal-to-Noise Ratio(for low reflective targets). After evaluating the sensor in itâ s current status, this thesis presents some approaches to solve the issues we presented earlier. At distances further than the standard range of 14 meters, the echo signal stored in the sensor is not complete, hence it has to be reconstructed. A first method is discussed: a mathematical modelisation of the laser pulse is proposed and then used to reconstruct the echo signal. Then a second method is proposed: changing the sampling frequency of the analog-todigital conversion. The range is also limited by the SNR for low reflective targets. Some possible options regarding the amplification stages of the SRL are also discussed. One of the options consists into changing the gain value of the transimpedance amplifier included in the sensor. The other option was to include a new preamplifier designed specifically for optical signals.