Research On Chaotic Light Source For Correlation Ranging Technology

With wideband, intrinsically random without periodicity and non-ambiguous correlation properties, chaotic signal has wide applications prospect in many fields. Chaotic correlation laser ranging system which utilized its unique correlation character realizes highly spatial resolution with good anti-jamming performance. Many methods have been found to generate chaotic light at the present time, and different chaotic-light-generated devices are applied to special domain. But every device is as simple as generated a broad bandwidth which have met the criterion already. Therefore, highly integrated chaotic light source with wideband possesses extremely expandable space in future application.The main works of this dissertation are summarized as follows:1. We introduce the principle of the chaotic correlation laser ranging system, and make request for the chaotic source depending on the key parameter of the chaotic ranging system.2. We have studied on the influence of the bias current, the feedback strength and the external cavity in the chaotic signal generation of the semiconductor laser with feedback theoretically, and then confirmed the range of the parameters which could generate the chaotic signal for ranging system.3. We have studied on the influence of the bias current and the feedback strength in the chaotic signal generation of the semiconductor laser with feedback experimentally, and confirmed the range of the parameters which could be applied to practice.4. Two simple chaotic sources are made based on the range which is defined by the results of the theoretical and experiments research. According to the comparison between them, we select one to provide the chaotic laser for the prototype chaotic lidar.