提出了一种基于空间散斑的极弱散射随机激光系统,并用该系统在不同抽运条件下分别实现了相干反馈输出和非相干反馈输出。结果表明,两种反馈机制存在内在的联系。提出了随机腔耦合的概念,对弱散射随机激光器的模式特性给出了合理的解释。 A very weak stochastic stochastic laser system based on space speckle is proposed. The system is used to output coherent feedback and non-coherent feedback under different pumping conditions. The results show that the two feedback mechanisms are intrinsically linked. The concept of stochastic cavity coupling is proposed, which gives a reasonable explanation of the mode characteristics of weakly scattered stochastic lasers.