对多量子阱被动锁模半导体激光器的噪声理论进行了系统的分析 ,并给出了半导体激光器腔内相位随载流子浓度变化的关系。研究表明 ,被动锁模半导体激光器 (MLLDs)的总噪声主要由散粒噪声、自发辐射放大噪声、频率调制噪声和量子噪声组成 ,分别由光场的振幅、频率和载流子的相位噪声等所致的结果 The noise theory of the MQW laser with multiple quantum wells is systematically analyzed and the relationship between the phase of the semiconductor laser and the carrier concentration is given. The results show that the total noise of passive mode-locked semiconductor lasers (MLLDs) mainly consists of shot noise, amplified spontaneous emission noise, frequency modulation noise and quantum noise, which are determined by the amplitude of the light field, the frequency and phase noise of the carrier The result