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考虑限制层内的载流子，对两种激射波长相同的匹配单量子阱激光器的载流子溢出和增益特性进行了分析。限制层在提供光学限制的同时，对载流子（主要是导带电子）分布也有影响。阱宽一定时，对光学限制因子存在最优限制层厚度；而随着限制层厚度的增加，注入到量子阱内的载流子比例减小。小阱宽的量子阱虽然光学限制因子和载流子注入比例都较小，但由于其价带耦合小于宽量子阱，从而具有高的模式增益，说明量子阱的能带结构对其光学特性有决定性的作用。采用其它减小价带耦合的方法，如在阱区引入应变，可进一步提高激光器的性能。
Considering the carriers in the confinement layer, carrier overflow and gain characteristics of two matched single-quantum-well lasers with the same lasing wavelength are analyzed. The confinement layer, while providing optical confinement, also has an effect on the distribution of carriers (mainly conduction band electrons). When the well width is constant, there is an optimal confinement layer thickness for the optical confinement factor. With the increase of the confinement layer thickness, the proportion of carriers injected into the quantum well decreases. Although the optical confinement factor and carrier injection ratio are both small, the quantum well with small well width has a high mode gain due to its valence band coupling is smaller than that of a wide quantum well, indicating that the energy band structure of the quantum well has optical properties Decisive role. Other methods of reducing the valence band coupling, such as the introduction of strain in the well region, can further improve the performance of the laser.