The gain switching characteristics and the effect of laser parameters on the output pulses of an InAs-InP (1 1 3)B quantum dot laser are investigated for the first time using theoretical models to obtain shorter pulses by applying an external optical beam to the laser excited state. The model is based on the rate equations, which are solved by the Runge –Kutta method. The results showed that without an optical beam, long pulse widths are obtained because of the ground state transition, and the change in the parameters strongly affects the laser output. However, with an optical beam illumination, short pulses with a width of 25–40 ps with a high peak power are generated owing to the excited state transition at low currents, and the change in the laser parameters does not affect the output pulses strongly. These results are important for long-distance optical transmissions as well as medical biotechnology.

增益切换特性和激光参数对 InAs-InP 输出脉冲的影响 (1  1 3) 首次使用理论模型研究了 B 量子点激光器，通过将外部光束施加到激光激发态来获得更短的脉冲。该模型基于速率方程，通过 Runge-Kutta 方法求解。结果表明，在没有光束的情况下，由于基态跃迁，获得了长脉冲宽度，并且参数的变化强烈影响了激光输出。然而，在光束照射下，由于低电流下的激发态跃迁，会产生宽度为 25-40 ps 的具有高峰值功率的短脉冲，并且激光器参数的变化不会强烈影响输出脉冲。这些结果对于长距离光传输以及医学生物技术都很重要。