Research On High-Frequency Modulation Characteristics Of High Power Semiconductor Laser

Since the semiconductor laser has the characteristics of direct modulation, making it an important devices in the field of optical communications. The response characteristics of the laser determine the merits of an optical communication system. Therefore, it is crucial to study the operating characteristics of the laser simulation and analyze the factors affecting the laser modulation characteristics.Based on the rate equation theory, this article analyzes the high-frequency modulation characteristics of the high-power quantum well semiconductor laser from transient response and modulation response.Focused on the influences to the modulation characteristics by electro-optic delay time, the relaxation oscillation frequency and chirp effect. On this basis, establish a quantum well laser transmission model by using transfer matrix method; analyze the influence of limiting layer width to transmission bandwidth and chirp effect.Finally, to study the high-frequency modulation characteristics of high-power quantum well lasers, carried out a detailed study and focusing on the modulation bandwidth and chirp characteristics.This research provides a theoretical basis to improve the high-frequency modulation characteristics of the laser and optimization of the device structure.