Wide-tuning narrow-linewidth semiconductor laser

The invention provides a wide-tuning narrow-linewidth semiconductor laser, and the laser is characterized in that the laser comprises an optical gain module which is used for providing a tunable optical wave; the optical coupling module is used for coupling the optical waves; and the outer cavity resonance module is used for adjusting the coupled light waves to obtain narrow-linewidth output light. According to the wide-tuning narrow-linewidth semiconductor laser, the tuning function is achieved through the Fano resonance between the micro-ring resonators and the U-shaped waveguide and the vernier caliper effect between the micro-ring resonators, the Mach-Zehnder interferometer is used for restraining side modes in the transmitted spectrum of the micro-ring resonators, and the wavelength selectivity is improved. Line width narrowing, frequency stabilization and rapid tuning of a wide spectrum range of output laser are realized. 本发明提供一种宽调谐窄线宽半导体激光器，其特征在于，包括：光增益模块，用于提供可调谐光波；光耦合模块，用于对所述光波进行耦合；外腔谐振模块，用于对所述耦合后的光波进