设计并优化更紧凑的硅基多波长量子点微环激光器阵列

multi-wavelength microring laser array made by InAs/GaAs quantum dot on silicon was optimized. A new method of changing the mode wavelength of the micro-ring laser is used, that is, the micro-ring laser is radially connected with a rectangular body. The mode wavelength of the micro-ring laser changes steadily from 1290 nm to 1307 nm. This approach offers better volume advantages(94.8% volume savings) and facilitates integration. It can cope with situations where space is limited, or where there is room for expansion in only one direction. The structural parameters of a laser which linked an external rectangle has been numerically optimized. The simulation outcomes reveal a substantial enhancement in optical modality of the microring laser, indicating optimized performance. A stable distributed fundamental mode can be achieved when the outer radius of a microring is set to 5 μm, the width of the microring is 2.4 μm, and the thickness of the cladding layer is 1.40 μm. A high quality factor about 1×105 is achieved by optimization. When the microring laser is changed shape, the mode wavelength range is 1290~1307 nm. Realisation of monolithic silicon integrated multi-wavelength laser arrays is feasible.