SEMICONDUCTOR LASER, OPTICAL EMISSION COMPONENT, OPTICAL LINE TERMINAL AND OPTICAL NETWORK UNIT

摘要

Embodiments of this application provide a semiconductor laser, an optical transmitter component, an optical line terminal, and an optical network unit. The semiconductor laser includes a substrate, and a lower waveguide layer, a lower confining layer, a central layer, an upper confining layer, a grating layer, an upper waveguide layer and an electrode layer that are sequentially formed on the substrate. The upper confining layer, the central layer and the lower confining layer in a filtering region form a core layer of the filtering region. The grating layer in the filtering region includes a slanted grating. In this application, a modulation chirp and dispersion of a transmitted optical pulse can be reduced.