A photonic integrated circuit (PIC) includes one or more couplers to interface a light source with the PIC, a splitter directly coupled to the one or more couplers at a coupling point of the PIC, a modulator to receive light from the couplers, and a connecting waveguide to connect the splitter to the modulator. The waveguide may be a rib waveguide. The PIC may be integrated with devices such as a CWDM or a PSM device, and may provide improved performance and lower attention for high optical power applications.