This project aims for the development of telecom-wavelength (1.55 µm) Photonic-Crystal Surface-Emitting Lasers (PCSELs) with double-photonic crystal mode guiding to allow small lateral dimension suitable for power-efficiency and high modulation speed. These Si-InP hybrid PCSELs are inherent singlemode emitters with an output power that scales with surface area. Here we aim for 10-µm device diameters with 10-mW chip-level output power over a large temperature range of 0-70°C and a 3 dB modulation bandwidth on pair with or better than conventional vertical-cavity surface-emitting lasers, i.e. in excess of 30 GHz. The devices are fabricated using a CMOS-compatible transfer printing process, allowing for low-cost wafer-scale fabrication and testing. In addition, we also study higher-power/lower bitrate PCSELs for frequency-modulated continuous-wave (FMCW) LiDAR applications.