Difference between Direct modulation vs External modulation
Electronic bandwidth enhancement of directly modulated semiconductor lasers - ScienceDirect
Modulation Basics – Wavelength Electronics
Directly Modulated Laser (DML)
Optical simulation of direct and externally modulated laser diode spectra - Fiberguide
Directly modulated membrane lasers with 108 GHz bandwidth on a high-thermal-conductivity silicon carbide substrate | Nature Photonics
Photonics | Free Full-Text | Evaluation of Performance Enhancement of Optical Multi-Level Modulation Based on Direct Modulation of Optically Injection-Locked Semiconductor Lasers
World's fastest directly modulated laser exceeding 100-GHz bandwidth Membrane laser on silicon carbide substrate achieves low power consumption | Tokyo Tech News | Tokyo Institute of Technology
Measuring accurate surface profiles using a laser diode interferometer