Coherent Multi‐Pulsing Induced by Engineered Heterogeneity in Diode Laser Arrays (Laser Photonics Rev. 20(12)/2026)

Frequency Heterogeneity Sparks Novel Dynamics in Coupled Laser Arrays The cover image illustrates coherent multi-pulsing in coupled semiconductor laser arrays caused by engineered frequency heterogeneity. The laser array splits into two predominantly antiphase synchronized clusters, enabling controllable pulse trains with different numbers of pulses per cavity roundtrip. The combined beam reveals coherent pulses, highlighting a scalable route toward high-power ultrafast photonic pulse generation and integrated laser-array technologies. See Research Article e01309 by Olivier Spitz and co-workers for more details. Image designed by Luis E. Maldonado-Castillo.