TY - JOUR AU - Ma, L AU - Shelton, R AU - Kapteyn, H AU - Murnane, M AU - Ye, Jun C2 - Physical Review Letters DA - 2021-10-12 15:10:21 LA - en PB - Physical Review Letters PY - 2021 TI - Sub-10-Femtosecond Active Synchronization Between Two Passively Mode-Locked Ti: Sapphire Oscillators ER -