Abstract
<jats:p>The information capacity at terahertz (THz) frequencies is constrained not by carrier bandwidth but by the dimensionality and per-dimension resolution accessible for modulation. Conventional pulse encoding operates locally, processing each pulse independently within a fixed-dimensional space. Here we introduce global pulse-domain encoding, a paradigm that encodes information in the complete temporal structure of a pulse sequence, specifically, in the relational pattern of pulse intervals. Linking pulses through intervals simultaneously introduces encoding dimensions that scale with pulse count N and decouples per-dimension resolution from pulse-width constraints. We implement this scheme using programmable femtosecond pulse shaping combined with nonlinear THz generation in lithium niobate, demonstrating scalable encoding and achieving a 23-fold increase in symbol capacity over conventional methods. This work transforms signal-space dimensionality and per-dimension resolution into scalable design parameters, opening a route toward terabit-per-second THz interconnects.</jats:p>