Design Blueprint: An Optical Phased Array Beam Steerer Sized by Emitter Pitch, Grating Lobes and Aperture Beamwidth

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24155342): This paper presents a computed design for a silicon-photonic optical phased array of 1024 emitters steering a 1550 nm beam without moving parts. The sizing follows from applying the relevant intensity, thermal, nonlinear and geometric bounds at a single stated operating point, with every number produced by a deposited computation. The headline result is a total aperture of 128 micrometres, a grating-lobe-limited steering range of plus or minus 11 degrees, a beamwidth of 0.69 degrees, roughly 1037 resolvable spots across the two-dimensional field, and a worst-case phase-shifter dissipation of 2 Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.