Design Blueprint: A Hollow-Core Fibre Beam Delivery Line Sized by Critical Power, Mode Loss and Bend Radius

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24155255): This paper presents a computed design for a 5 m hollow-core anti-resonant fibre delivery line carrying millijoule femtosecond pulses from an amplifier to a processing head. 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 pulse peak power of 10 GW, a margin of 90 below the stated gas critical power for self-focusing, a total line loss of 0.9 dB including the bend allowance, a throughput of 0.69, and 1.38 mJ delivered from 2.00 mJ la 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.