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◆ Optics Letters2026-01-09· Optics

Rapidly tunable ultrabroadband flying focus using adaptive optics and an axiparabola

Hunter Markland, Joanna Rosenbluth, Robert Boni, M. V. Ambat, C. Dorrer, John Palastro, D. H. Froula, J. J. Pigeon

原始摘要(英文原文)· Original abstract
A programmable ultrabroadband flying focus was produced using adaptive optics and an axiparabola with a continuous wave superluminescent diode. A deformable mirror and spatial light modulator were used to add a programmable amount of radial group delay, and an axiparabola was used to create an extended focus by imparting spherical aberration. Three different flying focus trajectories were measured using spectral interferometry, two with uniform velocity and one with an accelerating velocity. The temporal response function width of the flying focus optics alone was calculated to be 52 ± 6 fs, and the focal spot size was measured to be (1.2 ± 0.1) × larger than the diffraction-limited spot size through the extended focus.
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