3 papers
astro-ph.IM2026
Demonstration of a Single-Laser-Diode-Pumped Ti:Sapphire Astrocomb on the Southern African Large Telescope
Ewan Allan, Yuk Shan Cheng, Kamalesh Dadi +13
Astrocombs -- broadband lasers comprising thousands of narrow, uniformly spaced and atomically-referenced spectral lines -- offer gold-standard wavelength calibration for ground-ba…
physics.optics2026
Visible octave frequency combs in silicon nitride nanophotonic waveguides driven by Ti:sapphire lasers
Abdullah Alabbadi, Ewan Allan, Hanna Ostapenko +3
Nonlinear nanophotonic waveguides have opened a route to compact frequency combs for precision metrology, spectroscopy and astronomy, yet broadband comb access to the visible remai…
physics.ins-det2017
Z-scan confocal method for indirect focusing location
P. Castro-Marín, G. Castro-Olvera, C. Ruíz +3
We present a new technique that we have defined as the z-scan confocal method to determine the absolute location and size of the focal spot in a tight focused ultrashort laser puls…