Speaker
Description
We present an enhanced near‑infrared heterodyne interferometry testbed developed at the Max Planck Institute for Physics (MPP)
to complement ongoing advances in both direct‑detection and stellar intensity interferometry techniques. The upgraded setup incorporates
a new, narrow‑linewidth 1550 nm local-oscillator laser, with improved optical stability, and a programmable optical delay line that enables
controlled emulation of atmospheric path‑length fluctuations. Using this table-top setup, we investigate new strategies for mitigating
coherence loss induced by atmospheric phase noise, with an emphasis on methods applicable to long‑baseline astronomical interferometry.
We describe the upgraded system architecture, outline the disturbance‑suppression techniques under study, and present preliminary
results together with future plans of the experiment.
