Low-coherence interferometry with undetected mid-infrared photons in the high-gain regime

Giovanni Zotti, Dmitri B. Horoshko, Mikhail I. Kolobov +4

We develop a high-parametric-gain SU(1,1) interferometer based on an aperiodically poled Potassium Titanyl Phosphate (apKTP) crystal, enabling frequency-domain low-coherence interf…