Hong-Ou-Mandel dip using photon pairs from a PPLN waveguide

摘要

We experimentally observed a Hong-Ou-Mandle dip with photon pairs generatedin a periodically poled reverse-proton-exchange lithium niobate waveguide withan integrated mode demultiplexer at a wavelength of 1.5 um. The visibility ofthe dip in the experiment was 80% without subtraction of any noise terms at apeak pump power of 4.4 mW. The new technology developed in the experiment canfind various applications in the research field of linear optics quantumcomputation in fiber or quantum optical coherence tomography with near infraredphoton pairs.