We experimentally observed a Hong-Ou-Mandle dip with photon pairs generated in a periodically poled reverse-proton-exchange lithium niobate waveguide with an integrated mode demultiplexer at a wavelength of 1.5 um. The visibility of the dip in the experiment was 80% without subtraction of any noise terms at a peak pump power of 4.4 mW. The new technology developed in the experiment can find various applications in the research field of linear optics quantum computation in fiber or quantum optical coherence tomography with near infrared photon pairs.
@article{arxiv.0802.4441,
title = {Hong-Ou-Mandel dip using photon pairs from a PPLN waveguide},
author = {Qiang Zhang and Hiroki Takesue and Carsten Langrock and Xiuping Xie and M. M. Fejer and Yoshihisa Yamamoto},
journal= {arXiv preprint arXiv:0802.4441},
year = {2015}
}