Non-classical interference between two telecom photons with wavelength conversion
Toshiki Kobayashi, Rikizo Ikuta, Hiroshi Kato, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masato Koashi, Masahide Sasaki, Zhen Wang, Nobuyuki Imoto · 2013
We converted the wavelength of two photons from visible to telecom range by a PPLN. The indistinguishability of two converted photons is observed by the HOM-interference visibility of 0.76±0.12, which surpasses the classical limit.