[20p-W541-1~16] 3.10 Optical quantum physics and technologies

▲ [20p-W541-3] Spectral correlation measurement in Hong-Ou-Mandel interference between two independent sources

〇Ruibo Jin¹, Thomas Gerrits², Mikio Fujiwara¹, Ryota Wakabayashi^1,3, Taro Yamashita¹, Shigehito Miki¹, Hirotaka Terai¹, Ryosuke Shimizu⁴, Masahiro Takeoka¹, Masahide Sasaki¹ (1.NICT, 2.NIST, 3.Waseda University, 4.UEC)

Keywords:Hong-Ou-Mandel interference,Independent sources,Spectral correlation measurement

Hong-Ou-Mandel (HOM) interference between independent photon sources (HOMI-IPS) is the fundamental block for quantum information processing. All the previous HOMI-IPS experiments were carried out in time-domain, however, the spectral information during the interference was omitted. Here, we investigate the HOMI-IPS in spectral domain using the recently developed fast fiber spectrometer, and demonstrate the spectral distribution during the HOM interference between two heralded single-photon sources, and two thermal sources. This experiment not only can deepen our understanding of HOMI-IPS from the viewpoint of spectral domain, but also presents a tool to test the theoretical predictions of HOMI-IPS using spectrally engineered sources. Figure 1 shows the experimental setup and Fig.2 shows the experimentally measured joint spectral distribution at different delay positions.