Observation of two-photon coalescence in weak coherent wave packets
M. F. Z. Arruda, Moslem Mahdavifar, Thomas Krop, P. H. Souto Ribeiro, Seyed Mohammad Hashemi Rafsanjani · Journal of the Optical Society of America B · 2020
We present an experimental investigation of two-photon interference using a continuous-wave laser. Using a Mach–Zehnder interferometer, we observe two-photon coalescence and its complementary effect, Hong–Ou–Mandel interference. We also demonstrate two-photon coalescence using a Michelson interferometer. Our work paves the way for the realization of multi-photon interference in high photon loss scenarios using continuous-wave lasers.