Second-order interference of two independent and tunable single-mode continuous-wave lasers
Jianbin Liu, Dong Wei, Hui Chen, Yu Zhou, Huaibin Zheng, Hong Gao, Fu-Li Li, Zhuo Xu · Chinese Physics B · 2016
The second-order temporal interference of two independent single-mode continuous-wave lasers is discussed by employing two-photon interference in Feynman's path integral theory. It is concluded that whether the second-order temporal interference pattern can or cannot be retrieved via two-photon coincidence counting rate is dependent on the resolution time of the detection system and the frequency difference between these two lasers. Two identical and tunable single-mode continuous-wave diode lasers are employed to verify the predictions. These studies are helpful to understand the physics of two-photon interference with photons of different spectra.