Abstract
We use a chaotic laser, instead of thermal light, as the light source in temporal ghost imaging. This laser is generated by employing an external optical feedback. The imaging magnification is varied by adjusting the group-delay dispersion parameters of the fibers. The temporal ghost imaging result is the convolution between the transmission function of the object and the temporal correlation functions of the chaotic laser. The simulation experiment, which uses a controllable time switch as the object, shows the effectiveness of our scheme. This scheme could find applications in the time-domain tomography of pulses.
Highlights
Ghost imaging is a type of correlation imaging that utilizes the spatial or temporal correlation of incoherent light
Equation (17) shows that final imaging result Γðt[1]; t2Þ is the convolution between the original image, mðt1∕sÞ, and the temporal correlation function of the chaotic laser, Γ1ðt1Þ
We have investigated the temporal correlation characteristics of a chaotic laser and found that its correlation time is very short
Summary
Ghost imaging is a type of correlation imaging that utilizes the spatial or temporal correlation of incoherent light. The temporal ghost diffraction phenomena were reported when entangled two-photon pairs were employed as the light source.[14] In 2008, Torres-Company et al presented a ghost interference experiment with classical partially coherent light pulses.[15] Their results are similar to those obtained by two-photon temporal entanglement. In their setup, a white-noise source was split into two different arms, and a temporal modulator was placed in only one arm.
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