Figure 5: Demonstration of coherence between the two ouputs.
From: Coherent and dynamic beam splitting based on light storage in cold atoms
(a) High visibility interference of 99.1% is observed between the two output beams in the experimental setup depicted Fig. 1. The phase difference between the two output beams can be controlled by changing the RF phase difference ϕ2 − ϕ1. Each data point is acquired by integrating the grey region of the output trace shown in the inset. The experiment is done at Δ = 0. (b) If the detuning Δ is non-zero for the BW control, the frequencies of the BW and FW outputs will differ, thereby causing beating between the two outputs. The solid line is the fitting curve with the oscillation period of 0.25 μs.
