Michelson laser interferometer-based vibration noise contribution measurement method for cold atom interferometry gravimeter
Zhang Ning1, 2, Hu Qingqing3, Wang Qian1, 2, Ji Qingchen1, 4, Zhao Weijing1, 2, Wei Rong1, ‡, Wang Yuzhu1
       

(a) The beat frequency characteristic of interference signal formed by dual-frequency interference, where A1,ω12 / A1,ω11 = 1.7, ΔL0 = 1.974 m. Insert: Fine interference pattern at the peak of beat signal envelope. The blue solid line and the red dotted line represent I4–3 and I1–2, respectively; (b) Phase error caused by single frequency approximation for the given vibration signal of ΔL(t) = 3.9× 10−5 sin (2π × 5t) with simulation time of 800 ms.