Self-alignment of a large-area dual-atom-interferometer gyroscope using parameter-decoupled phase-seeking calibrations

We report a Mach-Zehnder-type dual-atom-interferometer gyroscope with an interrogation arm of 40-cm length and the interference area up to $1.2\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{2}$. The precise angular alignment large-scale separated Raman lasers is demonstrated by seeking phase intersection Ramsey-$\mathrm{Bord}\stackrel{\ifmmode \acute{}\else \'{}\fi{}}{\mathrm{e}}$ interferometers after gravity effect compensated decoupling velocity dependent cross-talk shifts, applied build Mach-Zehnder atom interferometer. Then compact inertial rotation sensor realized based on dual large-area precisely aligning lasers, in which coherence well preserved common noise differentially suppressed. presents sensitivity $1.5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$ $\mathrm{rad}/\mathrm{s}/{\mathrm{Hz}}^{1/2}$, stability $9.5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}\phantom{\rule{0.16em}{0ex}}\mathrm{rad}/\mathrm{s}$ at 23000 s. absolute measurement carried out adjusting atomic corresponds modulating scale factor.