Low noise phase-locked laser system for atom interferometry

A low noise laser system for atom interferometry is realized with phase-locked fiber lasers, where the performance of OPLL greatly enhanced by FEOM feedback loop and narrow linewidths. The demonstrated contribute 2.2 mrad per shot to interferometer permit continuous long-term operation more than 115 hours without relocking in field test. Also, mobile gravimeter equipped this reaches a sensitivity as good 29 uGal/\sqrt{Hz} resolution 1.1 uGal within 1500 s, demonstrating performances comparable state art.