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A single-seed, module-based compact laser system is demonstrated on atransportable $^{87}\text{Rb}$-based high-precision atomic gravimeter. All therequired laser frequencies for the atom interferometry are provided byfree-space acousto-optic modulators (AOMs) and resonant electro-optic phasemodulators (EOMs). The optical phase-locked loop between the two optical pathsderived from the same laser provides an easy frequency manipulation between twolaser frequencies separated by the hyperfine frequency of 6.835 GHz using anAOM and an EOM, respectively. Our scheme avoids parasite Raman transitionspresent in the direct EOM modulation scheme (modulating directly at thefrequency of the hyperfine splitting), which have detrimental effects on theaccuracy of the gravity measurements. The optical phase-locked loop alsoprovides a convenient way for vibration compensation through the Raman lasers'phase offset. Furthermore, the modular design approach allows plug-and-playnature on each individual optic module and also increases the mechanicalstability of the optical systems. We demonstrate high-precision gravitymeasurements with 17.8 $\mu\text{Gal}$ stability over 250 seconds averagingtime and 2.5 $\mu\text{Gal}$ stability over 2 h averaging time.

Compact single-seed, module-based laser system on a transportable high-precision atomic gravimeter