Carrier-Suppressed Multiple Single-Sideband Laser Source for Atom Cooling and Interferometry

Abstract

We present a new electro-optic modulation technique that enables a single laser diode to realize a cold-atom source and a quantum inertial sensor based on matter-wave interferometry. Using carrier-suppressed dual single-sideband modulation, an IQ modulator generates two optical sidebands from separate radio-frequency (rf) signals. These sidebands are controlled independently in frequency, phase, and power using standard rf components. Our laser source exhibits improved rejection of parasitic sidebands compared to those based on phase modulators, which generate large systematic shifts in atom interferometers. We measure the influence of residual laser lines on an atom-interferometric gravimeter and show agreement with a theoretical model. We estimate a reduction of the systematic shift by two orders of magnitude compared to previous architectures, and reach a long-term sensitivity of 15 ng on the gravitational acceleration with an interrogation time of only T = 20 ms. Finally, we characterize the performance of our integrated laser system, and show that it is suitable for mobile sensing applications including gravity surveys and inertial navigation.

14 pages, 11 figures

References in corpus (11)

• Atom Interferometers
• Measurement of the fine-structure constant as a test of the Standard Model
• Limits to the sensitivity of a low noise compact atomic gravimeter
• Dual Matter-Wave Inertial Sensors in Weightlessness
• Absolute airborne gravimetry with a cold atom sensor
• The Feasibility of a Fully Miniaturized Magneto-Optical Trap for Portable Ultracold Quantum Technology
• Off-resonant Raman transitions impact in an atom interferometer
• Narrow linewidth single laser source system for onboard atom interferometry
• A compact micro-wave synthesizer for transportable cold-atom interferometers
• A phase-locked laser system based on modulation technique for atom interferometry
• Raman transitions driven by phase-modulated light in a cavity atom interferometer

Cited by in corpus (6)

• High-Performance Silicon Photonic Single-Sideband Modulators for Cold Atom Interferometry
• Testing the Universality of Free Fall using correlated ${}^{39}$K -- ${}^{87}$Rb interferometers
• Analog Stabilization of an Electro-Optic I/Q Modulator with an Auxiliary Modulation Tone
• Digital stabilization of an IQ modulator in the carrier suppressed single side-band (CS-SSB) mode for atom interferometry
• Tensor gravity gradiometry with a single-axis atom gradiometer
• Standalone optical frequency-offset locking electronics for atomic physics