A 40 W, 780 nm laser system with compensated dual beam splitters for atom interferometry

Abstract

We demonstrate a narrow-linewidth 780 nm laser system with up to 40 W power and a frequency modulation bandwidth of 230 MHz. Efficient overlap on nonlinear optical elements combines two pairs of phase-locked frequency components into a single beam. Serrodyne modulation with a high-quality sawtooth waveform is used to perform frequency shifts with > 96.5 % efficiency over tens of MHz. This system enables next-generation atom interferometry by delivering simultaneous, Stark-shift-compensated dual beam splitters while minimizing spontaneous emission.

arXiv comment4 pages, 3 figures

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• All-fiber, near-infrared, laser system at 780nm for atom cooling
• Watt-class injection-locked diode laser system at 399 nm for atomic physics
• Spectrally-pure optical serrodyne modulation for continuously-tunable laser offset locking