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Creators/Authors contains: "Yang, Peiyu"

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Generation of 14.0 W of single-frequency light at 770 nm by intracavity frequency doubling

https://doi.org/10.1364/OL.45.000339

Kwon, Minho ; Yang, Peiyu ; Huft, Preston ; Young, Christopher ; Ebert, Matthew ; Saffman, Mark ( January 2020 , Optics Letters)

We present a continuous, narrow-linewidth, tunable laser system that outputs up to 14.0 W at 770 nm. The light is generated by frequency doubling 18.8 W of light from a 1540 nm fiber amplifier that is seeded by a single-mode diode laser achieving $><#comment/> 74 %<#comment/>$ conversion efficiency. We utilize a lithium triborate crystal in an enhancement ring cavity. The low intensity noise and narrow linewidth of the 770 nm output are suitable for cold atom experiments.

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Preparation and control of neutral atom ensemble qubits using Rydberg interactions

Young, Christopher ; Kwon, Minho ; Yang, Peiyu ; Huft, Preston ; Radzom, Brandon ; Ebert, Matthew ; Walker, Thad ; Saffman, Mark ( May 2019 , DAMOP19 Meeting of The American Physical Society)

Ensemble qubits with strong coupling to photons and resilience against single atom loss are promising candidates for building quantum networks. We report on progress towards high fidelity preparation and control of ensemble qubits using Rydberg blockade. Our previous demonstration of ensemble qubit preparation at a fidelity <60% was possibly limited by Rydberg blockade leakage due to uncontrolled short range atom pair separation. We show progress towards ensembles with a blue-detuned 1-D lattice on top of the existing red-detuned dipole trap, which will suppress unwanted Rydberg interactions by imposing constraints on the atomic separation. We study the effect of lattice insertion on the fidelity of ensemble state preparation and Rydberg-mediated gates. Studies of cooperative scattering from a 1D atomic array will also be presented.
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