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Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry (2018)
Journal Article
Keaveney, J., Wrathmall, S. A., Adams, C. S., & Hughes, I. G. (2018). Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry. Optics Letters, 43(17), 4272-4275. https://doi.org/10.1364/ol.43.004272

Atomic bandpass filters are widely used in a variety of applications, owing to their high peak transmission and narrow bandwidths. Much of the previous literature has used the Faraday effect to realize these filters, where an axial magnetic field is... Read More about Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry.

Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen-Back regime (2018)
Journal Article
Mathew, R. S., Ponciano-Ojeda, F., Keaveney, J., Whiting, D., & Hughes, I. (2018). Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen-Back regime. Optics Letters, 43(17), 4204-4207. https://doi.org/10.1364/ol.43.004204

We demonstrate a technique to lock simultaneously two laser frequencies to each step of a two-photon transition in the presence of a magnetic field sufficiently large to gain access to the hyperfine Paschen–Back regime. A ladder configuration with th... Read More about Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen-Back regime.

Collective Lamb shift of a nanoscale atomic vapor layer within a sapphire cavity (2018)
Journal Article
Peyrot, T., Keaveney, J., Sortais, Y. R., Sargsyan, A., Sarkisyan, D., Hughes, I. G., …Adams, C. S. (2018). Collective Lamb shift of a nanoscale atomic vapor layer within a sapphire cavity. Physical Review Letters, 120(24), Article 243401. https://doi.org/10.1103/physrevlett.120.243401

We measure the near-resonant transmission of light through a dense medium of potassium vapor confined in a cell with nanometer thickness in order to investigate the origin and validity of the collective Lamb shift. A complete model including the mult... Read More about Collective Lamb shift of a nanoscale atomic vapor layer within a sapphire cavity.

Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements (2018)
Journal Article
Keaveney, J. (2018). Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements. Review of Scientific Instruments, 89(3), Article 035114. https://doi.org/10.1063/1.5022973

We present a simple and convenient, high-resolution solution for automated laser-beam profiling with axial translation. The device is based on a Raspberry Pi computer, Pi Noir CMOS camera, stepper motor, and commercial translation stage. We also prov... Read More about Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements.