Stirling Scholes

Abstract Geomagnetic surveys provide insight into the subsurface for a range of applications, from fundamental understanding of geological processes, to mineral exploration and locating unexploded ordnance. A persistent challenge in performing such geomagnetic surveys is the joint problem of anthropogenic noise rejection and spatial aliasing, where the limited bandwidth (< 10 Hz) of traditional surveying instruments introduces artefacts into the surveyed field.

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Abstract Laser brightness is crucial in many optical processes, and is optimized by high power, high beam quality (low ${M^2}$) beams. Here we show how to improve the laser beam quality factor (reducing the ${M^2}$) of arbitrary structured light fields in a lossless manner using continuous phase-only elements, thus allowing for the increase in brightness by a simple linear optical transformation.