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Concept validation of a high dynamic range point-diffraction interferometer for wavefront sensing in adaptive optics (2022)
Journal Article

The direct detection and imaging of exoplanets requires the use of high-contrast adaptive optics (AO). In these systems quasi-static aberrations need to be highly corrected and calibrated. To achieve this, the pupil-modulated point-diffraction interf... Read More about Concept validation of a high dynamic range point-diffraction interferometer for wavefront sensing in adaptive optics.

First stellar photons for an integrated optics discrete beam combiner at the William Herschel Telescope (2021)
Journal Article

We present the first on-sky results of a four-telescope integrated optics discrete beam combiner (DBC) tested at the 4.2 m William Herschel Telescope. The device consists of a four-input pupil remapper followed by a DBC and a 23-output reformatter. T... Read More about First stellar photons for an integrated optics discrete beam combiner at the William Herschel Telescope.

Global tip-tilt and high-order aberration correction with plenoptic wavefront sensors in closed-loop AO systems (2021)
Journal Article

The plenoptic wavefront sensor (PlWFS) has been proposed as being suitable for operating on extended objects in adaptive optics (AO) systems. We propose a new self-referencing method that uses the cell image of PlWFS as a correlation reference and en... Read More about Global tip-tilt and high-order aberration correction with plenoptic wavefront sensors in closed-loop AO systems.

Laboratory demonstration of an alternative laser guide stars wavefront sensing technique—projected pupil plane pattern (2019)
Journal Article

Adaptive optics (AO) is widely used in optical/near-infrared telescopes to remove the effects of atmospheric distortion, and laser guide stars (LGSs) are commonly used to ease the requirement for a bright, natural reference source close to the scient... Read More about Laboratory demonstration of an alternative laser guide stars wavefront sensing technique—projected pupil plane pattern.

Calibration of quasi-static aberrations in high-contrast astronomical adaptive optics with a pupil-modulated point-diffraction interferometer (2018)
Journal Article

The direct detection and imaging of exoplanets requires the use of high-contrast adaptive optics (AO). In these systems quasi-static aberrations need to be highly corrected and calibrated. In order to achieve this, a high-sensitivity wavefront sensor... Read More about Calibration of quasi-static aberrations in high-contrast astronomical adaptive optics with a pupil-modulated point-diffraction interferometer.