23 citations · 36 across the 10 of their papers we have counts for
10 papers · 1 filter
Performance Comparison of the Nonlinear Curvature and Shack-Hartmann Wavefront Sensors in Strong Turbulence
Sam J. Potier, Arlene J. Aleman, Justin R. Crepp +1
Strong turbulence induces spatial variations in beam intensity that hinder the reconstruction process of many commonly deployed adaptive optics (AO) systems that use gradient-based…
Laboratory characterization of iLocater
Marcelo Tala Pinto, Marshall C. Johnson, Julia Brady +18
iLocater is a diffraction-limited, fiber-fed spectrograph designed for the Large Binocular Telescope (LBT), which targets high-precision radial velocity measurements in the near-in…
Commissioning and on-sky performance verification of iLocater
Marshall C. Johnson, Marcelo Tala Pinto, Jonathan Crass +59
iLocater is a high-resolution near-infrared extreme precision radial velocity (EPRV) spectrograph that was deployed to the Large Binocular Telescope (LBT) in June 2026. iLocater op…
The Calibration System of the iLocater Spectrograph
Sai Vidyud Senthil Nathan, Jonathan Crass, Julia E. Brady +21
iLocater is a new near-infrared, extreme precision radial velocity (EPRV) instrument delivered to the Large Binocular Telescope in the summer of 2026. The instrument utilizes singl…
Centroiding and Extraction of Tip/Tilt Information from Nonlinear Curvature Wavefront Sensor Measurements
Caleb A. Abbott, Justin R. Crepp, Stanimir O. Letchev +1
The nonlinear curvature wavefront sensor (nlCWFS) uses multiple (typically four) out-of-focus images to reconstruct the phase and amplitude of a propagating light beam. Because the…
Performance of the Nonlinear Curvature Wavefront Sensor as a Function of Scintillation Strength
Stanimir Letchev, Justin R. Crepp, Caleb G. Abbott +3
Local amplitude aberrations caused by scintillation can impact the reconstruction process of a wavefront sensor (WFS) by inducing a spatially non-uniform intensity at the pupil pla…
Developing an Error Budget for the Nonlinear Curvature Wavefront Sensor
Sam Potier, Justin Crepp, Stanimir Letchev
Consistent operation of adaptive optics (AO) systems requires the use of a wavefront sensor (WFS) with high sensitivity and low noise. The nonlinear curvature WFS (nlCWFS) has been…
Assessing Phase Reconstruction Accuracy for Different Nonlinear Curvature Wavefront Sensor Configurations
Stanimir Letchev, Jonathan Crass, Justin R. Crepp
The nonlinear curvature wavefront sensor (nlCWFS) offers improved sensitivity for adaptive optics (AO) systems compared to existing wavefront sensors, such as the Shack-Hartmann. T…
Spatial frequency response and sensitivity of the nonlinear curvature wavefront sensor
Stanimir Letchev, Jonathan Crass, Justin R. Crepp +1
The nonlinear curvature wavefront sensor (nlCWFS) has been shown to be a promising alternative to existing wavefront sensor designs. Theoretical studies indicate that the inherent…
Measuring Phase Errors in the Presence of Scintillation
Justin R. Crepp, Stanimir O. Letchev, Sam J. Potier +2
Strong turbulence conditions create amplitude aberrations through the effects of near-field diffraction. When integrated over long optical path lengths, amplitude aberrations (seen…