Future space telescope coronagraph instruments hinge on the integration of high-performance masks and precise wavefront sensing and control techniques to create dark holes essential for exoplanet detection. Recent advancements in wavefront control algorithms might exhibit differing performances depending on the coronagraph used. This research investigates three model-free and model-based algorithms in conjunction with either a vector vortex coronagraph or a scalar vortex coronagraph under identical laboratory conditions: pairwise probing with electric field conjugation, the self-coherent camera with electric field conjugation, and implicit electric field conjugation. We present experimental results in narrowband and broadband light from the In-Air Coronagraph Testbed at the Jet Propulsion Laboratory. We find that model-free dark hole digging methods achieve broadband contrasts comparable to model-based methods, and we highlight the calibration costs of model-free methods compared with model-based approaches. This study also reports the first time that electric field conjugation with the self-coherent camera has been applied for simultaneous multi-subband correction with a field stop. This study compares the advantages and disadvantages of each of these wavefront sensing and control algorithms with respect to their potential for future space telescopes.

中文翻译：

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电场共轭算法的比较实验室研究


未来的太空望远镜日冕仪仪器取决于高性能掩模和精确波前传感和控制技术的集成，以创建对于系外行星探测至关重要的黑洞。波前控制算法的最新进展可能会根据所使用的日冕仪表现出不同的性能。本研究在相同的实验室条件下研究了三种无模型和基于模型的算法，结合矢量涡旋日冕仪或标量涡旋日冕仪：电场共轭成对探测、电场共轭自相干相机和隐式电场共轭。我们展示了喷气推进实验室空中日冕仪测试台的窄带和宽带光实验结果。我们发现无模型黑洞挖掘方法实现了与基于模型的方法相当的宽带对比度，并且我们强调了与基于模型的方法相比无模型方法的校准成本。这项研究还首次报道了自相干相机的电场共轭被应用于带视场光阑的同时多子带校正。这项研究比较了这些波前传感和控制算法在未来太空望远镜中的潜力。