The detection and characterization of Earth-like exoplanets is one of the major science drivers for the next generation of telescopes. Current direct imaging instruments are limited by evolving non-common path aberrations (NCPAs). The NCPAs must be compensated for by using the science focal-plane image. A promising sensor is the self-coherent camera (SCC). An SCC modifies the Lyot stop in the coronagraph to introduce a probe electric field. However, the SCC has a weak probe electric field due to the requirements on the pinhole separation. A spectrally modulated self-coherent camera (SM-SCC) is proposed as a solution to the throughput problem. The SM-SCC uses a pinhole with a spectral filter and a dichroic beam splitter, which creates images with and without the probe electric field. This allows the pinhole to be placed closer to the pupil edge and increases the throughput. Combining the SM-SCC with an integral field unit (IFU) can be used to apply more complex modulation patterns to the pinhole and the Lyot stop. A modulation scheme with at least three spectral channels (e.g. IFU) can be used to change the pinhole to an arbitrary aperture with higher throughput. Numerical simulations show that the SM-SCC increases the pinhole throughput by a factor of 32, which increases the wavefront sensor sensitivity by a factor of 5.7. The SM-SCC reaches a contrast of $1\cdot10^{-9}$ for bright targets in closed-loop control with the presence of photon noise, phase errors, and amplitude errors. The contrast floor on fainter targets is photon-noise-limited and reaches $1\cdot10^{-7}$. For bright targets, the SM-SCC-IFU reaches a contrast of $3\cdot10^{-9}$ in closed-loop control with photon noise, amplitude errors, and phase errors. The SM-SCC is a promising focal-plane wavefront sensor for systems that use multiband observations, either through integral field spectroscopy or dual-band imaging.
Freezing the speckles: focal plane wavefront sensing with the spatially-clipped self-coherent camera
James C. Wyant College of Optical Sciences, University of Arizona（亚利桑那大学光学科学学院）；Steward Observatory, University of Arizona（亚利桑那大学斯图尔德天文台）；Leiden University, Leiden Observatory（莱顿大学莱登天文台）；Flatiron Center for Computational Astrophysics, Flatiron Institute（平顶山研究所计算天体物理中心）；Starfire Optical Range, Kirtland Air Force Base（基尔兰空军基地星光光学试验场）；Northrop Grumman（诺斯罗普·格鲁曼公司）
First Experimental Results of the Fast Atmospheric Self-coherent Camera Technique on the Santa cruz Extreme Adaptive optics Laboratory Testbed: Demonstration of High Speed Focal Plane Wavefront Control of Residual Atmospheric Speckles
Digging dark holes on-sky with the Self-Coherent Camera: Preliminary results
Leiden Observatory, Leiden University（莱顿天文台，莱顿大学）；Steward Observatory, The University of Arizona（斯图德天文台，亚利桑那大学）；Wyant College of Optical Sciences, The University of Arizona（怀雅特光学科学学院，亚利桑那大学）；Subaru Telescope, National Observatory of Japan, National Institutes of Natural Sciences（昴星团望远镜，日本国立天文台，日本自然科学研究院）；Astrobiology Center, National Institutes of Natural Sciences（天体生物学中心，日本自然科学研究院）；Northrop Grumman Corporation（诺斯罗普·格鲁曼公司）；Center for Computational Astrophysics, Flatiron Institute（计算天体物理学中心，富尔顿研究所）；Draper Laboratory（德拉珀实验室）；Starfire Optical Range, Kirtland Air Force Base（星光光学靶场，柯克兰空军基地）
The space coronagraph optical bench (SCoOB): 2. wavefront sensing and control in a vacuum-compatible coronagraph testbed for spaceborne high-contrast imaging technology
Experimentally-determined performance limits for joint imaging and wavefront sensing with a photonic lantern
University of California, Santa Cruz（加州大学圣克鲁兹分校）；Lawrence Livermore National Laboratory（劳伦斯利弗莫尔国家实验室）；Laboratoire d’Astrophysique de Marseille（马赛天体物理学实验室）；University of California, Los Angeles（加州大学洛杉矶分校）；The College of Optics & Photonics, University of Central Florida（中佛罗里达大学光学与光子学院）
