Results 31 to 40 of about 9,355,325 (300)

Various Wavefront Sensing and Control Developments on the Santa Cruz Extreme AO Laboratory (SEAL) Testbed

, 2022
Ground-based high contrast imaging (HCI) and extreme adaptive optics (AO) technologies have advanced to the point of enabling direct detections of gas-giant exoplanets orbiting beyond the snow lines around nearby young star systems.
Jensen-Clem, Rebecca, Cetre, Sylvain, Amata, Hadi, Gerard, Benjamin L., Fu, Qiang, Perez-Soto, Javier, Dillon, Daren, Heidrich, Wolfgang, Chambouleyron, Vincent, van Kooten, Maaike A. M.   +9 more
core   +1 more source

Reinforcement Learning Environment for Wavefront Sensorless Adaptive Optics in Single-Mode Fiber Coupled Optical Satellite Communications Downlinks

Photonics, 2023
Optical satellite communications (OSC) downlinks can support much higher bandwidths than radio-frequency channels. However, atmospheric turbulence degrades the optical beam wavefront, leading to reduced data transfer rates.
Payam Parvizi, Runnan Zou, Colin Bellinger, Ross Cheriton, Davide Spinello   +4 more
doaj   +1 more source

Chamanzar/WAVEFRONT: WAVEFRONT

, 2023
<p>The repository includes code and software related to the paper entitled Chamanzar, Elmer, Shutter, Hartings and Grover (2023).</p> <p>Presence of spreading depolarizations is known to indicate worsening brain injuries.
Chamanzar
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Performance prediction and procurement in practice : assessing the suitability of commodity cluster components for wavefront codes [PDF]

, 2009
The cost of state-of-the-art supercomputing resources makes each individual purchase a length and expensive process. Often each candidate architecture will need to be benchmarked using a variety of tools to assess likely performance.
Mills, A. B., Jarvis, S. A.; id_orcid, Herdman, J. A., Mudalige, Gihan R., Vadgama, A., Davis, J. A., Holt, J., Jarvis, Stephen A., Smith, J. A., Hammond, Simon D., Hammond, S. D., Miller, I., Mudalige, G. R.   +12 more
core   +1 more source

Coherent Raman Generation Controlled by Wavefront Shaping [PDF]

Scientific Reports, 2019
AbstractWe investigate the possibility of tailoring coherent Raman generated spectra via adaptive wavefront optimization. Our technique combines a spatial light modulator and a spectrometer providing a feedback loop. The algorithm is capable of controlling the Raman generation, producing broader spectra and an improved overall efficiency, and ...
Shutova, Mariia, Shutov, Anton D., Zhdanova, Alexandra A., Thompson, Jonathan V., Sokolov, Alexei V.   +4 more
openaire   +2 more sources

Compensation of phase nonlinearity of liquid crystal spatial light modulator for high-resolution wavefront correction [PDF]

Journal of the European Optical Society-Rapid Publications, 2015
The ability of phase modulation enables liquid crystal spatial light modulator (LCSLM) to control wavefront. However, the disadvantage of its inherent nonlinear phase response will decrease the wavefront control accuracy.
Zhang H., Zhou H., Li J., Qiao Y. J., Si J., Gao W.   +5 more
doaj   +1 more source

A High-Frequency Wavefront Aberration Correction Method Based on Slope Fitting Prediction

IEEE Photonics Journal
A high-frequency wavefront aberration correction method based on slope fitting prediction is proposed to overcome bandwidth limitations caused by time delays.
Lingxi Kong, Yong Cheng, Bang Zhao, Kangjian Yang, Wang Zhao, Chunlin Guan, Shuai Wang, Ping Yang   +7 more
doaj   +1 more source

Sparse wavefront control: A new approach to high-contrast imaging

, 2018
Current high-contrast imaging systems implement wavefront control using traditional deformable mirrors developed for atmospheric turbulence correction, which require large strokes, high-speed, and continuous phase correction.
Belikov, Ruslan, Sirbu, Dan, Henze, Chris, Milster, Thomas, Finan, Emily, Pluzhnik, Eugene, Bendek, Eduardo A.   +6 more
core   +1 more source

Tests on micro-mirror arrays for adaptive optics

, 2022
S.319-329Micro Mirror Arrays (MMAs) offer a high speed and high resolution technology for wavefront control applications. In this paper a new MMA type is investigated.
Liesener, J., Lakner, H., Schenk, H., Gehner, A., Hupfer, W., Wallace, K.   +5 more
core   +1 more source

Performance Comparison of Wavefront-Sensorless Adaptive Optics Systems by Using of the Focal Plane

International Journal of Optics, 2015
The correction capability and the convergence speed of the wavefront-sensorless adaptive optics (AO) system are compared based on two different system control algorithms, which both use the information of focal plane.
Huizhen Yang, Zhen Zhang, Jian Wu
doaj   +1 more source