Results 31 to 40 of about 13,728 (209)

Laboratory testing of components and systems used for advanced wavefront control [PDF]

, 2022
S.301 ...
Kohnle, A., Wendelstein, N., Weiss, R., Giles, M.K.   +3 more
core   +1 more source

MEMS Deformable Mirrors for Space-Based High-Contrast Imaging

Micromachines, 2019
Micro-Electro-Mechanical Systems (MEMS) Deformable Mirrors (DMs) enable precise wavefront control for optical systems. This technology can be used to meet the extreme wavefront control requirements for high contrast imaging of exoplanets with coronagraph
Rachel E. Morgan, Ewan S. Douglas, Gregory W. Allan, Paul Bierden, Supriya Chakrabarti, Timothy Cook, Mark Egan, Gabor Furesz, Jennifer N. Gubner, Tyler D. Groff, Christian A. Haughwout, Bobby G. Holden, Christopher B. Mendillo, Mireille Ouellet, Paula do Vale Pereira, Abigail J. Stein, Simon Thibault, Xingtao Wu, Yeyuan Xin, Kerri L. Cahoy   +19 more
doaj   +1 more source

Wavefront Control of 2D Curved Coding Metasurfaces Based on Extended Array Theory

IEEE Access, 2019
We extend the array theory to design 2D curved coding metasurfaces in order to achieve arbitrary wavefront control. The extended array theory establishes the relationship between wavefront and curved-surface, which provides a simple and effective method ...
Yang Zhou, Jianliang Xie, Haiyan Chen, Li Zhang, Yao Yan, Fengxia Li, Linbo Zhang, Peiheng Zhou, Longjiang Deng   +8 more
doaj   +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

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

Coupling Plasmonic System for Efficient Wavefront Control

ACS Applied Materials & Interfaces, 2021
Efficient and flexible manipulation of electromagnetic waves using metasurfaces has attracted continuous attention in recent years. However, previous studies mainly apply sole resonance effect to accomplish the task. Here, we show that introducing a meta-coupling effect would reveal further physical insights in the electromagnetic wave control.
Li Niu, Quan Xu, Xueqian Zhang, Ziying Zhang, Shaoxian Li, Xieyu Chen, Yuehong Xu, Jiajun Ma, Ming Kang, Jiaguang Han, Weili Zhang   +10 more
openaire   +3 more sources

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

A clock and wavefront mechanism for somite formation [PDF]

, 2006
Somitogenesis, the sequential formation of a periodic pattern along the antero-posterior axis of vertebrate embryos, is one of the most obvious examples of the segmental patterning processes that take place during embryogenesis and also one of the major ...
Maini, P. K., Baker, RE, Baker, Ruth E., Maini, Philip, Maini, PK, Schnell, S, Schnell, S., Baker, R.E., Maini, P.K.   +8 more
core   +2 more sources

Active nonlocal metasurfaces

Nanophotonics, 2020
Actively tunable and reconfigurable wavefront shaping by optical metasurfaces poses a significant technical challenge often requiring unconventional materials engineering and nanofabrication.
Malek Stephanie C., Overvig Adam C., Shrestha Sajan, Yu Nanfang   +3 more
doaj   +1 more source

Simulation-based design optimization of the holographic wavefront sensor in closed-loop adaptive optics

Light: Advanced Manufacturing, 2022
Adaptive optics systems are used to compensate for wavefront distortions introduced by atmospheric turbulence. The distortions are corrected by an adaptable device, normally a deformable mirror.
Andreas Zepp, Szymon Gladysz, Karin Stein, Wolfgang Osten   +3 more
doaj   +1 more source