scholarly journals Controlling the Propagation of Light through a Scattering Medium by Spatio-Temporal Wavefront Shaping

2013 ◽  
Vol 41 (8) ◽  
pp. 613
Author(s):  
Kaoru OHTA
Keyword(s):  
Scattering Medium ◽  
Propagation Of Light ◽  
Wavefront Shaping ◽  
Spatio Temporal

scholarly journals Non-Invasive Imaging Through Scattering Medium by Using a Reverse Response Wavefront Shaping Technique

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Abhijit Sanjeev ◽  
Yuval Kapellner ◽  
Nadav Shabairou ◽  
Eran Gur ◽  
Moshe Sinvani ◽  
...  
Keyword(s):  
Scattering Medium ◽  
Non Invasive ◽  
Shaping Technique ◽  
Wavefront Shaping

scholarly journals Spatio-temporal focusing of an ultrafast pulse through a multiply scattering medium

2011 ◽  
Vol 2 (1) ◽  
Author(s):  
David J. McCabe ◽  
Ayhan Tajalli ◽  
Dane R. Austin ◽  
Pierre Bondareff ◽  
Ian A. Walmsley ◽  
...  
Keyword(s):  
Scattering Medium ◽  
Temporal Focusing ◽  
Spatio Temporal ◽  
Ultrafast Pulse

scholarly journals Anti-scattering light focusing by fast wavefront shaping based on multi-pixel encoded digital-micromirror device

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Jiamiao Yang ◽  
Qiaozhi He ◽  
Linxian Liu ◽  
Yuan Qu ◽  
Rongjun Shao ◽  
...  
Keyword(s):  
High Speed ◽  
Digital Micromirror Device ◽  
Noisy Environment ◽  
Scattering Medium ◽  
Light Modulator ◽  
Holographic Display ◽  
Speed Of Response ◽  
Wavefront Shaping ◽  
Scattering Light ◽  
Light Focusing

AbstractSpeed and enhancement are the two most important metrics for anti-scattering light focusing by wavefront shaping (WS), which requires a spatial light modulator with a large number of modulation modes and a fast speed of response. Among the commercial modulators, the digital-micromirror device (DMD) is the sole solution providing millions of modulation modes and a pattern rate higher than 20 kHz. Thus, it has the potential to accelerate the process of anti-scattering light focusing with a high enhancement. Nevertheless, modulating light in a binary mode by the DMD restricts both the speed and enhancement seriously. Here, we propose a multi-pixel encoded DMD-based WS method by combining multiple micromirrors into a single modulation unit to overcome the drawbacks of binary modulation. In addition, to efficiently optimize the wavefront, we adopted separable natural evolution strategies (SNES), which could carry out a global search against a noisy environment. Compared with the state-of-the-art DMD-based WS method, the proposed method increased the speed of optimization and enhancement of focus by a factor of 179 and 16, respectively. In our demonstration, we achieved 10 foci with homogeneous brightness at a high speed and formed W- and S-shape patterns against the scattering medium. The experimental results suggest that the proposed method will pave a new avenue for WS in the applications of biomedical imaging, photon therapy, optogenetics, dynamic holographic display, etc.

Propagation of light pulses in a scattering medium

1969 ◽  
Vol 12 (5) ◽  
pp. 554-559 ◽  
Author(s):  
B. V. Ermakov ◽  
Yu. A. Il'inskii
Keyword(s):  
Scattering Medium ◽  
Light Pulses ◽  
Propagation Of Light

Multi-wavelength Controllable Focusing through Scattering Medium Based on Feedback-based Wavefront Shaping

Optik ◽  
2021 ◽  
pp. 167321
Author(s):  
Xinyu Xu ◽  
Qi Feng ◽  
Fan Yang ◽  
Yingchun Ding ◽  
Zhaoyang Chen
Keyword(s):  
Scattering Medium ◽  
Multi Wavelength ◽  
Wavefront Shaping

scholarly journals Author Correction: Non-Invasive Imaging Through Scattering Medium by Using a Reverse Response Wavefront Shaping Technique

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Abhijit Sanjeev ◽  
Yuval Kapellner ◽  
Nadav Shabairou ◽  
Eran Gur ◽  
Moshe Sinvani ◽  
...  
Keyword(s):  
Scattering Medium ◽  
Non Invasive ◽  
Shaping Technique ◽  
Wavefront Shaping

scholarly journals Artificial intelligence-assisted light control and computational imaging through scattering media

2019 ◽  
Vol 12 (04) ◽  
pp. 1930006 ◽  
Author(s):  
Shengfu Cheng ◽  
Huanhao Li ◽  
Yunqi Luo ◽  
Yuanjin Zheng ◽  
Puxiang Lai
Keyword(s):  
Artificial Intelligence ◽  
Phase Conjugation ◽  
Computational Imaging ◽  
Scattering Medium ◽  
Scattering Media ◽  
Neuron Network ◽  
Modal Dispersion ◽  
Speckle Patterns ◽  
Wavefront Shaping ◽  
Strong Scattering

Coherent optical control within or through scattering media via wavefront shaping has seen broad applications since its invention around 2007. Wavefront shaping is aimed at overcoming the strong scattering, featured by random interference, namely speckle patterns. This randomness occurs due to the refractive index inhomogeneity in complex media like biological tissue or the modal dispersion in multimode fiber, yet this randomness is actually deterministic and potentially can be time reversal or precompensated. Various wavefront shaping approaches, such as optical phase conjugation, iterative optimization, and transmission matrix measurement, have been developed to generate tight and intense optical delivery or high-resolution image of an optical object behind or within a scattering medium. The performance of these modulations, however, is far from satisfaction. Most recently, artificial intelligence has brought new inspirations to this field, providing exciting hopes to tackle the challenges by mapping the input and output optical patterns and building a neuron network that inherently links them. In this paper, we survey the developments to date on this topic and briefly discuss our views on how to harness machine learning (deep learning in particular) for further advancements in the field.

scholarly journals Optical information transmission through complex scattering media with optical-channel-based intensity streaming

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Haowen Ruan ◽  
Jian Xu ◽  
Changhuei Yang
Keyword(s):  
Phase Conjugation ◽  
Standard Technique ◽  
Image Transmission ◽  
Optical Channel ◽  
Scattering Medium ◽  
Scattering Media ◽  
The Past ◽  
Wavefront Shaping ◽  
Control Light ◽  
Optical Paths

AbstractFor the past decade, optical wavefront shaping has been the standard technique to control light through scattering media. Implicit in this dominance is the assumption that manipulating optical interference is a necessity for optical control through scattering media. In this paper, we challenge this assumption by reporting on an alternate approach for light control through a disordered scattering medium – optical-channel-based intensity streaming (OCIS). Instead of actively tuning the interference between the optical paths via wavefront shaping, OCIS controls light and transmits information through scattering media through linear intensity operations. We demonstrate a set of OCIS experiments that connect to some wavefront shaping implementations, i.e. iterative wavefront optimization, digital optical phase conjugation, image transmission through transmission matrix, and direct imaging through scattering media. We experimentally created focus patterns through scattering media on a sub-millisecond timescale. We also demonstrate that OCIS enables a scattering medium mediated secure optical communication application.

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