A thorough study on genetic algorithms in feedback-based wavefront shaping

Wu, Daixuan; Luo, Jiawei; Li, Zhaohui; Shen, Yuecheng

doi:10.1142/s1793545819420045

Cited by 34 publications

(22 citation statements)

References 30 publications

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“…The feedback signals can be light intensity 13,14 , fluorescence 5,15,16 , photoacoustic signal 17,18 , etc. This method can adjust the incident wavefront with respect to the current status of the dynamic scattering medium and therefore has the potential to be applied in highly dynamic environments 12,19 .…”

Section: Introductionmentioning

confidence: 99%

“…To achieve high-enhancement light focusing within highly dynamic scattering media, high-speed iterative optimization and a large number of modulation modes are essential for the iterative WS method. On the one hand, a variety of iterative optimization algorithms have been proposed, including the continuous sequential optimization 20,21 , partitioning algorithm 13 , genetic algorithm (GA) 19,22 , particle swarm optimization 23 , Hadamard algorithm 24 , simulated annealing algorithm 25 , etc. Compared with the conventional transmission matrix methods that require an enumerate search, these methods [19][20][21][22][23][24][25] significantly accelerate the process of optimizing the incident wavefront, but the speed of optimization is still not high enough to deal with the high dynamic media.…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, a variety of iterative optimization algorithms have been proposed, including the continuous sequential optimization 20,21 , partitioning algorithm 13 , genetic algorithm (GA) 19,22 , particle swarm optimization 23 , Hadamard algorithm 24 , simulated annealing algorithm 25 , etc. Compared with the conventional transmission matrix methods that require an enumerate search, these methods [19][20][21][22][23][24][25] significantly accelerate the process of optimizing the incident wavefront, but the speed of optimization is still not high enough to deal with the high dynamic media. In addition, these methods involve stochastic variables in the optimization and are sensitive to the initial condition and local minima, which constrains the enhancement of the focus.…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Liu

et al. 2021

Light Sci Appl

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Speed 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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Yang

Liu

et al. 2021

Light Sci Appl

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“…In the past decade, optical wavefront shaping (WFS) has drawn lots of attention due to its unique ability to control light propagation through/inside complex media, which shows a great potential to revolutionize imaging and light manipulation in biological tissue. [1][2][3][4][5][6] Moreover, WFS has been demonstrated to mitigate the mode dispersion and coupling in multimode optical¯bers (MMF) by utilizing a spatial light modulator (SLM) to control the wavefront of incident light. 7,8 By scanning focus through a multimode¯ber directly or revising the transmission matrix, many types of MMF-based endoscopies have been proposed, [9][10][11] exhibiting quite a few advantages in brain imaging over¯ber bundle.…”

Section: Introductionmentioning

confidence: 99%

Active wavefront shaping for controlling and improving multimode fiber sensor

Zhong

et al. 2019

J. Innov. Opt. Health Sci.

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Wavefront shaping (WFS) techniques have been used as a powerful tool to control light propagation in complex media, including multimode fibers. In this paper, we propose a new application of WFS for multimode fiber-based sensors. The use of a single multimode fiber alone, without any special fabrication, as a sensor based on the light intensity variations is not an easy task. The twist effect on multimode fiber is used as an example herein. Experimental results show that light intensity through the multimode fiber shows no direct relationship with the twist angle, but the correlation coefficient (CC) of speckle patterns does. Moreover, if WFS is applied to transform the spatially seemingly random light pattern at the exit of the multimode fiber into an optical focus. The focal pattern correlation and intensity both can serve to gauge the twist angle, with doubled measurement range and allowance of using a fast point detector to provide the feedback. With further development, WFS may find potentials to facilitate the development of multimode fiber-based sensors in a variety of scenarios.

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“…3 Implementations for fast wavefront shaping 4 have also been summarized towards the goal of applications in dynamic scattering media and living biological tissues. Original studies presented in this issue span from the development of technology 5 and optimization algorithm 6,7 to applications for highresolution imaging 8-10 and¯ber sensing. 11 Overall, they represent a diverse set of works re°ecting a broad range, albeit not the full picture, of the state of the art and direction of the¯eld.…”

mentioning

confidence: 99%