Real-time resilient focusing through a bending multimode fiber

Caravaca-Aguirre, Antonio M.; Niv, Eyal; Conkey, Donald B.; Piestun, Rafael

doi:10.1364/oe.21.012881

Cited by 181 publications

(128 citation statements)

References 28 publications

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“…We may also define a different optimization parameter that depends on both the coupling efficiency and the correlation with the desired mode patterns. Given the fact that the algorithm described here has been widely used for optical focusing through diffusive media [19][20][21][22][23][24][25][26][27], where optical power is a critical factor, the issue of coupling efficiency should not become a major hurdle for our AO-based approach.…”

Section: Discussionmentioning

confidence: 99%

“…However, the overall framework of the AObased approach should still apply. Again, this expectation is based on the successful demonstration of AO-based focusing [19][20][21][22][23][24][25][26][27], which involves hundreds, if not tens of thousands independent scattering channels.…”

Section: Discussionmentioning

confidence: 99%

“…In future, we expect the faster algorithms and methods described in [21,22,[24][25][26][27] should significantly improve the speed of selective mode excitation.…”

Section: Ao-based Mode Controlmentioning

confidence: 99%

“…Conceptually, the aforementioned AO-based approach is similar to those used in scattering medium focusing [19][20][21][22][23][24][25][26][27], imaging [28][29][30][31], or particle manipulation [32]. The main difference is that we are primarily interested in achieving highly selective excitation of LP modes for communication and sensing purposes, i.e., optical "focusing" in modal domain.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive control of waveguide modes in a two-mode-fiber

Lü¹,

Shipton²,

Wang³

et al. 2014

Opt. Express

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We experimentally demonstrate an adaptive-optics-based approach that allows selective excitation of waveguide modes and their mixtures in a two-mode fiber (TMF). A phase-only spatial light modulator is used for wavefront control, using feedback signals provided by the correlation between the experimentally measured field distribution and the desired mode profiles. Experimental results show the optical field within the TMF can be shaped to be pure linearly polarized (LP) modes or their combinations. Analysis shows selective mode excitation can be achieved using only 5 × 5 independent phase blocks. With proper feedback signals, this method should enable one to precisely control the optical field within any multimode fiber or other types of waveguides in real time.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…In future, we expect the faster algorithms and methods described in [21,22,[24][25][26][27] should significantly improve the speed of selective mode excitation.…”

Section: Ao-based Mode Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adaptive control of waveguide modes in a two-mode-fiber

Lü¹,

Shipton²,

Wang³

et al. 2014

Opt. Express

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show abstract

“…Moreover, enhanced resolution beyond the diffraction limit is possible by using saturated excitation and temporal modulation [22]. Recent works also propose methods for high-speed multimode-fiber imaging [23,24].…”

Section: Introductionmentioning

confidence: 99%

Aberrations of the point spread function of a multimode fiber due to partial mode excitation

Descloux¹,

Amitonova²,

Pinkse³

2016

Opt. Express

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Abstract:We investigate the point spread function of a multimode fiber. The distortion of the focal spot created on the fiber output facet is studied for a variety of the parameters. We develop a theoretical model of wavefront shaping through a multimode fiber and use it to confirm our experimental results and analyze the nature of the focal distortions. We show that aberration-free imaging with a large field of view can be achieved by using an appropriate number of segments on the spatial light modulator during the wavefront-shaping procedure. The results describe aberration limits for imaging with multimode fibers as in, e.g., microendoscopy. Zheltikov, "Implantable fiber-optic interface for parallel multisite long-term optical dynamic brain interrogation in freely moving mice," Sci. Rep. 3, 3265 (2013). 9. L. V. Doronina-Amitonova,

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Optically Selective Neuron Stimulation with a Wavefront Shaping‐Empowered Multimode Fiber

Zhong

Qiu

et al. 2021

Advanced Photonics Research

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Selective stimulation of neuron cells at high spatiotemporal resolution in deep brain is a major goal in neuroscience. [1][2][3] Research indicates that neurons can sense, transduce, and respond to various external stimuli such as electric, magnetic, heat, and mechanical stimuli. [4,5] Unmodified neurons may be stimulated directly to evoke action potentials with external fields, such as deep brain stimulation (DBS), [4] but such techniques lacked specificity and selectivity to individual neurons. To address that, in the so-called "optogenetics," chosen neurons can be selectively inserted with wellcharacterized light sensitive proteins (e.g., opsins) and enabled to respond to light stimulation, while other cells remain silent. [6,7] It enables precise neural manipulation with specific time sequence. [4,5,8] Such advancement of spatial resolution and specificity has made optogenetics a powerful tool in neuroscience, especially in exploring the connection between behavior and neural circuits and in treating brain diseases.However, it usually requires invasive procedures to deliver photons into deep brain regions as skull and brain tissue have strong scattering effects to visible and nearinfrared light which is often used in optogenetics. Practically, one may insert a thin optical fiber into a specific deep brain region for neuron activation, which allows for free moving animal manipulations in vivo. The output light from the fiber, no matter it is single-mode fiber (SMF) or multimode fiber (MMF), is divergent and characterized by a large illumination spot or random speckled pattern at a short distance away from the distal fiber end, which fails to meet the spatial variant of the neurons in the field of view (FOV). Although some groups reported that multitargets from a large FOV could be controlled and monitored via a tapered optical fiber, [9] single-fiber-

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Real-time resilient focusing through a bending multimode fiber

Cited by 181 publications

References 28 publications

Adaptive control of waveguide modes in a two-mode-fiber

Adaptive control of waveguide modes in a two-mode-fiber

Aberrations of the point spread function of a multimode fiber due to partial mode excitation

Optically Selective Neuron Stimulation with a Wavefront Shaping‐Empowered Multimode Fiber

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