Artificial neural networks for photonic applications—from algorithms to implementation: tutorial

Advances in Optics and Photonics, Год журнала: 2023, Номер 15(3), С. 739 - 739

Опубликована: Авг. 3, 2023

This tutorial-review on applications of artificial neural networks in photonics targets a broad audience, ranging from optical research and engineering communities to computer science applied mathematics. We focus here the areas at interface between these disciplines, attempting find right balance technical details specific each domain overall clarity. First, we briefly recall key properties peculiarities some core network types, which believe are most relevant photonics, also linking layer's theoretical design hardware realizations. After that, elucidate question how fine-tune selected model's perform required task with optimized accuracy. Then, review part, discuss recent developments progress for several including multiple aspects communications, imaging, sensing, new materials lasers. In following section, put special emphasis accurately evaluate complexity context transition algorithms implementation. The introduced characteristics used analyze as specific, albeit highly important example, comparing those benchmark signal processing methods. combine description well-known model compression strategies machine learning, novel techniques recently networks. It is stress that although our this methods presented can be handy much wider range scientific applications.

Язык: Английский

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Spatiotemporal mode-locking and dissipative solitons in multimode fiber lasers

Light Science & Applications, Год журнала: 2023, Номер 12(1)

Опубликована: Окт. 30, 2023

Multimode fiber (MMF) lasers are emerging as a remarkable testbed to study nonlinear spatiotemporal physics with potential applications spanning from high energy pulse generation, precision measurement microscopy. The underlying mechanism for the generation of ultrashort pulses, which can be understood spatiotempoal dissipative soliton (STDS), in multimode resonators is mode-locking (STML) simultaneous synchronization temporal and spatial modes. In this review, we first introduce general principles STML, an emphasize on STML dynamics large intermode dispersion. Then, present recent progress including techniques exotic STDS, mode field engineering MMF lasers. We conclude by outlining some perspectives that may advance near future.

Язык: Английский

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All-step-index-fiber spatiotemporally mode-locked laser

Optica, Год журнала: 2023, Номер 10(3), С. 356 - 356

Опубликована: Янв. 31, 2023

Spatiotemporal mode-locking (STML) in multi-mode fiber (MMF) lasers has extended the concept of temporal dissipative solitons into spatiotemporal solitons. To date, all reported STML MMF used graded-index (GRIN) MMFs either solely or hybridly with other fibers. Compared to GRIN MMFs, step-index (STIN) have much larger intermode dispersion on both group and phase velocities. Building all-STIN can provide a new platform explore soliton dynamics. Here, we report experimental numerical observation an laser. Distinct from lasers, large laser cannot be balanced by Kerr nonlinearity, significant walk-off between mode-resolved pulses was observed experimentally. Simulations suggest that this is counteracted spatial coupling laser, mother–child mechanism proposed understand it. This enable single repetition rate infinitely dispersion. Our work enriches architectures for parameter regime not been considered, our knowledge.

Язык: Английский

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Spectral-temporal-spatial customization via modulating multimodal nonlinear pulse propagation

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 6, 2024

Abstract Multimode fibers (MMFs) are gaining renewed interest for nonlinear effects due to their high-dimensional spatiotemporal dynamics and scalability high power. High-brightness MMF sources with effective control of the processes would offer possibilities in many areas from high-power fiber lasers, bioimaging chemical sensing, intriguing physics phenomena. Here we present a simple yet way controlling at peak power levels. This is achieved by leveraging not only spatial but also temporal degrees freedom during multimodal pulse propagation step-index MMFs, using programmable shaper that introduces time-dependent disorders. We achieve tunability output fields, resulting broadband high-peak-power source. Its potential as imaging source further demonstrated through widely tunable two-photon three-photon microscopy. These demonstrations provide technology advances optics, bioimaging, spectroscopy, optical computing, material processing.

Язык: Английский

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Multistable Kuramoto Splay States in a Crystal of Mode-Locked Laser Pulses

Physical Review Letters, Год журнала: 2025, Номер 134(3)

Опубликована: Янв. 22, 2025

We demonstrate the existence of coexisting frequency combs in a harmonically mode-locked laser that we link to splay phases Kuramoto model with short range interactions. These states are multistable and may wander between them under influence stochastic forces. Consequently, many pulses circulating cavity not necessarily coherent each other. As these partially disordered for phase field still feature regular intensity pulses, term as incoherent crystals optical pulses. provide evidence notion coherence should be interpreted by comparing duration measurement time Kramers' escape state. Our theoretical results confirmed experimentally performing high resolution spectral measurements via heterodyne technique passively vertical external-cavity surface-emitting laser.

Язык: Английский

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Advanced remote focus control in multicore meta-fibers through 3D nanoprinted phase-only holograms

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 8, 2025

Abstract In this study, we present an unexplored approach for remote focus manipulation using 3D nanoprinted holograms integrated on the end face of multi-core single-mode fibers. This innovative method enables precise control within a monolithic metafiber device by allowing light coupled into any 37 cores to be precisely focused at predefined locations. Our demonstrates significant advances over conventional lenses and offers unique functionalities through computationally designed holograms. research marks first successful use fibers via nanoprinting, achieving crosstalk-free operation visible wavelengths. Key findings include strong agreement between design, simulation, experimental results, highlighting potential technology improve applications in fields such as biological optics, laser micromachining, telecommunications, surgery. work opens new avenues development advanced optical systems with superior capabilities.

Язык: Английский

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Recent advances and future outlook in mode-locked lasers with multimode fibers

Applied Physics Reviews, Год журнала: 2023, Номер 10(4)

Опубликована: Ноя. 14, 2023

Multimode fibers (MMFs) have attracted interest because of their larger mode area and additional spatial degrees freedom compared with single-mode fibers. Recently, MMFs been introduced into mode-locked lasers for new cavity structures better laser performance. Among these lasers, there are two remarkable cases in which the key components mode-locking: One is using a short segment MMF as saturable absorber (SA), has advantages high damage threshold, wide operating bandwidth, low cost. The other construction multimode cavities MMFs. Spatiotemporal mode-locking (STML), general form mode-locking, can be achieved such cavities. Herein, we review types principles MMF-based SA STML described based on common theory nonlinear fiber optics. Subsequently, present detailed overview recent progress regarding including by SAs at 1-, 1.5-, 2-μm bands, well spatiotemporal lasers. A perspective development also provided.

Язык: Английский

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Deep Learning and Adjoint Method Accelerated Inverse Design in Photonics: A Review

Photonics, Год журнала: 2023, Номер 10(7), С. 852 - 852

Опубликована: Июль 23, 2023

For photonic applications, the inverse design method plays a critical role in optimized of devices. According to its two ingredients, photonics can be improved from aspects: find solutions Maxwell’s equations more efficiently and employ suitable optimization scheme. Various algorithms have been employed handle optimization: adjoint (AM) has become one most widely utilized ones because low computational cost. With rapid development deep learning (DL) recent years, also benefited DL algorithms, leading new pattern photon design. Unlike AM, an efficient solver equations, as well nice optimizer, or even both, In this review, we discuss AM design, advancements, advantages, disadvantages

Язык: Английский

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光纤锁模激光器：从单模时域耗散孤子锁模到多模时空耗散孤子锁模（特邀）

Chinese Journal of Lasers, Год журнала: 2024, Номер 51(1), С. 0101003 - 0101003

Опубликована: Янв. 1, 2024

在光纤锁模激光器中,模式相位锁定产生周期短脉冲的过程称为锁模过程,产生的脉冲在广义上被称为"光耗散孤子"。光纤锁模激光器从传统的单模光纤锁模激光器发展到了多模光纤锁模激光器,锁模机理从一维(1D)时域耗散孤子锁模发展到了(3+1)维时空耗散孤子锁模。通过深入理解耗散孤子的产生机理,有望进一步推动光纤锁模激光器在科学和应用领域的发展,为更多领域带来更多创新和可能性。首先介绍单模光纤锁模激光器中的一维时域耗散孤子锁模,探讨不同色散区域中时域耗散孤子的产生机理;随后介绍多模光纤锁模激光器中时空耗散孤子的最新研究成果,讨论模间色散的补偿方法,揭示其丰富的时空锁模机理和潜在的应用场景;最后对光纤锁模激光器的发展前景进行展望。

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Experimental Observation of the Spontaneous Emission of a Space–Time Wavepacket in a Multimode Optical Fiber

ACS Photonics, Год журнала: 2023, Номер 10(3), С. 727 - 732

Опубликована: Фев. 21, 2023

We provide a complete analysis, from theory to experiment, of the spontaneous emergence discretized conical wave X-type (i.e., localized 2D+1 space-time wavepacket) when an intense ultrashort pulse nonlinearly propagates in multimode fiber. In particular, we reveal that this spatiotemporal phenomenon corresponds broadband intermodal dispersive emission unsteady structure formed during nonlinear propagation. Theoretical phase-matching predictions are experimentally and numerically confirmed commercially available step-index Our results general understanding phase-matched radiations emitted by waves multidimensional optical system.

Язык: Английский

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