Photonic unsupervised learning variational autoencoder for high-throughput and low-latency image transmission

Science Advances, Год журнала: 2023, Номер 9(7)

Опубликована: Фев. 15, 2023

Following the explosive growth of global data, there is an ever-increasing demand for high-throughput processing in image transmission systems. However, existing methods mainly rely on electronic circuits, which severely limits throughput. Here, we propose end-to-end all-optical variational autoencoder, named photonic encoder-decoder (PED), maps physical system into optical generative neural network. By modeling noises as variation latent space, PED establishes a large-scale unsupervised computing framework that integrates main computations transmission, including compression, encryption, and error correction to domain. It reduces latency computation by more than four orders magnitude compared with state-of-the-art devices ratio 57% on-off keying. Our work points direction wide range artificial intelligence-based designs next-generation communications.

Язык: Английский

---

High-dimensional spatial mode sorting and optical circuit design using multi-plane light conversion

APL Photonics, Год журнала: 2023, Номер 8(2)

Опубликована: Янв. 9, 2023

Multi-plane light converters (MPLCs) are an emerging class of optical devices capable converting a set input spatial modes to new target output modes. This operation represents linear transformation—a much sought after capability in photonics. MPLCs have potential applications both the classical and quantum optics domains, fields ranging from communications computing imaging. They consist series diffractive elements (the “planes”), typically separated by free space. The phase delays imparted each plane determined process inverse-design, most often using adjoint algorithm known as wavefront matching method (WMM), which optimizes correlation between actual MPLC outputs. In this work, we investigate high mode capacity create arbitrary sorters circuits. We focus on designs possessing low numbers planes render these experimentally feasible. To best control scenario, develop inverse-design algorithm, based gradient ascent with specifically tailored objective function, show how, low-plane limit, it converges substantially lower modal cross-talk higher fidelity than those achievable WMM. demonstrate several prototype few-plane high-dimensional sorters, operating up 55 modes, sorting photons their Zernike or orbital angular momentum state, arbitrarily randomized basis. discuss advantages drawbacks proof-of-principle prototypes describe future improvements. Our work points bright for MPLC-based technologies.

Язык: Английский

---

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

---

Emerging near‐infrared luminescent materials for next‐generation broadband optical communications

InfoMat, Год журнала: 2024, Номер 6(8)

Опубликована: Май 2, 2024

Abstract The rapid development of emerging technologies observed in recent years, such as artificial intelligence, machine learning, mobile internet, big data, cloud computing, and the Internet Everything, are generating escalating demands for expanding capacity density, speed next‐generation optical communications. This poses a significant challenge to existing communication techniques. Within this context, integration near‐infrared broadband, tunable, high‐gain luminescent materials into silicon circuits or fiber architectures transmit modulate light shows enormous potential advancing Here, review provides an overview breakthroughs epitaxial/colloidal quantum dots, metal‐active‐center‐doped broadband amplifiers tunable lasers. We also expound on efforts enhance bandwidth gain these materials‐based lasers, exploring challenges associate with developing ultra‐broadband high‐speed systems. Additionally, applications Fifth Generation Fixed Networks, 5G 6G wireless networks, compensation current Si electronic based CMOS high computing capability, prospects sources optoelectronic devices discussed. image

Язык: Английский

---

Roadmap on optical communications

Journal of Optics, Год журнала: 2024, Номер 26(9), С. 093001 - 093001

Опубликована: Июль 17, 2024

Abstract The Covid-19 pandemic showed forcefully the fundamental importance broadband data communication and internet has in our society. Optical communications forms undisputable backbone of this critical infrastructure, it is supported by an interdisciplinary research community striving to improve develop further. Since first ‘Roadmap optical communications’ was published 2016, field seen significant progress all areas, time ripe for update status. area become increasingly diverse, covering physics materials science, high-speed electronics photonics, signal processing coding, systems networks. This roadmap describes state-of-the-art future outlooks field. article divided into 20 sections on selected each written a leading expert that area. are thematically grouped four parts with 4–6 each, covering, respectively, hardware, algorithms, networks systems. Each section current status, challenges, development needed meet said challenges their As whole, provides comprehensive unprecedented overview contemporary research, should be essential reading researchers at any level active

Язык: Английский

---

402 Tb/s GMI Data-Rate OESCLU-Band Transmission

Optical Fiber Communication Conference (OFC) 2022, Год журнала: 2024, Номер unknown, С. Th4A.3 - Th4A.3

Опубликована: Янв. 1, 2024

We combine 6 doped-fiber amplifier variants with lumped and distribute Raman-amplification to transmit in all of the low-loss transmission bands silica fibers achieving an SMF record data-rate 402.2 Tb/s (GMI)-378.9 (Decoded) 37.6 THz bandwidth after 50 km.

Язык: Английский

---

Toward 6G Optical Fronthaul: A Survey on Enabling Technologies and Research Perspectives

IEEE Communications Surveys & Tutorials, Год журнала: 2024, Номер 27(1), С. 629 - 666

Опубликована: Июнь 3, 2024

The anticipated launch of the Sixth Generation (6G) mobile technology by 2030 will mark a significant milestone in evolution wireless communication, ushering new era with advancements and applications. 6G is expected to deliver ultra-high data rates almost instantaneous communications, three-dimensional coverage for everything, everywhere, at any time. In Radio Access Networks (RANs) architecture, Fronthaul connects geographically distributed Remote Units (RUs) Distributed/Digital (DUs) pool. Among all possible solutions implementing fronthaul, optical technologies remain crucial supporting as they offer high-speed, low-latency, reliable transmission capabilities meet strict requirements. This survey provides an explanation 5G future fronthaul concept presents comprehensive overview current state art research directions highlighting key perspectives fundamental designing networks 6G. Additionally, it examines benefits drawbacks each its potential applications networks. paper aims serve resource researchers industry professionals about prospects technologies, facilitating development robust efficient future.

Язык: Английский

---

Mode decomposition for multicore fibers based on far-field intensity measurements

Optics Letters, Год журнала: 2025, Номер 50(3), С. 1045 - 1045

Опубликована: Янв. 22, 2025

We present a mode decomposition method for multicore fibers (MCFs) that is based on intensity measurements in the far-field. Mode of several homemade demonstrated far-field with low residual errors. Accurate measurement supermode compositions and electric fields among cores crucial many applications involving as well their integration into multimode platforms.

Язык: Английский

---

MT-SCUNet: A hybrid neural network for enhanced mode decomposition in optical fibers

Optical Fiber Technology, Год журнала: 2025, Номер 93, С. 104196 - 104196

Опубликована: Март 18, 2025

Язык: Английский

---

Metamaterial-enabled arbitrary on-chip spatial mode manipulation

Light Science & Applications, Год журнала: 2022, Номер 11(1)

Опубликована: Июнь 1, 2022

On-chip spatial mode operation, represented as mode-division multiplexing (MDM), can support high-capacity data communications and promise superior performance in various systems numerous applications from optical sensing to nonlinear quantum optics. However, the scalability of state-of-the-art manipulation techniques is significantly hindered not only by particular mode-order-oriented design strategy but also inherent limitations possibly achievable orders. Recently, metamaterials capable providing subwavelength-scale control wavefronts have emerged an attractive alternative manipulate guided modes with compact footprints broadband functionalities. Herein, we propose a universal yet efficient framework based on topological metamaterial building block (BB), enabling excitation arbitrary high-order silicon waveguides. By simply programming layout multiple fully etched dielectric perturbations predefined mathematical formulas, conversion exchange be simultaneously realized uniform competitive performance. The extraordinary BB frame experimentally benchmarked record operator up twentieth. As proof conceptual application, 8-mode MDM transmission 28-GBaud 16-QAM signals verified aggregate rate 813 Gb/s (7% FEC). This user-friendly concept marks quintessential breakthrough for comprehensive light on-chip breaking long-standing shackles scalability, which may open fascinating opportunities complex photonic functionalities previously inaccessible.

Язык: Английский

---