Photonic multiplexing techniques for neuromorphic computing

Nanophotonics, Год журнала: 2023, Номер 12(5), С. 795 - 817

Опубликована: Янв. 9, 2023

Abstract The simultaneous advances in artificial neural networks and photonic integration technologies have spurred extensive research optical computing (ONNs). potential to simultaneously exploit multiple physical dimensions of time, wavelength space give ONNs the ability achieve operations with high parallelism large-data throughput. Different multiplexing techniques based on these degrees freedom enabled large-scale interconnectivity linear functions. Here, we review recent different approaches multiplexing, present our outlook key needed further advance multiplexing/hybrid-multiplexing ONNs.

Язык: Английский

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Optical multiplexing techniques and their marriage for on-chip and optical fiber communication: a review

Opto-Electronic Advances, Год журнала: 2022, Номер 5(8), С. 210127 - 210127

Опубликована: Янв. 1, 2022

Herein, an attention-grabbing and up-to-date review related to major multiplexing techniques is presented which includes wavelength division (WDM), polarization (PDM), space (SDM), mode (MDM) orbital angular momentum (OAMM). Multiplexing a mechanism by multiple signals are combined into shared channel used showcase the maximum capacity of optical links. However, it critical develop hybrid methods allow enhanced numbers. In this review, we have also included such as WDM-PDM, WDM-MDM PDM-MDM. It probable attain N×M channels utilizing N wavelengths M guided-modes simply (de)multiplexers. To best our knowledge, paper one its kind has highlighted most prominent recent signs progress in place.

Язык: Английский

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Multi-dimensional data transmission using inverse-designed silicon photonics and microcombs

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Дек. 21, 2022

The use of optical interconnects has burgeoned as a promising technology that can address the limits data transfer for future high-performance silicon chips. Recent pushes to enhance communication have focused on developing wavelength-division multiplexing technology, and new dimensions will be paramount fulfill ever-growing need speed. Here we demonstrate an integrated multi-dimensional scheme combines wavelength- mode- photonic circuit. Using foundry-compatible inverse design spectrally flattened microcombs, 1.12-Tb/s natively error-free transmission throughout nanophotonic waveguide. Furthermore, implement inverse-designed surface-normal couplers enable multimode between separate chips multimode-matched fibre. All devices comply with process rules standard foundries. Our approach is inherently scalable multiplicative enhancement over state art transmitters.

Язык: Английский

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Effective amplification of optical solitons in high power transmission systems

Nonlinear Dynamics, Год журнала: 2022, Номер 109(4), С. 3083 - 3089

Опубликована: Июнь 10, 2022

Язык: Английский

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Digital Subcarrier Multiplexing: Enabling Software-Configurable Optical Networks

Journal of Lightwave Technology, Год журнала: 2022, Номер 41(4), С. 1175 - 1191

Опубликована: Окт. 3, 2022

The various topologies, traffic patterns and cost targets of optical networks have prevented the deployment end-to-end solutions across multi-domains, optimization network as a whole. consequent limitations in flexibility, scalability, adaptability will become increasingly important with new applications, such 5G/6G. Coherent transceivers based on digital subcarrier multiplexing (DSCM) are proposed to address these current constraints. In particular, DSCM allows (i) design high-capacity point-to-point (P2P) -multipoint (P2MP) networks; (ii) simplified aggregation passive optics; (iii) connections between low- high-speed transceivers. Furthermore, DSCM-based reduce number opto-electro-opto stages, halve bookended transceivers, provide better match for existing hub-and-spoke (H&S) fast-growing dynamic access/metro segments. A transceiver pave way next-generation flexible, adaptable, scalable software-configurable networks. Key steps elements realize this solution laid out, promising applications outlined. first real-time experimental results coherent P2MP presented.

Язык: Английский

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S-, C- and L-band transmission over a 157 nm bandwidth using doped fiber and distributed Raman amplification

Optics Express, Год журнала: 2022, Номер 30(6), С. 10011 - 10011

Опубликована: Март 4, 2022

We investigate optical transmission of an ultra-wideband signal in a standard single mode fiber. Using near continuous bandwidth exceeding 157 nm across the S-, C- and L-bands, we combine doped-fiber amplifiers covering S, C L-bands with distributed Raman amplification to enable high-quality polarization division multiplexed (PDM)-256-quadrature-amplitude modulation (QAM) signals over 54 km single-mode receive 793 × 24.5 GBd from 1466.34 1623.57 measure data rate estimated generalized mutual information (GMI) 256.4 Tb/s LDPC decoded throughput 244.3 Tb/s. The measured rates exceed highest previously fiber, showing potential for S-band enhance achievable fibers.

Язык: Английский

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Nonlinear multimode photonics: nonlinear optics with many degrees of freedom

Optica, Год журнала: 2022, Номер 9(7), С. 824 - 824

Опубликована: Июнь 16, 2022

The overall goal of photonics research is to understand and control light in new richer ways facilitate applications. Many major developments this end have relied on nonlinear optical techniques, such as lasing, mode-locking, parametric downconversion, enable applications based the interactions coherent with matter. These processes often involve between photonic material degrees freedom spanning multiple spatiotemporal scales. While great progress has been made relatively simple optimizations, maximizing single-mode coherence or peak intensity alone, ultimate achievement engineering complete, multidimensional light–light light–matter through tailored construction complex fields systems that exploit all light’s freedom. This capability now within sight, due advances telecommunications, computing, algorithms, modeling. Control highly multimode also facilitates quantitative qualitative imaging, sensing, communication, information processing since these directly depend our ability detect, encode, manipulate many possible. Today, are increasingly being enhanced enabled by both nonlinearity. Here, we provide a brief overview photonics, focusing primarily wave propagation and, particular, promising future directions routes We conclude an emerging methodologies will complex, devices

Язык: Английский

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High-speed Si-Ge avalanche photodiodes

PhotoniX, Год журнала: 2022, Номер 3(1)

Опубликована: Март 25, 2022

Abstract High-speed optical interconnects of data centers and high performance computers (HPC) have become the rapid development direction in field communication owing to explosive growth market demand. Currently, interconnect systems are moving towards higher capacity integration. High-sensitivity receivers with avalanche photodiodes (APDs) paid more attention due capability enhance gain bandwidth. The impact ionization coefficient ratio is one crucial parameter for photodiode optimization, which significantly affects excess noise bandwidth product (GBP). silicon-germanium (Si-Ge) APDs promising thanks low silicon, simple structure, CMOS compatible process. Separate absorption charge multiplication (SACM) structures typically adopted Si-Ge achieve noise. This paper reviews design optimization high-speed APDs, including advanced APD structures, modeling receivers.

Язык: Английский

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Roadmap on multimode photonics

Journal of Optics, Год журнала: 2022, Номер 24(8), С. 083001 - 083001

Опубликована: Июнь 20, 2022

Abstract Multimode devices and components have attracted considerable attention in the last years, different research topics themes emerged very recently. The multimodality can be seen as an additional degree of freedom designing devices, thus allowing for development more complex sophisticated components. propagation modes used to increase fiber optic capacity, but also introduce novel intermodal interactions, well manipulation optical a variety applications. In this roadmap we would like give readers comprehensive overview most recent developments field, presenting contributions coming from topics, including technologies, integrated optics, basic physics telecommunications.

Язык: Английский

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Learning the matrix of few-mode fibers for high-fidelity spatial mode transmission

APL Photonics, Год журнала: 2022, Номер 7(6)

Опубликована: Май 16, 2022

Few-mode fibers (FMFs) are promising for advancements in transmission capacity classical and quantum communications. However, the inherent modal crosstalk limits practical application of FMF. One reliable way to overcome this obstacle is measurement complex matrix (TM), describing light propagation behavior fiber. The TM can be obtained by performing mode decomposition (MD) spatial modes at output MD techniques require retrieval both amplitude phase components detected field, which commonly done using holography. provision a reference wave highly unfavorable implementation holography-based communication technology, especially long fibers. Using deep neural networks process intensity-only images, drawback overcome. We introduce transformer network, perform on 23 has been trained offline synthetic data. Experimentally, we demonstrate, first time, not only an FMF but also inversion learning-based method. For transmission, achieve average fidelity 97%. short duration determination allows overcoming time-varying effects due to, e.g., mechanical stress or temperature fluctuations. proposed reference-less calibration fiber with single photons, such as key distribution.

Язык: Английский

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