Optimizing Optical Neural Network Design for Enhanced Compatibility with Analog Computation

Optics Express, Journal Year: 2025, Volume and Issue: 33(2), P. 2499 - 2499

Published: Jan. 6, 2025

This paper breaks away from traditional approaches that merely emulate digital neural networks. Using Mach-Zehnder interferometer (MZI) networks as a case study, we explore the impact of inherent properties analog computation on performance and identify characteristics optical (ONNs) components should possess to better adapt these specific properties. Specifically, examine influence bias power activation functions, well pruning ONN’s performance. The results show suitably larger relative normalized data concave functions are more compatible with ONNs. These factors can significantly improve classification accuracy across different datasets ξ values, improvements reaching up 35%. Additionally, reduces number MZIs by two-thirds while maintaining Moreover, measures enhance robustness ONNs against MZI losses phase errors. Although this research primarily focuses feedforward MZI-based networks, proposed design principles widely applicable other types

Language: Английский

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Programming universal unitary transformations on a general-purpose silicon photonic platform

APL Photonics, Journal Year: 2025, Volume and Issue: 10(2)

Published: Feb. 1, 2025

General-purpose programmable photonic processors provide a versatile platform for integrating diverse functionalities on single chip. Leveraging two-dimensional hexagonal waveguide mesh of Mach–Zehnder interferometers, these systems have demonstrated significant potential in microwave applications. Additionally, they are promising creating unitary linear transformations, which key elements quantum computing and neural networks. However, general procedure implementing transformations such has not been established yet. This work demonstrates the programming universal general-purpose circuit with topology. We detail steps to split light on-chip, demonstrate that an equivalent structure interferometer one internal external phase shifter can be built mesh, program both triangular rectangular architectures matrix multiplication. recalibrate system account passive deviations. Experimental 3 × 4 random matrices yields fidelities >98% bit precisions over five bits. To best our knowledge, this is first time processor pave way implementation circuits optical signal processing systems.

Language: Английский

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Unitary control of multiport wave transmission

Physical review. A/Physical review, A, Journal Year: 2025, Volume and Issue: 111(2)

Published: Feb. 10, 2025

Language: Английский

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Programmable photonic unitary circuits for light computing

Nanophotonics, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract Unitarity serves as a fundamental concept for characterizing linear and conservative wave phenomena in both classical quantum systems. Developing platforms that perform unitary operations on light waves universal programmable manner enables the emulation of complex light–matter interactions execution general-purpose functionalities manipulations, photonic computing, circuits. Recently, numerous approaches to implementing circuits have been proposed demonstrated, each employing different design strategies distinctly impact overall device performance. Here, we review foundational principles recent achievements implementation circuits, with particular focus integrated platforms. We classify based dimensionality nontrivial unit their building blocks: lower-dimensional units, such SU(2) operations, higher-dimensional ones, Fourier transforms. In category, efforts leverage alternative physical axes, temporal frequency domains, address scalability challenges are also reviewed. discuss underlying concepts, procedures, trade-offs strategy, especially relation light-based computing.

Language: Английский

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Chip-to-chip optical multimode communication with universal mode processors

PhotoniX, Journal Year: 2023, Volume and Issue: 4(1)

Published: Oct. 27, 2023

Abstract The increasing amount of data exchange requires higher-capacity optical communication links. Mode division multiplexing (MDM) is considered as a promising technology to support the higher throughput. In an MDM system, mode generator and sorter are backbone. However, most current schemes lack programmability universality, which makes link susceptible crosstalk environmental disturbances. this paper, we propose intelligent multimode using universal processing (generation sorting) chips. processor consists programmable 4 × Mach Zehnder interferometer (MZI) network can be intelligently configured generate or sort both quasi linearly polarized (LP) modes orbital angular momentum (OAM) in any desired routing state. We experimentally establish chip-to-chip system. basis freely switched between four LP OAM modes. also demonstrate capability at rate 25 Gbit/s. proposed scheme shows significant advantages terms intelligence, resistance crosstalk, disturbances, fabrication errors, demonstrating that MZI-based reconfigurable chip has great potential long-distance systems.

Language: Английский

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