On-chip optical matrix-vector multiplier based on mode division multiplexing

Ling, Qiaolv; Dong, Penghui; Chu, Yayan; Dong, Xiaowen; Chen, Jingye; Dai, Daoxin; Shi, Yaocheng

doi:10.1016/j.chip.2023.100061

Cited by 8 publications

(2 citation statements)

References 39 publications

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“…Robust and broadband coupling for mode-selective 3D waveguide coupler PLC-based integrated optics are technically based on 2D planar rectangular or ridge waveguides 28,29 , which have an inherent limitation in propagating and transforming circularly symmetric modes unless an additional lossy mode rotator is inserted 30 . In contrast, 3D waveguides can overcome this limitation by providing new degrees of freedom in controlling optical coupling, including customized cross-sectional shape, controllable RI contrast, as well as 3D spatial geometric arrangements, thereby resulting in a reduced device complexity and an increased compactness.…”

Section: Variable Mode-field-diameter (Mfd) Of Single-mode Ocms Waveg...mentioning

confidence: 99%

Precise mode control of laser-written waveguides for broadband, low-dispersion 3D integrated optics

Wang,

Zhong,

Lau

et al. 2024

Light Sci Appl

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Three-dimensional (3D) glass chips are promising waveguide platforms for building hybrid 3D photonic circuits due to their 3D topological capabilities, large transparent windows, and low coupling dispersion. At present, the key challenge in scaling down a benchtop optical system to a glass chip is the lack of precise methods for controlling the mode field and optical coupling of 3D waveguide circuits. Here, we propose an overlap-controlled multi-scan (OCMS) method based on laser-direct lithography that allows customizing the refractive index profile of 3D waveguides with high spatial precision in a variety of glasses. On the basis of this method, we achieve variable mode-field distribution, robust and broadband coupling, and thereby demonstrate dispersionless LP21-mode conversion of supercontinuum pulses with the largest deviation of <0.1 dB in coupling ratios on 210 nm broadband. This approach provides a route to achieve ultra-broadband and low-dispersion coupling in 3D photonic circuits, with overwhelming advantages over conventional planar waveguide-optic platforms for on-chip transmission and manipulation of ultrashort laser pulses and broadband supercontinuum.

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Section: Variable Mode-field-diameter (Mfd) Of Single-mode Ocms Waveg...mentioning

confidence: 99%

Precise mode control of laser-written waveguides for broadband, low-dispersion 3D integrated optics

Wang,

Zhong,

Lau

et al. 2024

Light Sci Appl

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“…Taking advantage of the intrinsic high parallelism and bandwidth of photons, combined with highly compact and phase-stable optoelectronic integrated technology, integrated optical computing, encompassing optical neural network (ONN) 17 – 27 , optical quantum computing 28 – 32 and NP problem solving 33 , has not only captured significant interest within academia but also gained widespread recognition within the industry. In recent years, integrated optical computing has shown the potential to achieve state-of-the-art computing power and energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency reinforcement learning with hybrid architecture photonic integrated circuit

Li,

Ma,

et al. 2024

Nat Commun

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Reinforcement learning (RL) stands as one of the three fundamental paradigms within machine learning and has made a substantial leap to build general-purpose learning systems. However, using traditional electrical computers to simulate agent-environment interactions in RL models consumes tremendous computing resources, posing a significant challenge to the efficiency of RL. Here, we propose a universal framework that utilizes a photonic integrated circuit (PIC) to simulate the interactions in RL for improving the algorithm efficiency. High parallelism and precision on-chip optical interaction calculations are implemented with the assistance of link calibration in the hybrid architecture PIC. By introducing similarity information into the reward function of the RL model, PIC-RL successfully accomplishes perovskite materials synthesis task within a 3472-dimensional state space, resulting in a notable 56% improvement in efficiency. Our results validate the effectiveness of simulating RL algorithm interactions on the PIC platform, highlighting its potential to boost computing power in large-scale and sophisticated RL tasks.

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MEMS‐enabled Ultralow Power Consumption Programmable Arbitrary Order Mode Switch

Sun,

Qiao,

Lee

et al. 2024

Laser & Photonics Reviews

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Mode‐division‐multiplexing (MDM) recently attracted much interest due to its ability to enhance the capacity for optical information communication. To meet growing data transmission demands and enable flexible on‐chip mode manipulation, programmable optical mode converter switches are essential. This work introduces a micro‐electromechanical‐system (MEMS)‐enabled programmable arbitrary order mode switch, capitalizing on the benefits of MEMS technology such as low power consumption, robust modulation capabilities, and seamless large‐scale integration. Employing newly developed MEMS‐tunable mode converter (MTMC) units, the system achieves high conversion efficiencies from the fundamental mode to arbitrary higher‐order modes and supports programmable power distribution among different modes by cascading multiple MTMCs. As a proof‐of‐concept, a programmable TE0–TE0/1/2 mode switch operates in the 3.64 to 3.71 µm wavelength range, achieving maximum crosstalk values of –9.56 and –9.88 dB for TE0 to TE1 and TE0 to TE2 mode conversion, respectively, and a remarkably low power consumption of 67 pW. Furthermore, a programmable mode multiplexer is developed by simultaneously actuating two MEMS actuators to modulate phase matching conditions, enabling arbitrary power splitting ratios among these modes. The demonstrated scalability and flexibility of the proposed system highlight its potential as a foundational component for MDM systems.

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On-chip optical matrix-vector multiplier based on mode division multiplexing

Cited by 8 publications

References 39 publications

Precise mode control of laser-written waveguides for broadband, low-dispersion 3D integrated optics

Precise mode control of laser-written waveguides for broadband, low-dispersion 3D integrated optics

High-efficiency reinforcement learning with hybrid architecture photonic integrated circuit

MEMS‐enabled Ultralow Power Consumption Programmable Arbitrary Order Mode Switch

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