Reconfigurable and Scalable Multimode Silicon Photonics Switch for Energy-Efficient Mode-Division-Multiplexing Systems

Priti, Rubana Bahar; Liboiron-Ladouceur, Odile

doi:10.1109/jlt.2019.2921797

Cited by 41 publications

(9 citation statements)

References 31 publications

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“…Two outermost access arms of two MMI couplers are linked via two controllable phase shifters. Depending on the choice of appropriate phase-difference combinations, either (2π/3,0), (0, 2π/3), (-2π/3, -2π/3), the switch will select the output at the left, middle, or right sides [53]. A numerical simulation of the electric field envelope distribution and the transmission spectral wavelength response characteristics of a 1×3 MMI multimode coupler are shown in the subfigures of Fig.…”

Section: Components Of a Photonic Chipmentioning

confidence: 99%

Self-Controlling Photonic-on-Chip Networks With Deep Reinforcement Learning

Truong

Nguyễn

et al. 2021

Preprint

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We present a novel photonic chip design for high bandwidth four-degree optical switches that support high-dimensional switching mechanisms with low insertion loss and low crosstalk in a low power consumption level and a short switching time. Such four-degree photonic chips can be used to build an integrated full-grid Photonic-on-Chip Network (PCN). With four distinct input/output directions, the proposed photonic chips are superior compared to the current bidirectional photonic switches, where a conventionally sizable PCN can only be constructed as a linear chain of bidirectional chips. Our four-directional photonic chips are more flexible and scalable for the design of modern optical switches, enabling the construction of multi-dimensional photonic chip networks that are widely applied for intra-chip communication networks and photonic data centers. More noticeably, our photonic networks can be self-controlling with our proposed Multi-Sample Discovery model, a deep reinforcement learning model based on Proximal Policy Optimization. On a PCN, we can optimize many criteria such as transmission loss, power consumption, and routing time, while preserving performance and scaling up the network with dynamic changes. Experiments on simulated data demonstrate the effectiveness and scalability of the proposed architectural design and optimization algorithm. Perceivable insights make the constructed architecture become the self-controlling photonic-on-chip networks.

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Section: Components Of a Photonic Chipmentioning

confidence: 99%

Self-Controlling Photonic-on-Chip Networks With Deep Reinforcement Learning

Truong

Nguyễn

et al. 2021

Preprint

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“…Since each mode is an independent channel thus potentially makes a myriad of single channel capacity for optical communications systems and optical interconnects when it combines with the wavelength division multiplexing (WDM) technique 6 , 7 . Various kinds of MDM systems have been proposed, for example, mode demultiplexer 8 , 9 , mode converter 10 , 11 , waveguide crossing 12 , 13 , mode selective switch 14 , 15 , mode add-drop multiplexer 16 , 17 , and mode router 18 .…”

Section: Introductionmentioning

confidence: 99%

On-chip silicon photonic controllable 2 × 2 four-mode waveguide switch

Truong¹,

Hang²,

Chandrahalim

et al. 2021

Sci Rep

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Multimode optical switch is a key component of mode division multiplexing in modern high-speed optical signal processing. In this paper, we introduce for the first time a novel 2 × 2 multimode switch design and demonstrate in the proof-of-concept. The device composes of four Y-multijunctions and 2 × 2 multimode interference coupler using silicon-on-insulator material with four controllable phase shifters. The shifters operate using thermo-optic effects utilizing Ti heaters enabling simultaneous switching of the optical signal between the output ports on four quasi-transverse electric modes with the electric power consumption is in order of 22.5 mW and the switching time is 5.4 µs. The multimode switch exhibits a low insertion loss and a low crosstalk below − 3 dB and − 19 dB, respectively, in 50 nm bandwidth in the third telecom window from 1525 to 1575 nm. With a compact footprint of 10 µm × 960 µm, this device exhibits a relatively large width tolerance of ± 20 nm and a height tolerance of ± 10 nm. Furthermore, the conceptual principle of the proposed multimode switch can be reconfigurable and scalable in multifunctional on-chip mode-division multiplexing optical interconnects.

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“…Mode division multiplexing (MDM) technology has attracted widespread attention by offering a new dimension to increase the data capacity using spatial modes of the waveguide using a single wavelength carrier [2]. Various SiPh devices have been developed to extend the capacity for MDM networks, such as mode multiplexer/de-multiplexer [3], switchable mode exchanger [4], multimode optical switches [5][6][7][8][9][10][11][12], power splitter [13], and more. Among them, multimode optical switch is a key component to route the multimode signals for MDM networks.…”

Section: Introductionmentioning

confidence: 99%

Scalable Two-Mode 3-Port and 4-Port Mode Insensitive Silicon Photonic Switches

Das

Zhang

Mojaver

et al. 2021

IEEE Photon. Technol. Lett.

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We propose and experimentally demonstrate a novel design approach for scalable 3-port and 4-port mode insensitive multimode switching matrices for the first two quasi-transverse electric (TE) modes. The mode insensitive phase shifter ensures less power consumption for simultaneous multimode signal transmission in a mode division multiplexing (MDM) network. At 1550 nm, the 3-port switch exhibits approximately 2.6 dB and 3.3 dB insertion loss for the longest path with a crosstalk of at most 10 dB and 8 dB over a bandwidth of 40 nm (1530 nm to 1570 nm) for modes, respectively. The insertion loss measured for the 4-port switch is approximately 2.7 dB and 3.6 dB at 1550 nm with a corresponding crosstalk less than 8 dB for the two TE modes, respectively. The payload transmission is also performed using both 10 Gb/s non-return-to-zero (NRZ) and 14.0625 Gbaud 4-level pulse-amplitude modulation (PAM4) pseudorandom binary sequence (PRBS)-31 data signal to analyze the performance of the switches. Clear open eyes are observed for both single-mode and simultaneous two-mode transmissions. The low insertion loss, low intermodal crosstalk over a large optical bandwidth, and the clear open eye validate the scalability of the proposed switches for larger port count and higher-order modes.

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Reconfigurable and Scalable Multimode Silicon Photonics Switch for Energy-Efficient Mode-Division-Multiplexing Systems

Cited by 41 publications

References 31 publications

Self-Controlling Photonic-on-Chip Networks With Deep Reinforcement Learning

Self-Controlling Photonic-on-Chip Networks With Deep Reinforcement Learning

On-chip silicon photonic controllable 2 × 2 four-mode waveguide switch

Scalable Two-Mode 3-Port and 4-Port Mode Insensitive Silicon Photonic Switches

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