Optical mode switch based on multimode interference couplers

Xiao, Huifu; Deng, Lin; Zhao, Guolin; Liu, Zilong; Meng, Yinghao; Guo, Xiaoqian; Liu, Guipeng; Liu, Su; Ding, Jianfeng; Tian, Yonghui

doi:10.1088/2040-8986/19/2/025802

Cited by 22 publications

(9 citation statements)

References 26 publications

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“…When the two modes are input from different ports of the multimode switching element and output from the same port, the crosstalk noise C 2,1 generated by the TE m mode to the TE n mode can be illuminated as Equation (24). Correspondingly, the crosstalk noise C 2,2 generated by TE n mode to TE m mode can be obtained by Equation (25).…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the mode division multiplexing technology is considered to be a very promising technology, which can provide scalable bandwidth growth for data centers to meet future network requirements. In recent years, many optical devices for mode multiplexing have been studied, such as mode (de)multiplexers [16][17][18][19][20], multimode bendings [21,22], multimode waveguide crossings [22][23][24], multimode switches [25][26][27], and mode filters [28,29].…”

Section: Introductionmentioning

confidence: 99%

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An N-Port Universal Multimode Optical Router Supporting Mode-Division Multiplexing

Yang

Liu

et al. 2021

Micromachines

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Optical network-on-chip (ONoC) is based on optical interconnects and optical routers (ORs), which have obvious advantages in bandwidth and power consumption. Transmission capacity is a significant performance in ONoC architecture, which has to be fully considered during the design process. Relying on mode-division multiplexing (MDM) technology, the system capacity of optical interconnection is greatly improved compared to the traditional multiplexing technology. With the explosion in MDM technology, the optical router supporting MDM came into being. In this paper, we design a multimode optical router (MDM-OR) model and analyze its indicators. Above all, we propose a novel multimode switching element and design an N-port universal multimode optical router (MDM-OR) model. Secondly, we analyze the insertion loss model of different optical devices and the crosstalk noise model of N-port MDM-OR. On this basis, a multimode router structure of a single-mode five-port optical router is proposed. At the same time, we analyze the transmission loss, crosstalk noise, signal-to-noise radio (OSNR), and bit error rate (BER) of different input–output pairs by inputting the 1550 nm TE0, TE1, and TE2 modes to the router.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An N-Port Universal Multimode Optical Router Supporting Mode-Division Multiplexing

Yang

Liu

et al. 2021

Micromachines

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“…Then, a spatial switching mechanism is applied to switch these fundamental modes. Some various approaches for switching multimode have been proposed and demonstrated via photonic integrated circuits, such as microrings-based switch [17], [18], silicon adiabatic couplers-based switch [19]- [22], and multimode interference coupler-based switch [23]- [25]. However, such structures either need many asymmetric adiabatic couplers for deploying the (de)multiplexing functionalities before the switching operation or use indispensable waveguide crossing elements.…”

Section: Introductionmentioning

confidence: 99%

Compact, Highly Efficient, and Controllable Simultaneous 2 × 2 Three-Mode Silicon Photonic Switch in the Continuum Band

et al. 2021

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Multimode switch (MMS) allows realizing multimode optical communication with high-speed communication. However, to develop such an ultrafast switch for simultaneous multimode with a compact size is very challenging. This paper designs and demonstrates a compact multimode 2×2 MMS based on numerical simulation methods using silicon Ψ-junctions and multimode interference (MMI) couplers. The switch is controlled by thermal-optic phase shifters, which permits to switch simultaneous states of the optical signal between three quasi-transverse electric modes. The MMS exhibits a low insertion loss and low crosstalk below -3 dB and -22 dB in 40-nm bandwidth in the third telecom window from 1520 to 1560 nm. With a compact footprint of 12 µm × 1300 µm, the MMS exhibits relatively large dimensional tolerances. Besides, the MMS provides low electric power consumption levels, which is smaller than 40 mW at an ultrafast switching time of 4.4 µs without the impact of the plasmonic effect. Furthermore, the proposed MMS can be reconfigurable and scalable in multidimensional and multifunctional on-chip mode-division multiplexing optical interconnects. Therefore, the proposed MMS is promising potential for large-scale integrated photonic circuits in the continuum band.

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“…Besides, currently, an on-chip MDM system, especially CMOS-compatible silicon-based MDM systems, is preferable to provide a possible way for the large-scale high-capacity data exchange in data communication networks (DCNs) [17] due to utilizing significant highlights of silicon photonics, such as high compactness, low loss, broad-spectrum response, reasonable manufacturing cost. Silicon photonics-based MDM devices also play the important roles to construct chip-scale systems through many photonic mode division signal processing functionalities, such as mode (de)multiplexing [18][19][20][21], mode add/drop multiplexing [22,23], mode conversion [24,25], mode routing [26,27], and mode switching [28][29][30][31]. It is seen that since the thermooptic (TO) effect has been widely applied to control the phase angle of light when traveling through the silicon waveguides [31,32], the MDM devices based on the SOI platform could operate much more flexibly via the phase-driven process by manipulating metallic microheaters.…”

Section: Introductionmentioning

confidence: 99%

A compact 1×3 two-mode selective silicon photonic router/switch using two tunable phase shifters

Duy¹,

Truong²,

Bac³

et al. 2021

EAI Endorsed Transactions on Industrial Networks and Intelligen

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In this work, we propose a design in the proof-of-concept of a 1×3 two-mode selective silicon-photonics router/switch. The proposed device composes of a Y-junction coupler, two multimode interference (MMI) couplers, and two phase-shifters on the silicon-on-insulator (SOI) rib waveguides. The input modes of TE 0 and TE 1 can be arbitrarily and simultaneously routed to the yearning output ports by setting appropriate values (ON/OFF) for two tunable phase shifters (PSs). The structural optimization and efficient characterization processes are carried out by numerical simulation via three-dimensional beam propagation method. The proposed device exhibits the operation ability over the C-band with good optical performances in terms of insertion loss smaller than 1 dB, crosstalk under -19 dB, and relatively large geometry tolerances. Moreover, the proposed device can integrate into a footprint as compact as 5 µm × 475 µm. Such significant advantages are beneficial and promising potentials for very large-scale photonic integrated circuits, high-speed optical interconnects, and short-haul few-mode fiber communication systems.

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Optical mode switch based on multimode interference couplers

Cited by 22 publications

References 26 publications

An N-Port Universal Multimode Optical Router Supporting Mode-Division Multiplexing

An N-Port Universal Multimode Optical Router Supporting Mode-Division Multiplexing

Compact, Highly Efficient, and Controllable Simultaneous 2 × 2 Three-Mode Silicon Photonic Switch in the Continuum Band

A compact 1×3 two-mode selective silicon photonic router/switch using two tunable phase shifters

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