Mode selecting switch using multimode interference for on-chip optical interconnects

Priti, Rubana Bahar; Bazargani, Hamed Pishvai; Xiong, Yule; Liboiron-Ladouceur, Odile

doi:10.1364/ol.42.004131

Cited by 35 publications

(20 citation statements)

References 12 publications

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“…1, is also considered in the scalability comparison. The measured average IL and average heater power for the mode selecting single-mode switch are previously reported to be −1.95 dB and 23.3 mW, respectively in [16]. The experimentally mesured average IL and average heater power for the 2-mode SMS for the individual-mode operation (i.e.…”

Section: Discussionmentioning

confidence: 81%

“…To study the scalability of the SMS, the 2-mode switch is compared with a mode selecting switch (MSS) allowing either the TE0 or TE1 mode transmission enabling a single-mode switch, reported in [16]. As this MSS utilizes the same mode decomposer, cascaded MMI couplers and metal Ti/N phase shifter of similar phase tuning efficiency, the comparison is consistent and reasonable.…”

Section: Discussionmentioning

confidence: 89%

“…The self-imaging principle of the MMI coupler [22] allows conversion, tuning and low-loss propagation of multiple guided modes using a single set of photonic components reducing footprint and power consumption. The detail design methodology of the MMIs is reported in [16]. Each metal heater phase shifter is 6 μm wide and 200 μm long consisting of 200 nm thick thin film of Ti/W alloy, as shown in Fig.…”

Section: Sms Design and Working Principlementioning

confidence: 99%

“…See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. [14], Y-branches [15] and multimode interference (MMI) couplers [16].…”

Section: Introductionmentioning

confidence: 99%

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

Priti

Liboiron-Ladouceur

2019

J. Lightwave Technol.

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A novel integrated scalable multimode switch (SMS) is experimentally demonstrated using tapered multimodeinterference-based couplers and Ti/W metal heater phase shifters for mode-division-multiplexing (MDM) silicon photonics switching. The SMS allows path-reconfigurable switching of the first two (TE0 and TE1) or the first three (TE0, TE1, and TE2) transverse electric (TE) modes using the same device achieving footprint efficiency for higher bandwidth density. A proof-of-concept realization of the two-mode switch demonstrates the (de)multiplexing and switching of broadband optical signals over the TE0 and TE1 modes exhibiting −6.5 dB insertion loss (IL) in the bar state and −7.3 dB IL in the cross state at 1550 nm with less than −14 dB crosstalk. Simultaneous switching of two parallel TE modes (TE0+TE1) exhibits less than −7.0 dB IL and −11.9 dB crosstalk at 1550 nm. An aggregated bandwidth of 2 × 10 Gb/s is experimentally achieved while switching between two non-return-to-zero PRBS31 data signals with <9.8 µs switching time and >17.7 dB switching extinction ratio (ER) for individual-mode transmission, and <7.6 µs switching time and >12.0 dB switching ER for dualmode transmission. The SMS is scalable to switch higher order TE modes with lower energy consumption (up to 63% less) than the single-mode switches indicating its potential application in energyefficient MDM photonic networks.

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 89%

Section: Sms Design and Working Principlementioning

confidence: 99%

“…See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. [14], Y-branches [15] and multimode interference (MMI) couplers [16].…”

Section: Introductionmentioning

confidence: 99%

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

Priti

Liboiron-Ladouceur

2019

J. Lightwave Technol.

Self Cite

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“…The coupling and conversion of the modes is easy to achieve by the precise fabrication capability of the waveguide structure with the advanced CMOS fabrication techniques, and the device performance is quite stable. A library of functional devices for multimode on-chip optical communications has been developed on a silicon photonics platform, including optical modulators [18][19][20][21][22][23], mode multiplexers and demultiplexers [24][25][26][27][28][29][30][31][32][33][34][35][36], multimode waveguide crossings [37], multimode waveguide bends [38], and multimode optical switches [39][40][41][42][43][44]. Moreover, germanium photodetectors are available for on-chip integration [45][46][47].…”

Section: Introductionmentioning

confidence: 99%

WDM-compatible multimode optical switching system-on-chip

et al. 2019

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The development of optical interconnect techniques greatly expands the communication bandwidth and decreases the power consumption at the same time. It provides a prospective solution for both intra-chip and inter-chip links. Herein reported is an integrated wavelength-division multiplexing (WDM)-compatible multimode optical switching system-on-chip (SoC) for large-capacity optical switching among processors. The interfaces for the input and output of the processor signals are electrical, and the on-chip data transmission and switching process are optical. It includes silicon-based microring optical modulator arrays, mode multiplexers/de-multiplexers, optical switches, microring wavelength de-multiplexers and germanium-silicon high-speed photodetectors. By introducing external multi-wavelength laser sources, the SoC achieved the function of on-chip WDM and mode-division multiplexing (MDM) hybrid-signal data transmission and switching on a standard silicon photonics platform. As a proof of concept, signals with a 25 Gbps data rate are implemented on each microring modulator of the fabricated SoC. We illustrated 25 × 3 × 2 Gbps on-chip data throughput with two-by-two multimode switching functionality through implementing three wavelength-channels and two mode-channel hybrid-multiplexed signals for each multimode transmission waveguide. The architecture of the SoC is flexible to scale, both for the number of supported processors and the data throughput. The demonstration paves the way to a large-capacity multimode optical switching SoC.

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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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Mode selecting switch using multimode interference for on-chip optical interconnects

Cited by 35 publications

References 12 publications

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

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

WDM-compatible multimode optical switching system-on-chip

MEMS‐enabled Ultralow Power Consumption Programmable Arbitrary Order Mode Switch

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