Three-mode synthesis of slab Gaussian beam in ultra-low-loss in-plane nanophotonic silicon waveguide crossing

Dumais, Patrick; Goodwill, Dominic; Celo, D.; Jiang, Jiaren; Bernier, Éric

doi:10.1109/group4.2017.8082214

Cited by 18 publications

(19 citation statements)

References 7 publications

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“…Another method to fulfill the phase difference requirements between the two lowest even modes is to employ three cascaded multimode tapers, and the insertion loss is 0.13 dB and the crosstalk is −43.5 dB at the footprint of 4.16 × 4.16 µm 2 [38], as shown in Figure 3b. The symmetric MMI crossing supporting TE 0 , TE 2 and TE 4 modes with wider MMI waveguides and the synthesized Gaussian-like focusing pattern mode has an extremely low insertion loss of 0.007 dB ± 0.004 dB and crosstalk of <−40 dB at a footprint of 30 × 30 µm 2 [39]. The low-loss Bloch waves can be viewed as the combination of the multimode self-focusing property with the matching of the field pattern and dielectric structure periodicities, which have low insertion loss of 0.045 dB and crosstalk of −34 dB [40].…”

Section: Multimode Interference Methodsmentioning

confidence: 99%

State-of-the-Art and Perspectives on Silicon Waveguide Crossings: A Review

Cheng

et al. 2020

Micromachines

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In the past few decades, silicon photonics has witnessed a ramp-up of investment in both research and industry. As a basic building block, silicon waveguide crossing is inevitable for dense silicon photonic integrated circuits and efficient crossing designs will greatly improve the performance of photonic devices with multiple crossings. In this paper, we focus on the state-of-the-art and perspectives on silicon waveguide crossings. It reviews several classical structures in silicon waveguide crossing design, such as shaped taper, multimode interference, subwavelength grating, holey subwavelength grating and vertical directional coupler by forward or inverse design method. In addition, we introduce some emerging research directions in crossing design including polarization-division-multiplexing and mode-division-multiplexing technologies.

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Section: Multimode Interference Methodsmentioning

confidence: 99%

State-of-the-Art and Perspectives on Silicon Waveguide Crossings: A Review

Cheng

et al. 2020

Micromachines

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“…An insertion loss of 0.02 dB [95] and 0.04 dB [28] were achieved with a fully-etched and shallow-etched waveguide, respectively. We presented a waveguide crossing (Figure 7b) with the ultralow loss of 0.007 dB and an ultralow crosstalk of −40 dB based on the three-mode synthesis of a 1-D Gaussian beam [96]. Recently, a monolithically integrated multilayer silicon nitride-on-silicon waveguide crossing (Figure 7c) was proposed [97,98] with insertion loss as low as 0.003 dB and crosstalk of −56 dB using the low-pressure-chemical-vapor-deposition (LPCVD) silicon nitride layer on SOI wafers.…”

Section: Key Technologies Of Silicon Photonic Switch Fabricsmentioning

confidence: 99%

State of the Art and Perspectives on Silicon Photonic Switches

Song

Huang

et al. 2019

Micromachines

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In the last decade, silicon photonic switches are increasingly believed to be potential candidates for replacing the electrical switches in the applications of telecommunication networks, data center and high-throughput computing, due to their low power consumption (Picojoules per bit), large bandwidth (Terabits per second) and high-level integration (Square millimeters per port). This review paper focuses on the state of the art and our perspectives on silicon photonic switching technologies. It starts with a review of three types of fundamental switch engines, i.e., Mach-Zehnder interferometer, micro-ring resonator and micro-electro-mechanical-system actuated waveguide coupler. The working mechanisms are introduced and the key specifications such as insertion loss, crosstalk, switching time, footprint and power consumption are evaluated. Then it is followed by the discussion on the prototype of large-scale silicon photonic fabrics, which are based on the configuration of above-mentioned switch engines. In addition, the key technologies, such as topological architecture, passive components and optoelectronic packaging, to improve the overall performance are summarized. Finally, the critical challenges that might hamper the silicon photonic switching technologies transferring from proof-of-concept in lab to commercialization are also discussed.

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“…One particular obstacle for this is that most PIC technologies only support a single waveguide layer, and therefore need to introduce engineered waveguide crossings to connect nontrivial circuit topologies. [68], [69].…”

Section: Circuit Layout Generationmentioning

confidence: 99%

Photonic Integrated Circuit Design in a Foundry+Fabless Ecosystem

Khan

Xing

et al. 2019

IEEE J. Select. Topics Quantum Electron.

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A foundry-based photonic ecosystem is expected to become necessary with increasing demand and adoption of photonics for commercial products. To make foundry-enabled photonics a real success, the photonic circuit design flow should adopt known concepts from analog and mixed signal electronics. Based on the similarities and differences between the existing photonic and the standardized electronics design flow, we project the needs and evolution of the photonic design flow, such as schematic driven design, accurate behavioral models, and yield prediction in the presence of fabrication variability.

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Three-mode synthesis of slab Gaussian beam in ultra-low-loss in-plane nanophotonic silicon waveguide crossing

Cited by 18 publications

References 7 publications

State-of-the-Art and Perspectives on Silicon Waveguide Crossings: A Review

State-of-the-Art and Perspectives on Silicon Waveguide Crossings: A Review

State of the Art and Perspectives on Silicon Photonic Switches

Photonic Integrated Circuit Design in a Foundry+Fabless Ecosystem

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