Silicon-Nitride-Assisted Edge Coupler Interfacing With High Numerical Aperture Fiber

Wang, Xiaodong; Quan, Xueling; Liu, Min; Cheng, Xiulan

doi:10.1109/lpt.2019.2895095

Cited by 33 publications

(16 citation statements)

References 22 publications

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“…Due to the low coupling losses of single-edge couplers, a cut-back method is usually applied in the testing of edge couplers to measure the coupling efficiency [26,68,108] assisted with multiple auxiliary sets of ultra-long straight waveguides and bends to acquire accurate experimental results. In some situations, fiber array can be customized to place at one facet or both facets to ease the alignment issue.…”

Section: An Overall Overview Of Edge Coupler Performancementioning

confidence: 99%

“…Although N-H and Si-H bonds absorption exists in the C-band, it can be avoided by choosing LPCVD instead of PECVD. Thirdly, SiN can support high optical power and is less sensitive to thermal change compared with Si, which means that it is possible to integrate active devices into a silicon photonic platform with the aid of SiN [108].…”

Section: Multilayer Silicon Nitride-on-silicon Photonic Integrated Plmentioning

confidence: 99%

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Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Cheng

et al. 2020

Applied Sciences

149

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Silicon photonics has drawn increasing attention in the past few decades and is a promising key technology for future daily applications due to its various merits including ultra-low cost, high integration density owing to the high refractive index of silicon, and compatibility with current semiconductor fabrication process. Optical interconnects is an important issue in silicon photonic integrated circuits for transmitting light, and fiber-to-chip optical interconnects is vital in application scenarios such as data centers and optical transmission systems. There are mainly two categories of fiber-to-chip optical coupling: off-plane coupling and in-plane coupling. Grating couplers work under the former category, while edge couplers function as in-plane coupling. In this paper, we mainly focus on edge couplers in silicon photonic integrated circuits. We deliver an introduction to the research background, operation mechanisms, and design principles of silicon photonic edge couplers. The state-of-the-art of edge couplers is reviewed according to the different structural configurations of the device, while identifying the performance, fabrication feasibility, and applications. In addition, a brief comparison between edge couplers and grating couplers is conducted. Packaging issues are also discussed, and several prospective techniques for further improvements of edge couplers are proposed.

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Section: An Overall Overview Of Edge Coupler Performancementioning

confidence: 99%

Section: Multilayer Silicon Nitride-on-silicon Photonic Integrated Plmentioning

confidence: 99%

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Cheng

et al. 2020

Applied Sciences

149

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“…It is important to note that the selected device performances were for Si and Si 3 N 4 components that follow similar designs to the AlGaAsOI components that are relevant and routinely used for QPICs. For example, sub-edge couplers with 0.35 dB of loss have been fabricated using silicon with silicon nitride, but these were achieved with multiple layers 58 . Here we compare similar component designs across the three platforms-using only a single photonic layer and standard photolithography to fabricate the devices.…”

Section: Discussionmentioning

confidence: 99%

Expanding the Quantum Photonic Toolbox in AlGaAsOI

Castro,

Steiner,

Thiel

et al. 2022

Preprint

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Aluminum gallium arsenide-on-insulator (AlGaAsOI) exhibits large χ (2) and χ (3) optical nonlinearities, a wide tunable bandgap, low waveguide propagation loss, and a large thermo-optic coefficient, making it an exciting platform for integrated quantum photonics. With ultrabright sources of quantum light established in AlGaAsOI, the next step is to develop the critical building blocks for chip-scale quantum photonic circuits. Here we expand the quantum photonic toolbox for AlGaAsOI by demonstrating edge couplers, 3-dB splitters, tunable interferometers, and waveguide crossings with performance comparable to or exceeding silicon and silicon-nitride quantum photonic platforms. As a demonstration, we demultiplex photonic qubits through an unbalanced interferometer, paving the route toward ultraefficient and high-rate chip-scale demonstrations of photonic quantum computation and information applications.

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“…The high fiber-to-chip test loss was mainly caused by the high edge coupling loss, which was over 5 dB for each end. It can be further optimized by designing trident spot-size converter (SSC) [30] combining three misplaced tapers or other high-efficiency couplers with air trenches [31].…”

Section: Discussionmentioning

confidence: 99%

Single-photon non-reciprocity with an integrated magneto-optical isolator

Ren¹,

Yan²,

Feng³

et al. 2021

Preprint

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Non-reciprocal photonic devices are essential components of classical optical information processing. It is interesting and important to investigate their feasibility in the quantum world. In this work, a single-photon non-reciprocal dynamical transmission experiment was performed with an on-chip silicon nitride (SiN)-based magneto-optical (MO) isolator. The measured isolation ratio for single photons achieved was 12.33 dB, consistent with the result of classical test, which proved the functionality of our on-chip isolator. The quantum coherence of the passing single photons was further verified using high-visibility quantum interference. Our work will promote on-chip nonreciprocal photonic devices within the integrated quantum circuits and help introduce novel phenomena in quantum information processes.

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Silicon-Nitride-Assisted Edge Coupler Interfacing With High Numerical Aperture Fiber

Cited by 33 publications

References 22 publications

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Expanding the Quantum Photonic Toolbox in AlGaAsOI

Single-photon non-reciprocity with an integrated magneto-optical isolator

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