Enhanced Q-factor and effective length silicon photonics filter utilizing nested ring resonators

Selim, Mahmoud A; Anwar, Momen

doi:10.1088/2040-8986/acf5fd

Cited by 4 publications

(3 citation statements)

References 36 publications

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“…What has motivated these efforts is their ability to confine the light to a certain volume by virtue of a multilayer structure or total internal reflection. Moreover, optical cavities enable myriad applications such as temperature and pressure [1,2], gas sensors [3,4], refractive index sensors [5,6], spectroscopy [7][8][9], and on-chip filters [10], to mention a few. Additionally, multilayer configurations are exploited in liquid crystal display, augmented reality, and virtual reality [11,12].…”

Section: Introductionmentioning

confidence: 99%

Modeling and characterization of deeply etched multilayer resonators under partial coherent excitation via multimode optical fibers

A Selim,

Sabry,

Marty

et al. 2024

J. Opt.

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Recently, there has been a resurgence of interest in multimode optical fibers illuminated by a white light source. Largely, in anticipation of many integrated applications in the biomedical domain and spectral sensing benefiting from the broad spectral range and high numerical aperture. Along these lines, the output light from these fibers can be captured by the physics of partially coherent sources. While the Gaussian Schell model has provided a framework for studying partial coherence, to our knowledge, its impact on microstructures remains unexplored. As the sheer complexity arising from the interplay between partial coherence and microstructures transfer function has posed fundamental challenges in deciphering their response. In this work, we introduce a comprehensive numerical model paired with experimental validation to assess the performance of multilayer optical resonators, which are meticulously crafted through high aspect ratio silicon etching under the influence of a partially coherent optical source. The model studies the effects of optical fiber numerical aperture, Bragg mirror order, cavity length, and surface roughness of the microstructures on the output of the resonator. The results show that the response under standard multimode fiber (partial coherent source) has lower insertion loss, more asymmetry versus wavelength, and larger full width at half maximum (FWHM) than the standard single mode fiber (full coherent source). A silicon-on-insulator chip is fabricated using 130-µm deep etching of silicon for Bragg mirrors with 2.25, 3, and 3.25 µm silicon layer widths and a different number of layers. The structures are characterized using a multimode fiber of 62.5-µm core diameter illuminated by an infrared white light source. The theoretical results have been compared with the experimental results and a good agreement has been obtained.

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Section: Introductionmentioning

confidence: 99%

Modeling and characterization of deeply etched multilayer resonators under partial coherent excitation via multimode optical fibers

A Selim,

Sabry,

Marty

et al. 2024

J. Opt.

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show abstract

“…The presence of several resonators in the RBS design improves its filtering properties. Meanwhile, the topologies of dividers and couplers with nested [21] and cascade-arranged microrings [22] are also reported, which increase the sensitivity of the device.…”

Section: Introductionmentioning

confidence: 99%

Design of Photonic Molecule-Based Multiway Beam Splitter/Coupler with Variable Division Ratio

Geints

2024

Photonics

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An optical beam splitter is used for dividing an input optical beam into several separate beams with a specific power ratio. Usually, conventional optical beam splitters have bulky dimensions (many optical wavelengths) and a fixed dividing ratio, which significantly limit the design of new miniaturized optical devices and integrated optical circuits. We propose and investigate in detail a novel physical concept of a highly miniaturized (up to two working wavelengths) planar optical resonant splitter/coupler with a switching element comprising a photonic molecule (PM) pair dispersing input optical fluxes in multiple directions with a tailored power ratio. The structural design of the proposed splitter is based on a silicon-on-insulator (SOI) platform and composed of high-quality resonators in the form of electromagnetically coupled submicron-sized microcylinders. The control on the power division ratio and the selection of optical beam directions is realized by tuning the photonic splitter structure to the corresponding resonance of the PM supermode. Compared to known analogs, the proposed design is easy and cheap in fabrication. Because of its tiny dimensions, it is suitable for integration into a “System-on-a-chip” platform and can dynamically change the beam power division ratio by input wave-phase manipulation.

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“…The presence of several resonators in the RBS design improves its filtering properties. At the same time, the topologies of dividers and couplers with nested [21] and cascade-arranged microrings [22] are also reported, which possess increased sensitivity of the whole device.…”

mentioning

confidence: 99%

Design of Photonic-Molecule-Based Multiway Beam Splitter/Coupler with Variable Division Ratio

Geints

2023

Preprint

View full text Add to dashboard Cite

Optical beam splitter is used for dividing an input optical beam into several separate beams with specific power ratio. Usually, conventional beam splitters have bulky dimensions and fixed dividing ratio which significantly limit the design of new miniaturized optical devices and integrated optical circuits. We propose and investigate a novel physical concept of a miniaturized planar optical splitter/coupler with a switching element in the form of a photonic molecule (PM) pair dispersing input optical fluxes along multiple ways with variable power proportions. The structural design of the proposed splitter is based on a silicon-on-insulator (SOI) platform and composed of high-quality resonators in the form of electromagnetically coupled submicron-sized microcylinders. The control on the power division ratio and the selection of optical beam directions is realized by tuning the photonic splitter structure to the corresponding resonance of PM supermode. Compared to known analogues, the proposed design is easy to fabricate, suitable for integration into a "System-on-a-chip" platform and can dynamically change the beam power division ratio by input wave-phase manipulation.

show abstract

Enhanced Q-factor and effective length silicon photonics filter utilizing nested ring resonators

Cited by 4 publications

References 36 publications

Modeling and characterization of deeply etched multilayer resonators under partial coherent excitation via multimode optical fibers

Modeling and characterization of deeply etched multilayer resonators under partial coherent excitation via multimode optical fibers

Design of Photonic Molecule-Based Multiway Beam Splitter/Coupler with Variable Division Ratio

Design of Photonic-Molecule-Based Multiway Beam Splitter/Coupler with Variable Division Ratio

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