Silicon photonic coupled-ring resonator in nested configuration comprising different length scales

Shalaby, Rabab A.; Adib, George A.; Sabry, Yasser M.; Gad, Michael; Khalil, Diaa

doi:10.1109/icces48960.2019.9068163

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…A buried oxide (BOX) layer of SiO 2 of thickness t box = 2µm, separates the silicon waveguide from the silicon substrate. This design assures compatibility with the low-cost complementary-metal-oxidesemiconductor (CMOS) fabrication technology such as the multi-project-wafer (MPW) offered by IMEC [19,20,23,39].…”

Section: The Modulator Designmentioning

confidence: 99%

“…This allows a small bending radius, enabling high density of integration [17]. With so many features, a magnitude of research effort was poured into this direction and resulted in many effective designs of integrated components such as ring resonators [18][19][20][21], Mach-Zender interferometers (MZI) [22], interleavers [23], multi-mode interferometers (MMIs) [24], sensors [25][26][27], gyroscopes [28], Bragg-gratings [29], and fiber-grating couplers [30].…”

Section: Introductionmentioning

confidence: 99%

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Design of compact, high-speed and low-loss silicon-on-silica electro-optic modulators

Mahrous

Azmy

Afifi

et al. 2020

Semicond. Sci. Technol.

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Throughout a careful step-by-step study, two simple designs of electro-optic modulators are proposed. The study shows the effect of dimensions and doping concentration on the performance parameters such as the modulation bandwidth, the size, the insertion loss and the extinction ratio. One design shows a modulation bandwidth of 54.5 GHz with a relatively short phase shifter length of 2.5 mm, a low optical insertion loss of 1.1 dB and a very high extinction ratio of 30 dB. The other one shows a bandwidth of 12.8 GHz, a phase shifter length of 9 mm, an optical insertion loss of 3.3 dB and an extinction ratio of 3 dB. It is shown that these two designs can fit to the requirements of the 5G telecommunications networks at different points which require different speeds of operation. The designs feature the complementary-metaloxide-semiconductor technology advantages of ease and low-cost of fabrication.

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Section: The Modulator Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of compact, high-speed and low-loss silicon-on-silica electro-optic modulators

Mahrous

Azmy

Afifi

et al. 2020

Semicond. Sci. Technol.

Self Cite

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“…Complicated circuits grabbed more attention at a later stage. This includes optical crossing structures [16], spot size converters [17], vertical couplers [18], reflectors [19], polarization splitters [20], polarization rotators [21], filters [22][23][24], logic gates [25], modulators [26][27][28][29][30][31][32][33][34], sensors [35][36][37][38][39][40][41][42], light detection and ranging (LiDAR) devices [43], and gyroscopes [44]. A new trend in this field is enabling the silicon-photonics platform in the near-infrared (NIR) and the mid-infrared (MIR) ranges, despite material absorption losses [45][46][47].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Objective Genetic Algorithm Approach for Silicon Photonics Design

Mahrous,

Fedawy,

Abboud

et al. 2024

Photonics

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A multi-objective genetic algorithm approach is formulated to optimize the design of silicon-photonics complex circuits with contradicting performance metrics and no closed-form expression for the circuit performance. A case study is the interleaver/deinterleaver circuit which mixes/separates optical signals into/from different physical channels while preserving the wavelength-division-multiplexing specifications. These specifications are given as channel spacing of 50 GHz, channel 3-dB bandwidth of at least 20 GHz, channel free spectral range of 100 GHz, crosstalk of −23 dB or less, and signal dispersion less than 30 ps/nm. The essence of the proposed approach lies in the formulation of the fitness functions and the selection criteria to optimize the values of the three coupling coefficients, which govern the circuit performance, in order to accommodate the contradicting performance metrics of the circuit. The proposed approach achieves the optimal design in an incomparably short period of time when contrasted with the previous tedious design method based on employing Z-transform and visual inspection of the transmission poles and zeros.

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Tailoring the optical properties of polyvinyl alcohol-polyvinyl pyrrolidone based polymers

Gad,

Elkattan

2023

Opt Quant Electron

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In this work, new polymeric based films are fabricated and optically characterized. The new films include poly(vinyl alcohol), plain and blended with poly(vinyl pyrrolidone), comprising glycerin, and acetic acid,as additives. XRD and FTIR analysis were conducted to give insight into the structure of the films. The reflectance and transmittance for these films are measured in the UV–vis–NIR regions. Using these measurements, the refractive index, the permittivity and many other optical constants are retrieved. The results reveal that the fabricated films possess an extinction coefficient that is almost 3 times less, and a refractive index that is 0.1 higher than plain PVA in the telecommunications wavelength range. Besides, a noticeable increase in the refractive index of the films is achieved, up to 0.35 higher compared with silicon dioxide at the near infrared spectral region. Moreover, when compared to silicon and Germanium, in the ultraviolet and visible spectral region, a substantial reduction of 3 to 4 orders of magnitudes in extinction coefficient is achieved, in the favor of the investigated films. Interestingly, the films also show small dispersion over a wide range of wavelength. Therefore, the newly proposed films can be candidates for optoelectronics, solar cells, and integrated optics applications where high refractive index and low loss are desired for high density of fabrication.

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Silicon photonic coupled-ring resonator in nested configuration comprising different length scales

Cited by 3 publications

References 21 publications

Design of compact, high-speed and low-loss silicon-on-silica electro-optic modulators

Design of compact, high-speed and low-loss silicon-on-silica electro-optic modulators

A Multi-Objective Genetic Algorithm Approach for Silicon Photonics Design

Tailoring the optical properties of polyvinyl alcohol-polyvinyl pyrrolidone based polymers

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