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

Mahrous, Hany; Azmy, Mina; Afifi, Ahmed; AbouElainain, Abdallh; Kotb, Amr; Fedawy, Mostafa; Fikry, W.; Gad, Michael; Selim, Dalia

doi:10.1088/1361-6641/ab9d09

Cited by 7 publications

(3 citation statements)

References 50 publications

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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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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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“…These key parameters have been determined for the conventional phase modulators such as the Silicon-based phase modulators [9][10][11][12] and Lithium niobate (LiNbO 3 ) phase modulator [13,14] among others.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide/Nanocrystalline Cellulose Composite: A Facile Phase Modulator

Ollengo

2023

Univers. J. Carbon Res.

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In the past few years, graphene and graphene-based materials have received enormous interest from the scientific community due to their extraordinary mechanical, electronic, optical and electrochemical properties. The success of graphene applications highly motivates the exploration of other applications such as in designing of antennas, phase modulation, as a frequency multiplier, design of graphene-based Field Effect Transistors, its use as an electrode in batteries and as a supercapacitor. In this paper, we present the Graphene Oxide/ Nanocrystalline cellulose (GO/NCC) composite material experimental phase modulation investigation. The modulator produced a 0.2πᶜ phase shift and the temporal profile obtained. The insertion loss at an ideal voltage of 2V and the extinction ratio was determined to be 15.17 dB at 25MHz and 12.22 dB respectively. The 0.2πᶜ phase shift demonstrated by GO/NCC implies that it can be used in phase shift keying, specifically, in Off-set quadrature phase-shift keying modulation where a phase change of not greater than π/2 radians at a time is required.

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“…As the basic unit of optical communication (1), the optical phase shifter plays an important role in phase dimension adjustment (2,3). Especially in the structural design of optical devices, the deviation of the processing size accuracy will cause the optical signal to deviate during the propagation process, particularly for some A c c e p t e d M a n u s c r i p t devices that strictly require the interference of the optical signal, the phase shifter is extremely important.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of diamond mid-infrared phase shifter

Chen

Zhi

et al. 2021

Functional Diamond

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Herein, the mid-infrared (7.7-13.7 μm) diamond-based phase shifter was designed and optimized by finite-element analysis. The ridge-shaped diamond waveguide is designed and doped to form the internal p-n structure, and the internal carrier distribution is changed by applying forward and reverse voltages to change the effective refractive index to achieve the effect of π-phase shift. The results show that when p-doping concentration is 4×10 17 cm-3 and n doping concentration is 1×10 18 cm-3 , upon the reverse voltage (8 V) is applied, the change of the real part of effective refractive index (ΔR) is 1.6×10-5 , and the length of the phase shifter (L) required to realize the π-phase shift is 241 mm; upon the forward voltage (-8 V) is applied, ΔR increases to 3.2×10-4 , and the length of the phase shifter required is shortened to 12.03 mm. Such a short length is relatively easy in industrial production. In order to make the refractive index distribution more uniform, the carrier concentration has been optimized as 1×10 17 cm-3 for p-type and 4×10 17 cm-3 for n-type, respectively.

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

Cited by 7 publications

References 50 publications

A Multi-Objective Genetic Algorithm Approach for Silicon Photonics Design

A Multi-Objective Genetic Algorithm Approach for Silicon Photonics Design

Graphene Oxide/Nanocrystalline Cellulose Composite: A Facile Phase Modulator

Design and optimization of diamond mid-infrared phase shifter

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