High-contrast 40  Gb/s operation of a 500 μm long silicon carrier-depletion slow wave modulator

Brimont, A.; Thomson, David J.; Gardes, Frederic Y.; Fédéli, Jean Marc; Reed, Graham T.; Martí, J.; Sanchís, Pablo

doi:10.1364/ol.37.003504

Cited by 51 publications

(17 citation statements)

References 12 publications

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“…The exact reading of the actual n g is made difficult by the adiabatically-tapered shape, and further investigation is expected on this aspect. An asymmetric MZI configuration using a 2-mm-long delay line would have allowed a better reading of the n g number [16]. New device test structures including delay lines up to 2-mm-long are under fabrication for addressing this issue.…”

Section: -D Hcg Slow-waves Performancesmentioning

confidence: 99%

“…Previous works have shown that, by a better understanding of the mechanisms governing the slow-light phenomena in photonic crystal waveguides, optimized designs can achieve dispersion-free light slow-down over several nanometers bandwidths, thus widening the spectral window over which the slow-light propagation regime takes place and adding extended functionality to the device itself [11]- [13]. Moreover, slow-light waveguides has been used in the recent past to realize more compact and efficient horizontal p-n junction modulators into Mach-Zehnder interferometers (MZI) configuration on SOI [14] - [16].…”

Section: Introductionmentioning

confidence: 99%

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Low-loss adiabatically-tapered high-contrast gratings for slow-wave modulators on SOI

et al. 2015

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In this communication, we report about the design, fabrication, and testing of Silicon-based photonic integrated circuits (Si-PICs) including low-loss flat-band slow-light high-contrast-gratings (HCGs) waveguides at 1.31 μm. The light slowdown is achieved in 300-nm-thick silicon-on-insulator (SOI) rib waveguides by patterning adiabatically-tapered highcontrast gratings, capable of providing slow-light propagation with extremely low optical losses, back-scattering, and Fabry-Pérot noise. In detail, the one-dimensional (1-D) grating architecture is capable to provide band-edge group indices n g ~ 25, characterized by overall propagation losses equivalent to those of the index-like propagation regime (~ 1-2 dB/cm). Such photonic band-edge slow-light regime at low propagation losses is made possible by the adiabatic apodization of such 1-D HCGs, thus resulting in a win-win approach where light slow-down regime is reached without additional optical losses penalty. As well as that, a tailored apodization optimized via genetic algorithms allows the flattening of slow-light regime over the wavelength window of interest, therefore suiting well needs for group index stability for modulation purposes and non-linear effects generation. In conclusion, such architectures provide key features suitable for power-efficient high-speed modulators in silicon as well as an extremely low-loss building block for non-linear optics (NLO) which is now available in the Si photonics toolbox.

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Section: -D Hcg Slow-waves Performancesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-loss adiabatically-tapered high-contrast gratings for slow-wave modulators on SOI

et al. 2015

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“…In fact, slow light can provide enhancement of light-matter interaction in a way similar to optical resonators, but retaining the large bandwidth of traveling wave devices. Example applications are the realization of all-optical buffers and memories [3], or the enhancement in sensitivity of interferometers, for example in Mach-Zehnder modulators [4,5] or for sensing purposes [6,7].…”

Section: Introductionmentioning

confidence: 99%

Optimizing band-edge slow light in silicon-on-insulator waveguide gratings

et al. 2018

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A systematic analysis of photonic bands and group index in silicon grating waveguides is performed, in order to optimize band-edge slow-light behavior in integrated structures with low losses. A combination of numerical methods and perturbation theory is adopted. It is shown that a substantial increase of slow light bandwidth is achieved when decreasing the internal width of the waveguide and the silicon thickness in the cladding region. It is also observed that a reduction of the internal width does not undermine the performance of an adiabatic taper.

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“…Significant milestones have been achieved during recent years through the plasma dispersion effect although mostly for digital applications [8]- [20], but so far very little attention has been 0733-8724 © 2013 IEEE paid to analog applications. As mentioned above, high linearity is required for RF signal transmission.…”

mentioning

confidence: 99%

Analytical Model for Calculating the Nonlinear Distortion in Silicon-Based Electro-Optic Mach–Zehnder Modulators

Gutiérrez

Brimont

Herrera³

et al. 2013

J. Lightwave Technol.

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Abstract-In this study, an analytical model for calculating the nonlinear harmonic/intermodulation distortion for RF signals in silicon-based electro-optic modulators is investigated by considering the nonlinearity on the effective index change curve with the operation point and the device structure simultaneously. Distortion expressions are obtained and theoretical results are presented showing that optimal modulator parameters can be found to linearize it. Moreover, the harmonic distortion of a 1 mm silicon-based asymmetric MZI is RF characterized and used to corroborate the theoretical results. Based on the present model, the nonlinear distortion in terms of bias voltage or operating wavelength is calculated and validated by comparing with the experimental data, showing a good agreement between measurements and theory. Analog photonic link quality parameter like carrier-todistortion is one of the parameters that can be found with that model. Finally, the modulation depth is measured to assure that no over-modulation is produced.

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High-contrast 40 Gb/s operation of a 500 μm long silicon carrier-depletion slow wave modulator

Cited by 51 publications

References 12 publications

Low-loss adiabatically-tapered high-contrast gratings for slow-wave modulators on SOI

Low-loss adiabatically-tapered high-contrast gratings for slow-wave modulators on SOI

Optimizing band-edge slow light in silicon-on-insulator waveguide gratings

Analytical Model for Calculating the Nonlinear Distortion in Silicon-Based Electro-Optic Mach–Zehnder Modulators

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