Breakthroughs in Nonlinear Silicon Photonics 2011

Okawachi, Yoshitomo; Gaeta, Alexander L.; Lipson, Michal

doi:10.1109/jphot.2012.2189874

Cited by 11 publications

(3 citation statements)

References 47 publications

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“…In interferometric sensors, for example, where long waveguides are required [1], having low loss is important to guarantee that the output power of the sensor is high enough so as not to be affected by noise. Devices such as ring resonators or other types of cavities, used in nonlinear optics applications [2,3], modulators [4] and many others, require high quality factors achieved by reducing the overall propagation losses.…”

Section: Introductionmentioning

confidence: 99%

Study of the pedestal process for reducing sidewall scattering in photonic waveguides

Melo¹,

Alayo²,

Carvalho³

2017

Opt. Express

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In this work we investigate the principles of an alternative method for defining sidewall in optical waveguides fabricated using planar technology. The efficiency of this method is demonstrated through simulations and experimental results regarding propagation losses of a solid core ARROW waveguide fabricated on silicon substrate. It is well known that waveguides fabricated using sidewalls etched via Reactive Ion Etching (RIE) can present high sidewall roughness, especially if metallic hard-masks are used. This is largely responsible for the undesirable losses observed in these waveguides. The basic strategy of the proposed method is to do the etching step, in the fabrication of the waveguides, before the deposition of the core, so as to have the lower cladding layer and part of the silicon substrate etched away. Only after this, is the core of the waveguide deposited. This results in a waveguide sustained by a silicon pedestal. With this process, losses as low as 0.45 dB cm^-1 for multimode and 0.84 dB cm^-1 for single mode waveguides are obtained. The numerical simulations demonstrate that roughness in sidewalls implicates in propagation losses which are at least five times larger that those in the bulk of the material, thus corroborating the idea behind the proposed method.

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Section: Introductionmentioning

confidence: 99%

Study of the pedestal process for reducing sidewall scattering in photonic waveguides

Melo¹,

Alayo²,

Carvalho³

2017

Opt. Express

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“…Benefiting from its good optical confinement, large nonlinear coefficient, and easy integration with the complementary metal-oxide semiconductor (CMOS), silicon waveguides are desirable in the realization of all-optical signal processing on the chip scale. Significant works on the on-chip optical devices have already been reported, including parametric amplifier [1]- [3], Raman laser [4]- [7], broadband wavelength converter [8]- [10], and analog-to-digital converter [11]. In addition, modulation instability (MI) in which a weak perturbation of the amplitude or phase of a continuous wave (CW) or quasi-CW wave grows exponentially, has been studied in the silicon-based waveguide [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Strong Modulation Instability in a Silicon–Organic Hybrid Slot Waveguide

et al. 2015

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In this paper, we investigate the strong modulation instability (MI) at telecommunication band in a silicon-organic hybrid slot waveguide. The organic material of polymer poly (bis para-toluene sulfonate) of 2, 4-hexadiyne 1, 6 diol (PTS), which has high third-order nonlinear refractive index and very low two-photon absorption, is used to fill the slot of the waveguide. The optical gain can be up to $3600 m À1 with a low pump peak power of 300 mW. By using Gaussian pulses with width of 10 ps and peak power of 250 mW, deep modulation of the pump is achieved, and the ultrashort pulse trains with the periods of 27 and 24 fs are obtained in the anomalous and normal group-velocity dispersion regions, respectively.Index Terms: Modulation instability (MI), silicon-organic hybrid (SOH), slot waveguide, ultrashort pulse train.

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“…However, the extreme chemical inertness of KLTN, specific to densely packed perovskite stoichiometry, constitutes a central technological hurdle on the way towards realizing circuits of complexity, comparable to those achieved in the Silicon Photonics realm [12] by employing standard lithography using chemical etching techniques.…”

Section: Introductionmentioning

confidence: 99%

A Bragg grating embedded in a slab waveguide fabricated by the implantation of high-energy light ions in KLTN substrate

et al. 2013

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Electro-optically tunable transmission grating was imprinted in potassium lithium tantalate niobate by irreversible spatial patterning of the dielectric constant. While embedded into waveguided architecture, it provides a reliable and versatile building block for opto-electronic circuitry, capable of both active switching and multiplexing. Realization of such a block is critical for fabrication of integrated photonic circuits in electrooptic substrates by means of Refractive Index Engineering by fast ion implantation.

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Breakthroughs in Nonlinear Silicon Photonics 2011

Cited by 11 publications

References 47 publications

Study of the pedestal process for reducing sidewall scattering in photonic waveguides

Study of the pedestal process for reducing sidewall scattering in photonic waveguides

Strong Modulation Instability in a Silicon–Organic Hybrid Slot Waveguide

A Bragg grating embedded in a slab waveguide fabricated by the implantation of high-energy light ions in KLTN substrate

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