High-speed delay tuning of slow light in pin-diode-incorporated photonic crystal waveguide

Hayakawa, Ritsuko; Ishikura, Norihiro; Nguyen, Hong C.; Baba, Toshihiko

doi:10.1364/ol.38.002680

Cited by 13 publications

(8 citation statements)

References 22 publications

(35 reference statements)

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“…The working principle of a tunable delay line is simple: a PhC waveguide supports both fast (n g of approximately 5) and slow light regions. An external tuning mechanism, such as thermal tuning [32,34], electrical tuning [34] or ultrafast, adiabatic frequency tuning [33] can then be used to select which of these regions a signal pulse will experience and therefore the time taken to travel through the device.…”

Section: Phc Delay Line Designmentioning

confidence: 99%

Multi-objective constrained design of nickel-base superalloys using data mining- and thermodynamics-driven genetic algorithms

Menou

Ramstein

Bertrand

et al. 2016

Modelling Simul. Mater. Sci. Eng.

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Photonic crystal(PhC) waveguides are used for a wide range of applications with diverse performance metrics. A waveguide optimised for one application may not be suitable for others and no one-size-fits-all solution exists. Therefore each application requires a specialised waveguide design, a computationally and time intensive process. Here, we present a hybrid, multi-objective optimisation routine for PhC waveguides, to efficiently guide the device design. The algorithm can be configured to optimise for a wide range of performance metrics and applications. We demonstrate optimisations for three different applications: slow light performance, propagation loss due to fabrication disorder and delay line applications. For each optimisation target, our routine quickly finds practical waveguide designs (<48 h, on a laptop computer) that match or exceed the performance of state-of-the-art devices designed by the community over the last 10 years. This is also the first time that scattering loss from fabrication disorder has been incorporated into an optimisation algorithm, ensuring realistic predictions of a PhC waveguide design's practical performance.

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Section: Phc Delay Line Designmentioning

confidence: 99%

Multi-objective constrained design of nickel-base superalloys using data mining- and thermodynamics-driven genetic algorithms

Menou

Ramstein

Bertrand

et al. 2016

Modelling Simul. Mater. Sci. Eng.

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“…Control and tuning delays of slow light photonic crystal Si waveguides are discussed in Refs. [20,21]. Active spectral filtering by Si Bragg grating, nano-beam resonator and p-i-n junctions are demonstrated in Refs.…”

Section: Introductionmentioning

confidence: 99%

Characterization of geometry and depleting carrier dependence of active silicon waveguide in tailoring optical properties

et al. 2017

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Changes in refractive index and the corresponding changes in the characteristics of an optical waveguide in enabling propagation of light are the basis for many modern silicon photonic devices. Optical properties of these active nanoscale waveguides are sensitive to the little changes in geometry, external injection/biasing, and doping profiles, and can be crucial in design and manufacturing processes. This paper brings the active silicon waveguide for complete characterization of various distinctive guiding parameters, including perturbation in real and imaginary refractive index, mode loss, group velocity dispersion, and bending loss, which can be instrumental in developing optimal design specifications for various application-centric active silicon waveguides.

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“…Si photonics is a fascinating platform that enables not only large-scale photonic integration on a silicon-on-insulator (SOI) wafer with high uniformity and reproducibility but also low-cost mass production via a CMOS-compatible process. We have studied an Si PCW fabricated by such a process and its slow-light generation, demonstrating tunable delays [13,14] and a TPA-PD [15] at telecom wavelengths. In this study, we propose and demonstrate an on-chip optical correlator in which the two basic components are integrated monolithically.…”

Section: Introductionmentioning

confidence: 99%

“…A heater was integrated into the reference branch for phase tuning, where the change of the delay by the heating was negligible. In a delay scanner based on a lattice-shifted photonic crystal waveguide (LSPCW) [13][14][15][16], the delay is scanned by integrated heaters integrated beside the LSPCW. This delay scanner is followed by a LSPCW dispersion controller operated by other heaters.…”

Section: Introductionmentioning

confidence: 99%

One-chip integration of optical correlator based on slow-light devices

Kinugasa¹,

Ishikura²,

Ito³

et al. 2015

Opt. Express

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We propose and demonstrate an on-chip optical correlator, in which two types of photonic crystal slow-light waveguides are integrated and operated as an optical delay scanner and a two-photon-absorption photodetector. The footprint of the device, which was fabricated using a CMOS-compatible process, was 1.0 × 0.3 mm(2), which is substantially smaller than that of conventional optical correlators with free-space optics. We observed optical pulses using this device and confirmed the correspondence of pulse waveforms with those observed using a commercial correlator when the pulse width was 5-7 ps. This device will achieve one-chipping of an optical correlator and related measurement instruments.

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High-speed delay tuning of slow light in pin-diode-incorporated photonic crystal waveguide

Cited by 13 publications

References 22 publications

Multi-objective constrained design of nickel-base superalloys using data mining- and thermodynamics-driven genetic algorithms

Multi-objective constrained design of nickel-base superalloys using data mining- and thermodynamics-driven genetic algorithms

Characterization of geometry and depleting carrier dependence of active silicon waveguide in tailoring optical properties

One-chip integration of optical correlator based on slow-light devices

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