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Variability Aware Design

Research Area: Design and Modeling for Integrated Photonics, Large-scale Photonic Integration, Silicon Photonics Process Technology

Main Researcher: Yufei Xing

What is the problem with variability in photonics?

- large sensitivity
- different contributions to variability (processing, temperatures)
- different scales (die, wafer, batch)

Many components will all have slight deviations, which will impact the performance and yield of the entire circuit

Variability of individual components will impact the yield of the circuit
Variability of individual components will impact the yield of the circuit

Approach:

- Monte Carlo
- Smarter models based on Stochastic CollocationSC or PCE

PDF and CDF of the coupling coefficient for wavelength at 1.55 μm obtained by means of the SC model and MC model, respectively.
PDF and CDF of the coupling coefficient for wavelength at 1.55 μm obtained by means of the SC model and MC model, respectively.

An example:

A Directional Coupler has its waveguide width and thickness varied by a random distribution. It field coupling coefficient is a random variable. SC saves computation cost drastically by replacing the simulation model (Fimmwave Modesolver) with a cheap stochastic model (analytical expression).

Comparison of performance and time consumption of the SC with the MC method.
Comparison of performance and time consumption of the SC with the MC method.

Other people involved:

Related Research Projects

Publications

    International Journals

  1. A. Kaintura, D. Spina, I. Couckuyt, L.Knockaert, W. Bogaerts, T. Dhaene, A Kriging and Stochastic Collocation ensemble for uncertainty quantification in engineering applications, Engineering with Computers, p.1-15 (2017)  Download this Publication (2.5MB).
  2. A. Li, W. Bogaerts, Fundamental Suppression of Backscattering in Silicon Microrings, Optics Express, (2017)  Download this Publication (2.5MB).
  3. Y. Xing, D. Spina, A. Li, T. Dhaene, W. Bogaerts, Stochastic Collocation for Device-level Variability Analysis in Integrated Photonics, Photonics Research, (2016)  Download this Publication (782KB).
  4. W. Bogaerts, M. Fiers, P. Dumon, Design Challenges in Silicon Photonics, J. Sel. Top. Quantum Electron., 20(4), p.1-8 (2014)  Download this Publication (363KB).
  5. M. Fiers, E. Lambert, S. Pathak, P. Dumon, B. Maes, P. Bienstman, W. Bogaerts, Improving the design cycle for nanophotonic components, Journal of Computational Science, 4(5), p.313-324 (2013)  Download this Publication (2.9MB).
      International Conferences

    1. W. Bogaerts, Scaling Up Silicon Photonic Circuits: Where Are the Challenges?, International Workshop on Optical/Photonic Interconnects for Computing Systems (OPTICS Workshop) (invited), 3, Switzerland, (2017)  Download this Publication (275KB).
    2. W. Bogaerts, Challenges for Designing Large-scale Integrated Photonics, European Conference on Integrated Optics (ECIO) / Workshop on Optical Waveguide Theory an Numerical Modeling (OWTNM) (invited), Poland, p.OWTNM-I-01 (2016)  Download this Publication (268KB).
    3. Y. Xing, D. Spina, A. Li, T. Dhaene, W. Bogaerts, Variability analysis of device-level photonics using stochastic collocation , SPIE Photonics Europe 2016, Belgium, (2016)  Download this Publication (112KB).
    4. W. Bogaerts, Silicon Photonics: Designing for Complexity, HiPEAC Computing Systems Week (invited), Italy, (2015).

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