Wing-Chau Ng, Ph.D.

Optical Systems Engineer

Ciena Corporation, Ottawa, Canada

Email: wing-chau.ng.1@ulaval.ca







 


  

_____________________________________________________________________________________

Education

Part-time student, Carleton University
- Life-long study

Master of Science, Carleton University, Ottawa, Canada, 2015~2017 (November)
- Applied Mathematics (Part-time)

Ph.D., Universite Laval, Quebec City, Canada, 2010~2015
- Research-based Thesis: Digital Signal Processing Algorithms in Single-Carrier Optical Coherent Communications
(Advisor: Leslie A. Rusch)

Novel Power Efficient DSP Architecture
Kalman Filter based Polarization State Tracking
Implementation of DSP algorithms for single-carrier 16 and 64-QAM in optical coherent detection
Parallellized Phase Tracking Algorithms with feedback delay
Characterization of Integrated Coherent Receiver and Laser Characterization
Interferometric techniques for measurement

Master of Applied Science, University of Toronto, 2008~2010

- Research-based Thesis: All-optical wavelength conversion in Aluminum Gallium Arsenide waveguides at telecommunications wavelengths (Advisors: Li Qian, Stewart Aitchison)

Bachelor of Engineering, the Chinese University of Hong Kong, 2003~2008
- Major in Electronic Engineering
- Minor in German Studies (language)
- 2005-2007: Exchange Student at Universität Karlsruhe, Germany.

Industrial Work Experience

System Engineer at Ciena, Ottawa, Canada, February 2015~present    

-Black-box (data-driven) predictive modelling
-Reverse engineering; re-generating theories
-Computational time reduction (coding-level or mapping/look-up table)
-Documentation and powepoint slides (as my strength and passion)

Capacity optimization in terrestrial optical networks via wavelength selective switches and amplified gains.
Implementation of non-Gaussian model (also called EGN) as nonlinear noise estimators (without sequential for-loops)
Extraction/characterization of modem card noise parameters
Link budget and test plan creation for WDM systems
Validation of optical performance of new hardware including ROADMs based on wavelength selective and multi-cast switches
Derivation of closed-form/approximated probability density functions of link PDL
Pure four-wave mixing (FWM) noise estimator
Fast estimators for nonlinear propagation noise in optical coherent WDM systems
Fiber nonlinearity physics   

Working student in Siemens AG, Germany (Bernd Kretzschmar’s group):

Testing the new version of the Siemens PCS7, December 2006~ August 2007

SKILLS

Programming Languages

Matlab (for my current job; object oriented programming), C++, Python, R, SAS, Linux

Data Science / Statistical Analysis (2015~present)

·         Basic data mining techniques: data visualization, dimensionality reduction, data reduction, unsupervised/supervised learning (Apriori algorithm, k-means clustering, k-nearest neighbours algorithm, neural networks, logistic regression, LDA, QDA etc.);

·         Implementation of deep neural networks (backpropagation algorithm);

·         Face recognition using principle component analysis and independent component analysis;

·         Sufficient foundation in statistics (from my Masters degree)

·         Currently participating in IBM Xprize, with a civil-engineering team called Sensequake situated in Montreal, Canada, responsible for processing large amount of measurement captured from sensors from various buildings in downtown Montreal, in an attempt to automate analysis and evaluation of the structural safety of buildings using artificial intelligence (AI) technology.

Digital Signal Processing and Modeling (2010~present):

·         Kalman filter, which made up one of the chapters in my PhD thesis;

·         5-year experience in implementing coherent detection system: capturing data from sampling scope, timing phase estimation (both time domain and frequency domain), frequency domain re-sampling, equalization of channel impairment such as MMSE-based pre-compensation, polarization mode dispersion (via LMS algorithm), frequency-domain chromatic dispersion, frequency-offset and phase-noise tracking and compensation;

·         All algorithms in a standard DSP textbook: John G. Proakis, Dimitris K Manolakis,  Digital Signal Processing: Principles, Algorithms and Applications, 3rd Edition;

·         All algorithms in a standard statistical signal processing textbook: Steven Kay, Fundamentals of Statistical Processing, Volume I: Estimation Theory, 1993;

·         Implementation of non-Gaussian model (also called EGN) as nonlinear noise estimators (without sequential for-loops) for optical coherent communications;

·         Split-step Fourier Method for fiber channel modelling;

·         Laser phase noise modelling (generation of Brownian and filtered Brownian motion);

·         Laser characterization using both coherent receiver and frequency discriminator;

·         Noise measurement based on power spectral density (PSD) of frequency noise, phase noise and field.

·         Monte Carlo simulation (bit-error counting) on transmission for single-carrier optical coherent communication system.

·         Matlab implementation of polarimetry, Jones-Stokes transformation, Poincare sphere;

·         Statistical analysis, considered as my personal strength and interest;

Laboratory/Instrumentation (2008~2014):

·         Real-time laboratory demonstration (visualization with Matlab interface) of Kalman-filter-based timing-phase recovery during Huawei inc. visit in 2014 at Universite Laval ,Quebec

·         6-year hands-on practice and instrumentation control on various equipments such as real-time sampling oscilloscopes, electrical/optical spectrum analysis, lock-in amplifiers, WDM laser sources, EDFAs, variable attenuators, polarization synthesizer and analyzer with National Instruments interfaces;

·         6-year hands-on optical fiber experiment

·         2-year hands on free-space optics experiment (light coupling into waveguides, linear/nonlinear characterization: Fabry-Perot based waveguide linear loss characterization, waveguide design using Lumerical and RSoft (beam propagation method, finite element method, finite-difference time-domain method);

·         Teaching assistants of 8 courses, mainly engaging in laboratory varying from electronic communications to optical communications;

 LIST OF PUBLICATIONS

Journal Papers:

1.    T.  Huynh, A. T. Nguyen, W.-C. Ng,  L. Nguyen, L. A. Rusch, and L. Barry,  "BER Performance of Coherent Optical Communications Systems employing Monolithic Tunable Lasers with Excess Phase Noise," IEEE J. Lightw. Technol., Vol. 32, No. 3, pp. 411 - 420 Feb. 2014.

2.    W. C. Ng, A. T. Nguyen, S. Ayotte, C. S. Park, and L. A. Rusch, “Impact of Sinusoidal Tones on Parallel Decision-Directed Phase Recovery for 64-QAM, ”  IEEE Photonics Letters Technology, Vol. 26, No. 5, pp. 486 – 489, Mar. 2014.

3.    W. C. Ng, A. T. Nguyen, S. Ayotte, C. S. Park, and L. A. Rusch, “Overcoming Phase Sensitivity in Real-time Parallel DSP for Optical Coherent Communications:  Optically Filtered Lasers,” IEEE J. Lightw. Technol., Vol. 32, No. 3, pp. 411 - 420 Feb. 2014.

4.    B. Filion, W. C. Ng, A.. T. Nguyen, L. A. Rusch and S. LaRochelle, “Wideband wavelength conversion of 16 Gbaud 16-QAM and 5 Gbaud 64-QAM signals in a semiconductor optical amplifier,” Optics Express, Vol. 21, Issue 17, pp. 19825-19833 (2013).

 

5.    K. Dolgaleva, W. C. Ng, L. Qian, J. S. Aitchison, M. Carla Camasta and Mark Sorel "Compact Highly-Nonlinear AlGaAs Waveguides for Efficient Wavelength Conversion", Optics Express, Vol. 19, pp. 12440-12455 (2011).

6.    K. Dolgaleva, W. C. Ng, L. Qian, J. S. Aitchison ,M. C. Camasta and M. Sorel "Broadband Self-Phase Modulation, Cross-Phase Modulation, and Four-Wave Mixing in 9-mm-long AlGaAs Waveguides",  Optics Letters, Vol. 35, Issue 24, pp. 4093-4095 (2010).

7.    A. D. Simard, N. Ayotte, Y. Painchaud, S. Bédard, and S. LaRochelle, " Impact of Sidewall Roughness on Integrated Bragg Gratings ,” IEEE J. Lightw. Technol., vol. 29, no. 24, pp. 3693–3704, Dec. 2011. (Personal tutoring on random processes, methodology and on derivation for equations (15) – (26), Appendix A and Appendix B).

 

Conference Papers:

8.    W. C. Ng, A. T. Nguyen, C. S. Park, and L. A. Rusch, “Enhancing Clock Tone via Polarization Pre-rotation: A Low-complexity, Extended Kalman Filter-based Approach,” Optical Fiber Communication Conference 2015, paper Th2A.19, March 2015.

 

9.    W. C. Ng, A. T. Nguyen, C. S. Park, and L. A. Rusch, “Reduction of MIMO-FIR Taps via SOP-Estimation in Stokes Space for 100 Gbps Short Reach Applications,” European Conference and Exhibition on Optical Communication, P.3.3, September, 2014.

10.  A. T. Nguyen, W. C. Ng, L. A. Rusch, “ An Optimized 16-QAM Constellation for Mitigating Impairments of Phase Noise and Limited Transmitter ENOB in Optical Coherent Detection Systems, ” European Conference and Exhibition on Optical Communication, Tu.1.3.5,September, 2014.

11.  W. C. Ng, A. T. Nguyen, S. Ayotte, C. S. Park, L. A. Rusch, “ Parallel and Pipelined Decision-Directed Phase Recovery for 64-QAM in the Presence of Sinusoidal Tones, ” Optical Fiber Communication Conference 2014, M2A.4, March, 2014.

12.  B. Filion , W. C. Ng , An T. Nguyen , L.A. Rusch  and S. LaRochelle , “ Wideband Wavelength Conversion of 5 Gbaud 64-QAM Signals in a Semiconductor Optical Amplifier, ” European Conference and Exhibition on Optical Communication, P.3.19, September, 2013.
  

13.  W. C. Ng, T. N. Huynh, A. T. Nguyen, S. Ayotte, C. S. Park, L. P. Barry  and L. A. Rusch, “Improvement due to Optically Filtered Lasers in Parallel Decision-Directed Phase Recovery for 16-QAM, ” The 10th Conference on Lasers and Electro-Optics Pacific Rim, and The 18th OptoElectronics and communications Conference / Photonics in Switching 2013 - OECC/PS, WR3-2, June 2013.

14.  T. Huynh, W. C. Ng, A. T. Nguyen, L. Nguyen, L. Rusch, and L.Barry, “Tracking Excess Noise from a Monolithic Tunable Laser in Coherent Communication Systems, ” Optical Fiber Communication Conference 2013, JW2A.46, March, 2013.

15.  W. C. Ng, A. T. Nguyen, S. Ayotte, C. S. Park, L. A. Rusch, “Optically-filtered Laser Source Enabling Improved Phase Tracking in Coherent Transmission Systems, ” European Conference and Exhibition on Optical Communication, P.3.15, September, 2012.
 

16.  W. C.  Ng,  Q.  Xu,  K. Dolgaleva, S. Doucet,  D. Lemus, P. Chrétien, W.  Zhu, L. A. Rusch,  S.  LaRochelle, L. Qian,  J. S. Aitchison, “Error-free 0.16pi-XPM-based All-Optical Wavelength Conversion in a 1-cm-long AlGaAs waveguide, ” Proc. 2010 IEEE Photonics Society Annual Meeting, pp. 54-55 , November, 2010.

17.  K. Dolgaleva, W. C. Ng, L. Qian, and J. S. Aitchison, “Efficient Self-Phase Modulation, Cross-Phase Modulation, and Four-Wave Mixing in AlGaAs Waveguides, ” Frontier in Optics 2010, FTuC5, October, 2010.

Teaching Experience

University of Toronto, 2010 (in English)
ECE110H, Fundamental Electrical (Laboratory)

Université Laval, 2011 – 2012 (in French)
GEL-7000 Processus aléatoires: méthodes d'étude et applications (Random processes)
GEL-4201 Communications optiques (Optical Communiations; laboratory)
GEL-4203 Optoélectronique (Optoelectronics)

Université Laval, 2013 (in French)
GEL-4201 Communications optiques (Optical Communiations; laboratory)
GEL-2000 Électromagnétisme (Electromagnetism)
GEL-3006 Systèmes de communications (Communication systems) (Laboratory)
GEL-7000 Processus aléatoires: méthodes d'étude et applications (Random processes)
GEL-7065 Independent Study : providing Matlab codes for research students for coherent communication system

 Languages

English, Chinese, French, German, Spanish

September 2017 –: Beginner Spanish, Carleton University (SPAN1010, Margarita Alfonso)
September 2013 – May 2014: Advanced French at Phoenix Center, Quebec (Karina Bar)
January - April 2012, Intermediate-Advanced French, Universite Laval (FLE-3221, Julie Pelletier)
September - December 2011, Intermediate French, Universite Laval (FLE-2314, Cécile Mariette)
September - December, 2009, English Scientific writing class, University of Toronto (Debby Repka)
September, 2006, German university entrance exam : Deutschsprache zur Hochschuleszugang (DSH) Niveau 2 (76%)

 

 Courses Taken

University of Toronto (2008-2009)
ECE1474H Fiber Lasers and Amplifiers
ECE527H1 Passive Photonics Devices
ECE1448H Quantum Mechanics
ECE1450H Photonics II (Ultrafast Photonics)
ECE525H1 Laser and Detectors

Université Laval (2010-2011)
GEL 7000 Random Processes
GEL 7014 Digital Communications
GEL 7066 Detection and Estimation

CMC Microsystems, University of Ottawa, |
Canada Silicon Nanophotonics Fabrication Graduate Course & ePIXfab Passives Training 2013 (Lukas Chrostowski, University of British Columbia).

Optical Fiber Conference 2014, San Francisco, USA
SC205: Integrated Electronic Circuits and Signal Processing for Fiber Optics (Y. K. Chen, Noriaki Kaneda; Bell Labs, Alcatel Lucent, USA); SC216 - An Introduction to Optical Network Design and Planning (Jane M. Simmons; Monarch Network Architects, USA);
SC314 - Hands-on Fiber Characterization for the Engineering of Long Haul and Metro Deployments (Daniel Peterson, Verizon, USA, Christine Tremblay, École de Technologie Supérieure, Univ. du Québec, Canada).

Carleton University (2015-present)
STAT5190 Mathematical Statistics I 
STAT5501 Mathematical Statistics II (Hypothesis Testing)
STAT5506 Robust Statistical Inference
MATH5408 Asymptotic Methods of Applied Mathematics (for differential equations)
STAT5504 Stochastic Processes and Time Series Analysis
MATH4703 Dynamical Systems
STAT5703 Data Mining
-Research project: Face recognition
- Final project: Implementation (in R) of data processing routines on biomedical data: visualization, dimensionality reduction, data reduction, unsupervised/supervised learning (Apriori algorithm, k-means clustering, k-nearest neighbours algorithm, neural networks, logistic regression, LDA, QDA etc.)
MATH5901 Advanced Data Mining (Directed Studies, by Prof. Shirley Mills)
Topic: GPU computing in autonomous cars
-Matlab implementation of deep neural networks via backpropagation algorithm.
-Convolutional neural network (for object detection)
STAT4502 Survey Sampling
SPAN1010 First-year Spanish

Music

·         Distinction (score: 138/150) in Grade 8 Piano (the Assocaiated Board of the Royal Schools of Music, 2001)

·         Performance level (Associate in Recital in Solo Piano, the International Examinations Board of Trinity College London, 2003)

·         Current instrument: Cello

Dance
Argentina Tango, Siempre Tango, Ottawa
Others: Bachata, Ballet, Salsa



 

© Copyright 2017, Wing-Chau Ng  |  Last updated: 21-09-2016

 

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