University of Hong Kong, China

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General description

The Department of Electrical and Electronic Engineering was established at the University of Hong Kong in 1961.The field of Electrical and Electronic Engineering encompasses many exciting technologies such as electronics, computer systems, mobile communications, power systems, medical engineering, information systems, etc. which have been among the fastest growing and most challenging technologies that enable the development of the modern information-based society.

The Department has a wide range of research activities, grouped under five areas, namely (i) Biomedical Engineering, (ii) Communications and Networking Systems, (iii) Electronics and Optics, (iv) Energy Systems and Electric Vehicles, and (v) Signal Processing and Control Systems. There is also interdisciplinary research with other departments throughout the University. Our research activities are supported by government and industry research grants. Apart from basic research, our colleagues have been actively engaged in applied research and technology transfer.

Our research group, OMEGA HKU (Optical Management and Engineering Group @ HKU), advances the technological frontier of photonics systems and photonic signal processing technology to bring synergy among different applications. The basic premise is that with the photonic signal processor (PSP) we have proposed and demonstrated, the goal of this kind of platform is not simply to advance the state-of-the-art optical communication technologies, but to promote different research fields beyond. Along this theme, we have explored the applications of this kind of platform in the fields of microwave photonics, and recently biophotonics such as optical imaging systems; starting from fiber-based optical parametric oscillator (OPO) and then breathing laser as inertia-free swept source (BLISS). These novel photonic devices have been shown to be promising for different biomedical imaging technologies, such as ultrafast time-stretch microscopy, optical coherence tomography (OCT) and coherent anti-Stokes Raman scattering (CARS) spectroscopy. In addition to that, our expertise in the fiber nonlinearities equipped OMEGA HKU in proposing new imaging/measuring modalities, such as wavelength-encoded tomography (WET) and parametric spectral-temporal analyzer (PASTA), which also find interesting applications in capturing ultrafast dynamics and will further flourish in the near future.

 

Website – http://www.eee.hku.hk/, http://www.hku.hk/

Research Area 1

Fiber nonlinearities, photonic parametric processor

Contact person – Kenneth Kin-Yip Wong, kywong@eee.hku.hk

Research Area 2

Novel laser sources

Contact person – Kenneth Kin-Yip Wong, kywong@eee.hku.hk

Research Area 3

Ultrafast imaging tools

Contact person – Kenneth Kin-Yip Wong, kywong@eee.hku.hk

Publications of interest

Fiber nonlinearities, photonic parametric processor

  1. E. Marhic, K. K. Y. Wong, and L. G. Kazovsky, “Wideband Tuning of the Gain Spectra of One-Pump Fiber Optical Parametric Amplifiers,” IEEE J. on Selected Topics in Quantum Electronics, vol. 10, no. 5, pp. 1133-1141, Sept./Oct. 2004.
  2. K. Y. Wong, M. E. Marhic, K. Uesaka, and L. G. Kazovsky, “Polarization-Independent Two-Pump Fiber Optical Parametric Amplifier,” IEEE Photon. Technol. Lett., vol. 14, no. 7, pp. 911-913, July 2002.
  3. Uesaka, K. K. Y. Wong, M. E. Marhic, and L. G. Kazovsky, “Wavelength Exchange in a Highly Nonlinear Dispersion-Shifted Fiber: Theory and Experiments,” IEEE J. on Selected Topics in Quantum Electronics, vol. 8, no. 3, pp. 560-568, May/June 2002.
  4. K. Y. Wong, M. E. Marhic, K. Uesaka, and L. G. Kazovsky, “Polarization-Independent One-Pump Fiber Optical Parametric Amplifier,” IEEE Photon. Technol. Lett., vol. 14, no. 11, pp. 1506-1508, Nov. 2002.
  5. M. F. Lai, C. H. Kwok, and K. K. Y. Wong, “All-Optical Picoseconds Logic Gates based on a Fiber Optical Parametric Amplifier,” OSA Opt. Express, vol. 16, no. 22, pp. 18362–18370, 27 Oct. 2008.

Novel laser sources

  1. E. Marhic, K. K. Y. Wong, L. G. Kazovsky, and T. E. Tsai, “Continuous-Wave Fiber Optical Parametric Oscillator,” Opt. Lett., vol. 27, no. 16, pp. 1439-1441, Aug. 16, 2002.
  2. Yang, Y. Zhou, J. Li, and K. K. Y. Wong, “Actively Mode-Locked Fiber Optical Parametric Oscillator,” IEEE J. on Selected Topics in Quantum Electronics, vol. 15, no. 2, pp. 393-398, March/April 2009.
  3. Zhou, K. K. Y. Cheung, S. Yang, P. C. Chui, and K. K. Y. Wong, “Widely-tunable picosecond optical parametric oscillator using highly-nonlinear fiber,” Opt. Lett., vol. 34, no. 7, pp. 989–991, 1 Apr. 2009.
  4. Wei, A. K. S. Lau, T. T. W. Wong, C. Zhang, K. K. Tsia, and K. K. Y. Wong, “Coherent laser source for high frame-rate optical time-stretch microscopy at 1.0 µm,” IEEE J. on Selected Topics in Quantum Electronics, vol. 20, no. 5, 1100306, Sept/Oct. 2014.
  5. X. Wei, J. Xu, Y. Xu, L. Yu, J. Xu, B. Li, A. K. S. Lau, X. Wang, C. Zhang, K. K. Tsia, and K. K. Y. Wong, “Breathing laser as inertia-free swept source for ultrafast imaging,” Opt. Lett., vol. 39, no. 23, pp. 6593–6596, 1 Dec. 2014.

Ultrafast imaging tools

  1. Zhang, Y. Qiu, R. Zhu, K. K. Y. Wong, and K. K. Tsia, “Serial time-encoded amplified microscopy based on picosecond pulse source,” OSA Opt. Express, vol. 19, no. 17, pp. 15810-15816, 15 Aug. 2011.
  2. Zhu, J. Xu, C. Zhang, A. C. Chan, Q. Li, P. C. Chui, E. Y. Lam, and K. K. Y. Wong, “Dual-Band Time-Multiplexing Swept-Source OCT based on Optical Parametric Amplification,” IEEE J. on Selected Topics in Quantum Electronics, vol. 18, no. 4, pp. 1287–1292, July/August 2012.
  3. Zhang, J. Xu, P. C. Chui, and K. K. Y. Wong, “Parametric spectro-temporal analyzer (PASTA) for real-time optical spectrum observation,” Sci. Rep. 3, 2064; DOI:10.1038/srep02064 (2013).
  4. Xu, K. K. Y. Wong, C. Zhang, J. Xu, and K. K. Tsia, “Megahertz all-optical swept-source OCT based on broadband amplified optical time stretch,” Opt. Lett., vol. 39, no. 3, pp. 622–625, 1 Feb. 2014.
  5. C. Zhang and K. K. Y. Wong, “Wavelength-encoded tomography based on optical temporal Fourier transform,” Appl. Phys. Lett., 105, 091109 (2014).