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Prof. dr. ir. Yanlu Li (Professor)
This person is working in this group since 2008.
Yanlu Li is a part-time professor at Ghent University and a staff member at imec. He received a bachelor's degree in applied physics from Dalian University of Technology in 2006 and the Erasmus Mundus Master's degree of Science in Photonics from Universiteit Gent, Vrije Universiteit Brussel, University of St Andrews, Heroit-Watt University and Kungliga Tekniska Hogskolan (KTH)in 2008. He obtained his Ph.D. in Photonics at Universiteit Gent, where his research topic was to realize a miniaturized Laser Doppler Vibrometer (LDV) integrated on a silicon photonics platform.
He has been involved in several research projects related to LDV, including H2020 CARDIS, H2020 InSiDe, and H2020 PhotonicLEAP.
His research interest is in photonic integrated circuit techniques used for non-contact and non-destructive sensing and imaging in various applications, including biomedical sensing and imaging, structural health monitoring, and non-destructive testing for materials and structures.Specific Research Topics
Current Postdoctoral Researchers
Current PhD Students
Patents-
E. Dieussaert, R. Baets, Y. Li,
Photonic integrated circuit for multiple frequency shifting of light
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Y. Li, R. Baets, E.M.P. Ryckeboer, J. Zhu,
Speckle mitigation
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R. Baets, D. Vermeulen, Y. Li, Y. De Koninck,
Integrated Photonics Waveguide Grating Coupler
Publications (65)International Journals
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S. Badhwar, L. Marais, H. Khettab, F. Poli, Y. Li, P. Segers, S. Aasmul, M. de Melis, R. Baets, S. Greenwald, R.-M. Bruno, P. Boutouyrie,
Clinical validation of carotid-femoral pulse wave velocity measurement using a multi-beam laser vibrometer: the CARDIS study, Hypertension, 81(9), p.1-10 doi:10.1161/HYPERTENSIONAHA.124.22729 (2024) .
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Y. Li, E. Dieussaert,
A Compensation Method for Nonlinearity Errors in Optical Interferometry, Sensors, 23(18), p.7942 doi:10.3390/s23187942 (2023) .
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E. Dieussaert, R. Baets, Y. Li,
On-chip multi-beam frequency shifter through sideband separation, Optics Express, 31(18), p.29213-29227 doi:10.1364/OE.498792 (2023) .
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Y. Li, Claudio Bellani, N.A Yebo, Jolien Dendooven, Jin Won Seo, Christophe Detavernier, R. Baets, Johan A. Martens, Sreeprasanth Pulinthanathu Sree,
Nanoporous Silica-Alumina Films Fabricated on Silicon Photonic Chips for Selective Ammonia Sensing, ACS Applied Nano Materials, 5(11), p.16126-16135 doi:10.1021/acsanm.2c02741 (2022) .
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Y. Li, E. Dieussaert, R. Baets,
Miniaturization of Laser Doppler vibrometers - a review, Sensors, 22, p.4735 doi:10.3390/s22134735 (2022) .
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Silvia Seoni, Simeon Beeckman, Y. Li, Soren Aasmul, Umberto Morbiducci, R. Baets, Pierre Boutouyrie, Filippo Molinari, Nilesh Madhu, Patrick Segers,
Template matching and Matrix Profile for Signal Quality Assessment of Carotid and Femoral Laser Doppler Vibrometer Signals, Frontiers in Physiology, 12, p.775052 doi:10.3389/fphys.2021.775052 (2022) .
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Y. Li, R. Baets,
Nonlinear signal errors in homodyne laser Doppler vibrometry induced by strong second-order ghost reflections and their mitigation, Optics Express, 29(6), p.8283 - 8295 doi:10.1364/OE.418439 (2021) .
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Y. Li, L. Marais, H. Khettab, Z. Quan, S. Aasmul, R. Leinders, R. Schuler, P. Morrissey, S. Greenwald, P. Segers, M. Vanslembrouck, R. Bruno, P. Boutouyrie, P. O'Brien, M. de Melis, R. Baets,
Silicon photonics-based laser Doppler vibrometer array for carotid-femoral pulse wave velocity (PWV) measurement, Biomedical Optics Express, 11(7), p.3913-3926 doi:10.1364/BOE.394921 (2020) .
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L. Marais, H. Khettab, Y. Li, P. Segers, R. Baets, K. Reesink, S. Aasmul, M. De Melis, P. Boutouyrie,
Measurement of Aortic Stiffness By Laser Doppler Vibrometry: THE CARDIS STUDY, Journal of Hypertension, 37, p.e88 doi:10.1097/01.hjh.0000570292.62996.dd (2019) .
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V. Mancini, D. Tommasin, Y. Li, J. Reeves, R. Baets, S. Greenwald, P. Segers,
Detecting carotid stenosis from skin vibrations using Laser Doppler Vibrometry : an in-vitro proof-of-concept, PLOS ONE, 14(6), p.e0218317 doi:10.1371/journal.pone.0218317 (2019) .
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B. Ouyang, Y. Li, M. Kruidhof, R. Horsten, K. Van Dongen, J. Caro,
On-chip silicon Mach-Zehnder interferometer sensor for ultrasound detection, Optics Letters, 44(8), p.1928-1931 doi:10.1364/ol.44.001928 (2019) .
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J. Zhu, Y. Li, R. Baets,
Mitigation of speckle noise in laser Doppler vibrometry by using a scanning average method, Optics Letters, 44(7), p.1860-1863 doi:10.1364/ol.44.001860 (2019).
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Y. Li, J. Zhu, M. Duperron, P. O'Brien, R. Schuler, S. Aasmul, M. De Melis, M. Kersemans, R. Baets,
Six-beam homodyne laser Doppler vibrometry based on silicon photonics technology, Optics Express, 26(3), p.3638-3645 doi:10.1364/oe.26.003638 (2018) .
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Y. Zhu, J. Wang, W. Xie, B. Tian, Y. Li, E. Brainis, Yuqing Jiao, D. Van Thourhout,
Ultra-Compact Silicon Nitride Grating Coupler for Microscopy Systems, Optics Express, 25(26), p.33297-33304 doi:10.1364/oe.25.033297 (2017) .
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J. Zhang, Y. Li, S. Dhoore, G. Morthier, G. Roelkens,
Unidirectional, widely-tunable and narrow-linewidth heterogeneously integrated III-V-on-silicon laser, Optics Express, 25(6), United States, p.7092-7100 doi:10.1364/OE.25.007092 (2017) .
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A. Rahim, E.M.P. Ryckeboer, A. Subramanian, S. Clemmen, B. Kuyken, A. Raza, A. Hermans, M. Muneeb, S. Dhoore, Y. Li, U.D. Dave, P. Bienstman, N. Le Thomas, G. Roelkens, D. Van Thourhout, P. Helin, S. Severi, X. Rottenberg, R. Baets,
Expanding the Silicon Photonics Portfolio with Silicon Nitride Photonic Integrated Circuits, Journal of Lightwave Technology (invited), 35(4), p.639-649 doi:10.1109/JLT.2016.2617624 (2017) .
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Y. Li, P. Segers, J. Dirckx, R. Baets,
On-chip laser Doppler vibrometer for arterial pulse wave velocity measurement, Biomedical Optics Express, 4(7), p.1229-1235 doi:10.1364/boe.4.001229 (2013) .
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Y. Li, R. Baets,
Homodyne laser Doppler vibrometer on silicon-on-insulator with integrated 90 degree optical hybrids, Optics Express, 21(11), p.13342-13350 doi:10.1364/oe.21.013342 (2013) .
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Y. Li, L. Li, B. Tian, G. Roelkens, R. Baets,
Reflectionless tilted grating couplers with improved coupling efficiency based on a silicon overlay, Photonics Technology Letters, 25(13), p.1195-1198 doi:10.1109/LPT.2013.2261484 (2013) .
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Y. Li, S. Verstuyft, G. Yurtsever, S. Keyvaninia, G. Roelkens, D. Van Thourhout, R. Baets,
Heterodyne laser Doppler vibrometers integrated on silicon-on-insulator with thermo-optic based frequency shifters, Applied Optics, 52(10), p.2145-2152 doi:10.1364/AO.52.002145 (2013) .
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Y. Li, D. Vermeulen, Y. De Koninck, G. Yurtsever, G. Roelkens, R. Baets,
Compact grating couplers on silicon-on-insulator with reduced backreflection, Optics Letters, 37(21), p.4356-4358 doi:10.1364/ol.37.004356 (2012) .
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D. Vermeulen, Y. De Koninck, Y. Li, W. Bogaerts, R. Baets, G. Roelkens,
Reflectionless grating couplers for SOI photonic integrated circuits , Optics Express, p.22278-22283 doi:10.1364/OE.20.022278 (2012) .
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H. Yu, M. Pantouvaki, J. Van Campenhout, D. Korn, K. Komorowska, P. Dumon, Y. Li, P. Verheyen, P. Absil, L. Alloatti, D. Hillerkuss, J. Leuthold, R. Baets, W. Bogaerts,
Performance tradeoff between lateral and interdigitated doping patterns for high speed carrier-depletion based silicon modulators, Optics express, 20(12), p.12926-12938 doi:10.1364/oe.20.012926 (2012) .
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L. Wang, Y. Li, M. Porcel, D. Vermeulen, X. Han, J. Wang, X. Jian, R. Baets, M. Zhao, G. Morthier,
A polymer-based surface grating coupler with an embedded Si3N4 layer, Journal of Applied Physics, 111(11), p.114507 doi:10.1063/1.4724335 (2012) .
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Y. Li, S. Meersman, R. Baets,
Realization of fiber based laser Doppler vibrometer with serrodyne frequency shifting, Applied Optics, 50(17), p.2809-2814 doi:10.1364/ao.50.002809 (2011) .
International Conferences
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Y. Li, E. Dieussaert, M. Ghomashi, R. Baets,
Silicon photonics-based laser Doppler vibrometer array for non-contact photoacoustic imaging, International Conference on Nano-photonics and Nano-optoelectronics, Japan, p.ICNN5-01 (2024).
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E. Dieussaert, R. Baets, Y. Li,
Scaling Silicon Photonics-based Laser Doppler Vibrometry with Multi-Beam Frequency Shifters, 2024 IEEE Silicon Photonics Conference (SiPhotonics), Japan, p.1-2 doi:10.1109/SiPhotonics60897.2024.10543570 (2024) .
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S. Beeckman, Y. Li, S. Aasmul, N. Madhu, S. Bhadwar, R.-M. Bruno, P. Boutouyrie, P. Segers,
Measuring carotid-femoral pulse-wave velocity with real-time laser-doppler vibrometry, Artery 2023 Conference, Germany, (2023) .
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M. Ghomashi, R. Baets, Y. Li,
Design and Optimizing Backside Grating Couplers in Si-Photonics Circuits, 2023 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD), Italy, doi:10.1109/NUSOD59562.2023.10273523 (2023).
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Simoen Beeckman, Y. Li, Soren Aasmul, R. Baets, Pierre Boutouyrie, Patrick Segers, Nilesh Madhu,
Enhancing Multichannel Laser-Doppler Vibrometry Signals with Application to (Carotid-Femoral) Pulse Transit Time Estimation, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Australia, (2023).
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E. Dieussaert, X. Rottenberg, R. Baets, Y. Li,
Miniature and non-contact photoacoustic system using silicon photonics based Laser Doppler Vibrometer and compact excitation source, European Conference on Integrated Optics, Netherlands, (2023) .
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Z. Yang, Y. Li, R. Baets,
Theoretical comparison of the signal-to-noise ratios of two types of vibrometers: Mach-Zehnder and Sagnac interferometers , Measuring by light, Netherlands, (2023) .
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Y. Li, Soren Aasmul, R. Baets,
Development of multi-beam laser Doppler vibrometer for cardiovascular disease monitoring and diagnosis, Measuring by Light, Netherlands, (2023).
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E. Dieussaert, R. Baets, Y. Li,
Silicon photonics-based Laser Doppler Vibrometer for non-contact photoacoustic sensing, Proc. SPIE 12425, Smart Photonic and Optoelectronic Integrated Circuits 2023, 12425, United States, p.124250C doi:10.1117/12.2648991 (2023) .
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Y. Li, Soren Aasmul, Andrei Bakoz, Chirag Murendranath Patil, Padraic E. Morrissey, Tracy Wotherspoon, Owen Pullin, Felix Campano Casado, Petr Zaruba, R. Baets,
Laser Doppler vibrometry sensors implemented in a silicon photonic integrated circuit for measuring cardiovascular signals on bare skin, Proc. SPIE 12355, Diagnostic and Therapeutic Applications of Light in Cardiology 2023, 12355, United States, p.1235507 doi:10.1117/12.2648832 (2023) .
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Z. Yang, E. Dieussaert, R. Baets, Y. Li,
Comparison between Laser Doppler and Sagnacbased vibrometers from the view of velocity noise density, IEEE Benelux Photonics Chapter - Annual Symposium 2022, Netherlands, p.78-81 (2022) .
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E. Dieussaert, R. Baets, Y. Li,
Proposal for non-contact photoacoustics using silicon photonics-based Laser Doppler Vibrometers, IEEE Benelux Photonics Chapter - Annual Symposium 2022, Netherlands, p.poster 41 (2022) .
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E. Dieussaert, Y. Li, G. Morthier, R. Baets,
Influence of optical amplifiers for on-chip homodyne laser Doppler vibrometers, Journal of Physics: Conference series, 2041, Italy, p.012005 doi:10.1088/1742-6596/2041/1/012005 (2021) .
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Y. Li, S. Aasmul, P. Morrissey, D. Carey, T. Wotherspoon, P. Zaruba, R. Baets,
Optimization of multi-beam silicon photonics based laser Doppler vibrometry for measuring cardiovascular signals on bare skin, Photonics West BiOS, 11621, p.116210A doi:10.1117/12.2577159 (2021) .
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L. Marais, H. Khettab, Y. Li, P. Segers, R. Baets, K. Reesink, S. Aasmul, M. De Melis, P. Boutouyrie,
2.6 Validation of the Measurement of Aortic Stiffness by the CARDIS Laser Doppler Vibrometer, Artery Research, 25(1), p.S15-S15 doi:10.2991/artres.k.191224.011 (2020) .
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B. Ouyang, Y. Li, M. Kruidhof, R. Horsten, R. Baets, K.W.A. van Dongen, J. Caro,
Highly sensitive silicon Mach-Zehnder interferometer based ultrasound sensor, SPIE Photonics West Conference, 11283, United States, p.paper 112830R1 (9 pages) doi:10.1117/12.2539573 (2020) .
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R. Baets, Y. Li,
Silicon photonics enabled laser doppler vibrometry and its application in cardiovascular medicine, Optimess 2019, (2019) .
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D. Tommasin, Y. Li, J. Reeves, R. Baets, S. Greenwald, P. Sergers,
P168 Feasibility study of local pulse wave velocity estimation in the carotid artery with multi-beam Laser Doppler vibrometer, Artery Research, 24(C), p.129 - 130 doi:10.1016/j.artres.2018.10.221 (2018) .
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L. Marais, S. Aasmul, R. Baets, M. De Melis, S. Greenwald, H. Khettab, Y. Li, F. Prinzen, K. Reesink, P. Segers, P. Boutouyrie,
P51 Non-contact measurement of local carotid and carotid-femoral pulse wave velocity by laser Doppler vibrometry: validation of a new device against reference techniques in hypertensive patients, Artery Research, 24(C), p.93-93 doi:10.1016/j.artres.2018.10.104 (2018) .
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V. Mancini, D. Tommasin, Y. Li, R. Baets, S. Greenwald, P. Sergers,
4.4 Can laser Doppler vibrometer detect carotid stenosis from skin vibrations? Hydraulic bench tests on patient-specific model, Artery Research, 24(C), p.76-76 doi:10.1016/j.artres.2018.10.043 (2018).
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R. Baets, Y. Li,
Medical device applications of silicon photonics., European Optical Society Biennial Meeting (EOSAM) 2018 (invited), Netherlands, (2018) .
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R. Baets, Y. Li,
Medical device applications of silicon photonics, Frontiers in Optics (FiO) 2018 (invited), United States, (2018).
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V. Mancini, D. Tommasin, Y. Li, R. Baets, S. Greenwald, P. Segers,
Detecting carotid stenosis from skin vibrations: proof-of-principle from hydraulic bench tests on a compliant stenotic carotid bifurcation model, World Conference Biomechanics, Ireland, (2018) .
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Y. Li, J. Zhu, M. Duperron, P. O'Brien, R. Schuler, S. Aasmul, M. De Melis, R. Baets,
Speckle mitigation in laser Doppler vibrometry based on a compact silicon photonics chip, Conference on Lasers and Electro-Optics, United States, p.1-2 doi:10.1364/cleo_at.2018.atu3i.5 (2018).
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Y. Li, S. Greenwald, D. Tommasin, J. Zhu, P. Segers, S. Aasmul, M. de Melis, M. Duperron, P. O'Brien, R. Schuler, R. Baets,
Non-invasive cardiovascular disease assessment with miniaturized multi-beam laser Doppler vibrometry, Biophotonics Congress: Biomedical Optics Congress 2018, United States, p.CW4B.7 doi:10.1364/translational.2018.cw4b.7 (2018).
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M. Duperron, L. Carroll, M. Rensing, S. Collins, Y. Zhao, Y. Li, R. Baets, P. O'Brien,
Hybrid integration of laser source on silicon photonic integrated circuit for low-cost interferometry medical device, Proc. SPIE 10109, Optical Interconnects XVII, 10109, United States, p.1010915 (17 Pages) doi:10.1117/12.2250921 (2017) .
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Y. Li, M. Vanslembrouck, R. Baets,
Two-way-fed silicon-on-insulator grating couplers with a broad bandwidth, Advanced Photonics 2016 (IPR, NOMA, Sensors, Networks, SPPCom, SOF), Canada, p.ITu1B.5 doi:10.1364/iprsn.2016.itu1b.5 (2016) .
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T. Spuesens, Y. Li, P. Verheyen, G. Lepage, S. Balakrishnan, P. Absil, R. Baets,
Integrated Optical Frequency Shifter on a Silicon Platform, Conference on Lasers and Electro-Optics, OSA Technical Digest (online) (Optical Society of America, 2016), paper SF2G.1., United States, United States, p.paper SF2G.1 doi:10.1364/CLEO_SI.2016.SF2G.1 (2016) .
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W. Bogaerts, Y. Li, S. Pathak, A. Ruocco, M. Fiers, A. Ribeiro, E. Lambert, P. Dumon,
Integrated design for integrated photonics: from the physical to the circuit level and back , Proc. SPIE 8781, Integrated Optics: Physics and Simulations (invited), Czech Republic, p.878102 doi:10.1117/12.2017761 (2013) .
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L. Li, Y. Li, G. Morthier,
Properties of shallowly etched second order grating in silicon-on-insulator (SOI) waveguide, 2013 Annual Workshop of the IEEE Photonics Benelux Chapter, Belgium, p.23-24 (2013) .
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G. Roelkens, D. Vermeulen, Y. Li, Y. De Koninck, S. Selvaraja, K. Van Acoleyen, D. Van Thourhout, R. Baets,
Silicon grating structures for optical fiber interfacing and III-V/silicon opto-electronic components, SPIE Photonics West Conference 2013 - High Contrast Metastructures II (invited), 8633, United States, p.86330S doi:10.1117/12.2001289 (2013) .
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Y. Li, S. Verstuyft, G. Yurtsever, S. Keyvaninia, G. Roelkens, D. Van Thourhout, R. Baets,
Miniaturized laser Doppler vibrometers integrated on silicon-on-insulator with thermo-optic serrodyne optical frequency shifter, 9th International Conference on Group IV Photonics, United States, p.219-221 doi:10.1109/group4.2012.6324139 (2012) .
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Y. Li, R. Baets,
Single-channel laser Doppler vibrometers integrated on silicon-on-insulator (SOI), Proceedings of the 5th international conference on optical measurement techniques for structures & systems (OPTIMESS2012), Belgium, p.235 (2012) .
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Y. Li, D. Vermeulen, Y. De Koninck, G. Yurtsever, G. Roelkens, R. Baets,
Fiber couplers for silicon-on-insulator photonic IC's with optimized on-chip return loss, Optical Fiber Communication Conference (OFC) 2012, p.JTh2A.8 (2012) .
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L. Wang, Y. Li, M. Porcel, D. Vermeulen, X. Han, J. Wang, X. Jian, M. Zhao, G. Morthier,
Grating couplers in polymer with a thin Si3N4 layer embeded, SPIE Photonics West 2012, 8258, United States, p.825817-1~7 doi:10.1117/12.908553 (2012) .
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Y. Li, R. Baets,
Improved multi-mode interferometers (MMIs) on silicon-on-insulator with the optimized return loss and isolation, Proceedings of the 2011 annual symposium of the IEEE Photonics Benelux Chapter, p.205-208 (2011) .
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D. Vermeulen, Y. De Koninck, Y. Li, E. Lambert, W. Bogaerts, R. Baets, G. Roelkens,
Reflectionless Grating Coupling for Silicon-on-Insulator Integrated Circuits, 8th International Conference in Group IV Photonics 2011, United Kingdom, p.74-76 (P1.6) doi:10.1109/group4.2011.6053720 (2011) .
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Y. Li, S. Meersman, R. Baets,
Optical frequency shifter on SOI using thermo-optic serrodyne modulation, 2010 7th IEEE International conference on group IV photonics, China, p.75-77 doi:10.1109/group4.2010.5643423 (2010) .
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Y. Li, R. Baets,
Miniaturized laser doppler velocimeters (LDVs) integrated on silicon-on-insulator (SOI), Proceedings of the 2009 Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, p.97-100 (2009) .
National Conferences
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Y. Li,
Miniaturized laser doppler velocimeters (LDVs) integrated on silicon-on-insulator (SOI), 10e Ugent-Firw Doctoraatssympoisum , Belgium, (2009) .
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