Invited Advanced Photonics Workshop under IEEE TENCON 2022 (, which is the flagship general conference of IEEE in Region 10 and the major event of IEEE HK section 50TH ANNIVERSARY)

(Room S422, 09:00-17:30, 3 Nov 2022)

Presider: Changyuan YU, The Hong Kong Polytechnic University

P.0Welcome remarks
Wei JIN, Acting Director of Photonics Research Institute, The Hong Kong Polytechnic University
P.1F5G-Advanced and Evolution towards F6G (Keynote)
Xiang LIU, Huawei
Abstract: With the fiber-to-everywhere vision, the European Telecommunications Standards Institute (ETSI) established in 2020 an industry specification group (ISG) dedicated to the definition and specification of the 5th generation fixed network (F5G). Since then, the first release of 14 use cases and the second release of 18 use cases have been conceived and published. More recently, ETSI has published a white paper on F5G-Advanced and Beyond, aiming to reach deeper to final access points via optical fiber to better support a fully connected, intelligent world with high bandwidth, high reliability, low latency, and low energy consumption. In this invited talk, a timely update on the new progresses made on F5G-Advanced will be provided. Future evolution towards F6G will also be discussed.
Coffee Break
P.2Rapid and Label-free Histological Imaging
Terence WONG, Hong Kong University of Science and Technology
Abstract: Rapid and high-resolution histological imaging with minimal tissue preparation has been a challenging yet captivating medical pursuit. In the advancement of biophotonics, a promising and transformative histological imaging method was recently proposed, termed computational high-throughput autofluorescence microscopy by pattern illumination (CHAMP). With the assistance of computational microscopy and deep learning, Deep-CHAMP enables histology-equivalent image generation of label-free and unprocessed tissues with high throughput, demonstrating its great potential as an assistive imaging platform for surgeons and pathologists to provide optimal adjuvant treatment.
P.3High Spatiotemporal Resolution Quantitative Phase Microscopy for Biomedical Imaging and Material Metrology Applications
Renjie ZHOU, The Chinese University of Hong Kong
Abstract: Quantitative phase microscopy (QPM) is a label-free imaging technique which has found many promising applications in biomedical imaging and material metrology. In this talk, I will first introduce our development of high spatiotemporal resolution synthetic aperture phase microscopy that can image and quantify millisecond-level fluctuations in living cells. I will further introduce our work on high-speed tomographic phase microscopy and its applications on high-speed three-dimensional (3D) cell imaging and characterization of 3D-printed structures. After that, I will present our recent work on developing single-frame label-free cell tomography with an unprecedented speed of >10,000 volumes/second. Finally, I will present our results on pushing the phase sensitivity limit to ~2 picometers, which has laid the foundation to develop quantitative phase profilometry for mapping the thickness maps of 2D materials.
P.4Shining focused light into deep tissue with wavefront shaping
Puxiang LAI, The Hong Kong Polytechnic University
Abstract: The usage of light has considerably reshaped the landscape of biomedicine in the past decades from imaging, sensing, treatment, stimulation, to control. The applications, however, are limited to superficial layers beneath sample surface or compromised resolution at depths due to the inherent nature of strong optical scattering in tis-sue. Many approaches have been proposed to tackle this challenge, such as switching to longer wavelengths to have lower tissue scattering coefficients, converting diffused light into not-so-scattered sound at the signal detection side, etc. In this talk, we will introduce wavefront shaping, a strategy of suppressing scattering by pre-compensating the scattering-induced phase distortions, to achieve noninvasive or minimally invasive optical focusing at depths in tissue. We will present the basics of working principle and our continuing endeavors in the field. Challenges and roadmaps towards in vivo deep-tissue applications will also be discussed.
P.5Lithium niobate photonic integrated circuits for future optical and microwave links
Cheng WANG, City University of Hong Kong
Abstract: As global IT traffic continues to grow at double-digit annual rates, the underlining hardware in contemporary optical and wireless networks is facing increasing challenges in the footprint, power consumption and cost. Photonic integrated circuits could address these challenges by simultaneously integrating many optical components on a single photonic chip. Among various photonic material platforms, lithium niobate (LN) is a particularly attractive candidate due to its strong electro-optic effect, wide transparency window and low optical loss. While LN has been widely deployed in the telecommunications industry for decades, the material has long been perceived as one that cannot be integrated due to difficulties associated with its nanofabrication. In this talk, I will first discuss our efforts in LN device fabrication techniques that have enabled thin-film LN devices and circuits that simultaneously feature sub-wavelength light confinement, low propagation loss and wafer-scale fabrication capability. Based on this platform, we have demonstrated a series of high-performance integrated photonic components, including electro-optic modulators with CMOS-compatible drive voltages and electro-optic bandwidths covering the entire millimeter-wave band, ring-assisted Mach-Zehnder modulators with ultrahigh linearity, broadband power-efficient frequency-comb generation, as well as efficient wavelength converters. The excellent device performances, together with the low optical loss and wafer-scale processes, could enable a variety of applications in future intra- and inter-datacenter optical links, microwave and millimeter-wave photonics, analog and neuromorphic optical computation, as well as quantum information processing systems.
Lunch Break
P.6Plasmon-Enhanced Solar Photocatalysis using Gold Nanostructures
Xuming ZHANG, The Hong Kong Polytechnic University
Plasmon-enhanced photocatalysis is a promising approach for solar-to-chemical energy conversion. In comparison to isolated or disordered metal nanostructures, plasmonic nanostructure arrays with coupling architectures can afford strong broadband light-harvesting capability, efficient charge transfer, enhanced local electromagnetic field, and large contact interface by controlling the morphology, composition, size, spacing, and dispersion of individual nanocomponents. In this talk, we will present our studies on different plasmonic nanostructures for enhanced solar photocatalytic applications, including organic degradation, photocurrent generation and total water splitting. Basically, we have combined the Au nanohole arrays (AuNHAs) with thin TiO2 layers to form different TiO2/AuNHA nanocomposites, which enable the combined effect of various plasmonic enhancement modes such as multi-scattering, hot electron injection (HEI), plasmon-induced resonant energy transfer (PIRET) and local electromagnetic field (LEMF). Our studies have shown that plasmonic enhancement is very effective for optical redox-based applications.
P.7Optical Imaging and Transmission through Complex Media
Wen CHEN, The Hong Kong Polytechnic University
Abstract: In recent years, single-pixel optical imaging and transmission have attracted much attention. In this invited talk, our current research work about optical imaging and transmission with single-pixel detection in complex scenarios is presented. We provide evidence that the theoretical description about optical systems based on spatially correlated beams is still incomplete and cannot work in complex scenarios. The theories, characteristics and performance of the proposed optical imaging and transmission with single-pixel detection in complex scenarios are discussed, and it is also illustrated that the rectified algorithms can work well for optical imaging and transmission with single-pixel detection in complex scenarios.
P.8Reprioritize imaging speed based on multiplexed microscopy
Kevin TSIA, The University of Hong Kong
Abstract: This talk will cover the latest technologies, based on FACED imaging, that could allow researchers to reprioritize imaging speed and throughput in advanced optical microscopy which is especially used for capturing fast dynamic biological processes and large-scale interrogation of cells tissues or even organisms.
Coffee Break
P.9Enabling coherent digital signal processing technologies for 400ZR pluggables and beyond
Bo Zhang, Marvell, USA
Abstract: Coherent optical communication technologies went from power-hungry line cards to small form factor pluggable modules that can now match the size of a client optical module. This talk covers the evolution of standardization journey of the cornerstone 400ZR and the enabling coherent DSP and optical technologies that support beyond 400G efforts.
P.10Application of Machine Learning in Optical Communications and Networks
Alan P.T. LAU, The Hong Kong Polytechnic University
Abstract:Machine Learning (ML) applications in optical communications and networking are gaining more attention in recent years. We review recent ML advances in nonlinear transmissions, optical performance monitoring (OPM) and cross-layer optimizations for future low-margin dynamic mesh networks.