Plenary Talk 1:

Wenqing Liu

AIOFM, Hefei Institutes of Physical Science, CAS

Title: TBD

Abstract：TBD

Biography:

Wenqing Liu, Academician of the Chinese Academy of Engineering, is Professor and Chair of the Academic Committee of the Hefei Institutes of Physical Science, Chinese Academy of Sciences, and Academic Director of the Anhui Institute of Optics and Fine Mechanics. He also serves as Vice President of the Chinese Society for Environmental Sciences, Vice President of the Chinese Optical Society, and Vice President of the China Instrument and Control Society. His research focuses on environmental monitoring technology and applications: he has developed new methods for environmental optical monitoring, pioneered a new field of environmental optics in China, developed a series of environmental monitoring instruments and brought them to industrialization, and integrated and demonstrated a three-dimensional (space–air–ground) atmospheric pollution monitoring system. He has received three Second Prizes of the National Science and Technology Progress Award and five First Prizes of provincial and ministerial science and technology awards, as well as the Anhui Provincial Major Science and Technology Achievement Award (2012), the Ho Leung Ho Lee Foundation Prize for Scientific and Technological Progress (2016), and the title of National Advanced Worker (2020).

Plenary Talk 2:

Oleg Dubovik

CNRS, University of Lille

Title: Explorations of novel satellite observations and their synergy for advanced aerosol characterization

Abstract：

This presentation discusses the exploration of novel observations from recently launched satellite instruments and their synergies. First, it aims to demonstrate the enhanced value of information regarding columnar aerosol properties derived from the advanced capabilities of Multi-Angle Polarimeters (MAPs). MAP measurements are widely considered the most suitable passive satellite observations for monitoring atmospheric aerosols. They offer enhanced sensitivity not only to aerosol abundance but also to aerosol absorption, particle type, morphology, and shape. Although the use of polarimetry was previously limited by data scarcity and interpretive complexity, numerous space polarimeters are currently being deployed or planned for the coming years. These include the European 3MI/EPS-SG and MAP/CO2M, the US PACE, MAIA, and AOS, and the Chinese DPC and PCF missions (Dubovik et al., 2019). Consequently, the significance of multi-angular polarimetry for atmospheric monitoring is expected to increase rapidly. The high potential value of these products will be illustrated using enhanced aerosol data obtained from MAP observations via the state-of-the-art GRASP algorithm (Dubovik et al., 2021).

Furthermore, the presentation will explore the synergies between different types of currently available satellite observations. Specifically, we will discuss the potential of synergistic retrievals combining: (i) passive Geostationary (GEO) and Low Earth Orbit (LEO) multi-platform observations, and (ii) passive and active satellite measurements. Implementing synergistic retrievals from multiple instruments is an efficient strategy to compensate for the individual weaknesses of different space-borne sensors. For example, while lidar observations are highly sensitive to the vertical variability of atmospheric aerosols, their interpretation typically relies on additional information regarding aerosol type. Conversely, MAP measurements are highly sensitive to aerosol type—which exhibits limited vertical variability—making MAP and lidar observations highly complementary and well-suited for synergistic retrieval. Additionally, combining high-frequency GEO observations with LEO measurements, which generally possess higher information content, is also highly promising. Finally, we will present and discuss multi-platform satellite retrievals utilizing passive observations from the Copernicus Sentinels, PACE, and other platforms, alongside active EarthCARE lidar measurements.

Biography:

Oleg Dubovik, a CNRS Research Director at the Laboratoire d'Optique Atmosphérique, Université Lille, France. Prior to joining CNRS, Oleg was part of AERONET project at NASA Goddard Space Flight Center, leading aerosol retrieval developments. He is an author of more that 290 articles with 3 first-authored papers with  > 2000 citations each with  total number of citations over 49000. Dr. Dubovik focuses on refinement of methodological aspects of remote sensing inversion and its applications for diverse Earth Observation projects. Main scientific accomplishments of Dr. Dubovik include: aerosol retrieval algorithm for AERONET federated network of ground-based sun-photometers, development of  popular GRASP versatile algorithm, pioneering climatology of absorption and optical properties of ambient aerosol, efficient software for scattering by non-spherical aerosols. Dr. Dubovik serves as the Editor-in-Chief of Satellite Missions Section in Frontiers in Remote Sensing, Editor in AMT and JQSRT journals. He organizer of APOLO workshops and other conferences. Dr. Dubovik is an American Geophysical Union Fellow, recipient of NASA Medal for Public Service. In addition to academic career, he is a co-founder of GRASP SAS enterprise, providing services in atmospheric remote sensing.

Plenary Talk 3:

Zhipei Sun

Aalto University

Title: Atomic Engineering for Next-Generation Lasers

Abstract：

Atomic engineering offers a path to compact, versatile light sources by controlling how materials generate, amplify, and transform light. In this talk, I will connect atomic-scale material design with advanced laser capabilities on chips and optical fibres. Examples include atomic-layer deposition of rare-earth gain materials for efficient on-chip amplification and high-performance lasers on silicon-compatible platforms. In nonlinear optics, twisted two-dimensional crystals offer interlayer orientation as a design parameter for phase matching, enabling all-fibre-integrated frequency conversion, photon-pair generation, and ultrafast lasers. Together, these advances link optical gain, pulse generation, and wavelength conversion through atomic design. The broader vision is to achieve capabilities beyond current technologies while making these powerful light sources smaller, easier to manufacture, and widely accessible for precision measurement, optical computing, and quantum technologies.

Biography:

Zhipei Sun is Professor of Photonics at the Department of Electronics and Nanoengineering of Aalto University, Finland. Currently, he is actively involved with the European Research Council advanced grant, European Quantum Flagship, the Research Council of Finland’s Photonics Flagship, and Centres of Excellence on quantum technology and quantum materials. His research interests include nonlinear optics, nanophotonics, and ultrafast photonics.

Plenary Talk 4:

Qiang Wu

Nankai University

Title: Terahertz stimulated phonon polariton and terahertz integration on Lithium Niobate chip

Abstract：

Phonon polaritons are coupled states of photons and phonons. In addition to the spontaneous phonon polaritons excited by the traditional thermal field, the stimulated phonon polaritons can be excited by techniques such as ultrashort pulse laser, whose frequencies are in the terahertz band. Terahertz stimulated phonon polariton provides a good opportunity for the development of terahertz science and technology.

This report will briefly introduce our work on THz stimulated phonon polariton and terahertz integration on Lithium Niobate chip. It mainly includes basic theories such as transient subwavelength optics and nonlinear Huang’s equation, Spatio-temporal super-resolution imaging, and terahertz integration based on the above basic work. It also demonstrates the potential applications in sensitive sensing detection, on-chip integrated terahertz time-domain spectroscopy, future on-chip communication (beyond 6G), etc.

Biography:

Qiang Wu is a full professor at School of Physics and TEDA Institute of Applied Physics, Nankai University. He is also serving as the advisor of Boling Class, a partner of Pilot Scheme of Talent Training in Basic Sciences of China, the deputy director of Optical Precision Molding Committee of Chinese Society for Imaging and Technology, the member of High-Speed Photography and Photonics Committee of Chinese Optical Society, the member of Terahertz Biophysics Branch of Biophysical Society of China, and the member of Physics Competition Committee for Middle School students of China. He received the BSc in 2000 and PhD in 2005 from Nankai University and was a postdoc at Tufts University and MIT in 2007 and 2008. In the research area of THz stimulated phonon polariton, hyperdoped materials and devices, he has a series of research results.

Plenary Talk 5:

Xiulai Xu

Peking University

Title: Light–Matter Interactions between Low-Dimensional Excitons and Nanophotonic Structures

Abstract：

Low-dimensional semiconductor excitons provide an attractive platform for exploring light–matter interactions owing to their strong oscillator strength, rich internal degrees of freedom, and potential for integration into photonic devices. In this talk, I will present our recent studies of light–matter interactions between low-dimensional excitons and nanophotonic structures, based on plasmonic nanocavities and photonic-crystal platforms.

I will first discuss strong and enhanced light–matter interactions between two-dimensional excitons and plasmonic nanocavities, where deep-subwavelength optical confinement enables large coupling strengths, Purcell enhancement, and chiral control of excitonic emission. I will then introduce our studies of photonic-crystal microcavities and waveguides coupled to quantum emitters. These structures offer high-quality-factor optical confinement, engineered dispersion, and efficient on-chip control of photons and excitons, enabling cavity quantum electrodynamics, chiral light–matter interactions, and topological photonic functionalities. Finally, I will discuss the prospects of integrating low-dimensional excitonic materials with nanophotonic architectures for actively controlled and integrated quantum photonic devices.

Biography:

Xiulai Xu is a Boya distinguished professor in School of Physics, Peking University. He received his PhD from Cavendish Laboratory, University of Cambridge. After that he worked as a senior research scientist in Hitachi Cambridge Laboratory and a professor in Institute of Physics, Chinese Academy of Sciences before moving to Peking University. His research has been mainly focused on the quantum optoelectronic properties of low dimensional semiconductor systems for optical quantum information processing.

Plenary Talk 6:

Yinhong Sun

Institute of Applied Electronics,CAEP

Title: Recent advances in high power lasers with different wavelength

Abstract：

Driven by the demand for high-power lasers in laser materials processing, medical applications and atmospheric monitoring, we investigated laser sources emitting at different center wavelengths. A 5 kW polarization-maintained, near-diffraction-limited output was achieved using a large-mode-area (LMA), low-numerical-aperture (NA) polarization-maintaining fiber together with phase modulation that raises the stimulated Brillouin scattering (SBS) threshold. A 2.5 kW green laser output with a frequency-doubling efficiency above 60% was obtained by high-efficiency second-harmonic generation (SHG) in an LBO crystal. A 1.4 kW narrow-linewidth, near-diffraction-limited output at 2 μm, with a linewidth of 2.6 GHz, was demonstrated by combining a Tm-doped fiber with high-order phase modulation. Finally, a 100 W-class mid-infrared output was realized by direct lasing of solid-state lasers.

Biography:

Yinhong Sun is Professor at the Institute of Applied Electronics, China Academy of Engineering Physics (CAEP), where he also serves as Acting Director of the Solid-State Laser Laboratory. His research focuses on high-efficiency amplification, beam quality control and nonlinear suppression in high-power fiber and solid-state lasers.

Plenary Talk 7:

Xuechun Lin

Institute of Semiconductors, Chinese Academy of Sciences

Title: High-Power Pulsed Lasers for Industrial Laser Cleaning Applications

Abstract：

Laser cleaning, as an emerging surface treatment technology, offers significant advantages such as non-contact processing, high precision, high efficiency, and environmental friendliness. It has found widespread applications in aerospace, automotive manufacturing, and electronics production. Pulsed lasers serve as the core light source for laser cleaning, and the development of high-repetition-rate, high-energy pulsed lasers is critical to advancing this technology’s industrial applications. We have proposed a radial-asymmetric and axial-uniform pumping technique, successfully achieving a single-pulse energy of 1.05 J and an average power of 3.17 kW in nanosecond pulsed laser output. Additionally, by employing a loss modulation strategy, we achieved controllable dual-pulse laser output with an average power of 1 kW and a single-pulse energy of 100 mJ.

Based on these advanced high-power laser systems, we have conducted an in-depth study of the ablation mechanisms in laser cleaning and developed a series of optimized processes and equipment. This technology enables high-efficiency, high-reliability, and high-quality laser cleaning, which has been successfully applied to industrial cleaning applications such as tire molds and radomes, significantly improving both production efficiency and cleaning quality.

Biography:

Xuechun Lin received his Ph. D. degree from the Institute of Physics, Chinese Academy of Sciences. He is the director of the All-Solid-State Light Sources Laboratory at the Institute of Semiconductors, Chinese Academy of Sciences. He also serves as vice president of the Beijing Optical Society and a member of the expert group for the National Key Research and Development Plan.

Prof. Lin focuses on high-power lasers and their applications, with major breakthroughs in key industrial laser technologies, development of high-performance laser products, and advances in laser precision welding and cleaning processes. His achievements were featured in the National 11th Five-Year Plan Major Scientific and Technological Achievements Exhibition. He has published over 160 papers in leading journals such as Nat. Commun., Light-Sci Appl., Laser Photonics Rev., Chaos Soliton Fract., Opt. Express, and holds more than 100 granted invention patents. As lead contributor, he won the Second Prize of the National Technological Invention Award in 2017 and the First Prize of the China Optical Engineering Society’s Technological Invention Award in 2020.

Plenary Talk 8:

Zefeng Wang

National University of Defense Technology) 

Title: Mid-infrared fiber gas lasers

Abstract：

Mid-infrared lasers have numerous applications, such as free-space communication, remote sensing, electro-optical countermeasures, medical treatment, atmospheric monitoring, and so on. Fiber gas lasers, a novel type of laser developed with the emergence of hollow-core fibers, combine many advantages of fiber lasers and gas lasers. In recent years, with the improvement of hollow-core fiber performance, mid-infrared fiber gas lasers based on gas-filled hollow-core fibers have achieved rapid development, and has been demonstrated to be an effective means of generating efficient, compact, and high-power mid-infrared laser emission. Since 2012, we have conducted lots of research in mid-infrared fiber gas lasers, and have achieved laser output in various wavelength bands from 3 to 5 μm. The highest output power above 4 μm has exceeded 30 watts, and the longest wavelength has exceeded 4.8 μm. Mid-infrared fiber gas lasers provide a novel solution to address the current technical bottlenecks in power enhancement and wavelength expansion of traditional solid-core fibers.

Biography:

He received his PhD degree in Optical Engineering from NUDT. He visited Bath University in UK from October 2012 to July 2014. He is Professor and doctoral supervisor at NUDT, executive deputy director of the State Key Laboratory of Advanced Lasers. He has published more than 100 SCI papers. His research interests cover mainly high-power fiber lasers, hollow-core fiber gas lasers, fiber gratings.

Plenary Talk 9:

Paolo De Natale

Italian National Research Council (CNR)

Title: Trace-Gas Sensing at parts in 10-16 and beyond

Abstract：

The mid-infrared spectral range is called the “fingerprint region” because there the strongest linestrengths, combined with an excellent resolution, can provide the best results for trace-gas sensing. In the last decade, a combination of Quantum Cascade Laser improvements, ultra-low noise electronics and cavity-enhancement, has allowed the full deployment of Saturated-absorption Cavity Ringdown-SCAR, pushing its sensitivity down to few parts in 10-16 for radiocarbon dioxide, 14CO2, detection, exciting the 4.5 micron wavelength rovibrational fundamental band. It will be shown how the present results were obtained and what are the perspectives for controlling amplitude and phase noise of semiconductor lasers emitting in the mid-IR range, namely Quantum and Interband Cascade Lasers (QCLs and ICLs). In turn, such progress can fill the gap with respect to visible and near infrared spectral ranges, where sensors beyond the classical noise limits are already operating. This progress can open new windows for measurements on molecular samples, including ultra-cold ones.

Biography:

Paolo De Natale started his career at LENS (European Laboratory for Nonlinear Spectroscopy), Firenze, Italy and is, at present, acting director of CNR-INO (National Institute of Optics of the National Research Council). In the years 2007-2021 was founder and director of CNR-INO.

Paolo De Natale main scientific achievements include: Pioneering pure frequency measurements of fundamental constants in hydrogen and helium; optical frequency comb synthesizers extended to the mid and far-infrared; Probing the ultimate sensitivity limits of optical fibers; Pioneering laser spectroscopy sensing in seismic and volcanic areas; Unveiling quantum-limited frequency fluctuations in quantum and interband cascade lasers; Inventing a new spectroscopic technique, SCAR-Saturated Absorption Cavity Ringdown, with record level sensitivities in molecular detection; new frequency combs by nonlinear quadratic processes; Design of analytical set-ups using liquid-droplets, fiber resonators and photoacoustic detection schemes; exploring the classical to quantum noise limits in the infrared range.

He authored more than 500 publications, holds 15 patents and is co-founder of two spin-off companies, ppqSense srl and QTI srl. He is Fellow of SPIE (since 2011) and OSA (now OPTICA), since 2015.