Seminar on Developments in Lasers and Industrial Applications

Date: 22 Feb 2011 - 22 Feb 2011

Venue: Auditorium, Level 3, Tower Block, SIMTech


Laser technology continues to evolve, offering the possibility to operate at different wavelengths, with better efficiencies, and other advantages over conventional lasers. In this seminar, Dr Zhang Yongfang from Access Laser Company and Dr Li Cheng from Raycus Fiber Laser Technology will present on laser developments and their applications. Dr Wang Xincai and Dr Wang Zhongke from SIMTech will present on laser processing of electronic materials and prototyping of microfluidics. Participants will gain better understanding of recent advances and the seminar provides a networking platform to exchange ideas.


This seminar is jointly organised by SIMTech and Wavelab Scientific.



9.00am : Welcome Addresss by Dr Zheng Hongyu


9.10am :Overview of WaveLab Scientific Pte Ltd by Mr Robert Huang


9.15am :Recent Development in CO2 Lasers and New Applications

             by Dr Zhang Yongfang, Access Laser Company

Abstract :

The CO2 laser as an industrial work horse has been widely recognised. However, its precise and densely populated spectral lines have not been widely utilised commercially. This situation has changed since the advent of a new line of high precision, portable, and tunable CO2 lasers from Access Laser Company. Emissions from the CO2 molecule suitable for laser operation span the wavelength range of 9.2-10.8 µm. A rich array of combinations of carbon and oxygen isotopes produces another 17 different molecular species, a total of 18 sets of unique spectral lines. With over 40 lines to every species practically available these isotope molecules fill in each other’s spectral gaps, and extend the spectral range to 9-12 µm. Areas that benefit immediately from commercial instrumentation of this kind of lasers are industrial process monitoring and control, disease diagnostics, chemical weapon agent sensing, environment monitoring, hazardous gas leakage detection, biomedical development, etc. Aside from spectroscopic techniques, the precise wavelength selection adds another dimension to mass spectroscopy in the study of life-forming carbohydrate molecules. Many more applications are taking shape because of the availability of this new breed of lasers.

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10.00am : High Power Fiber Lasers and their Applications

                by Dr Li Cheng, Raycus Fiber Laser Technology

Abstract :

Over the last 10 years, huge progress has been achieved in high power fiber laser development and industrial applications. Presently, 10 – 30 W nanosecond pulsed fiber lasers are the most used marking lasers in the market. Fiber lasers have become more and more attractive for cutting and welding of metal materials in electronics, automotive, and aircraft industries due to their advantages over conventional CO2 lasers and other solid-state lasers.

Raycus is the only fiber laser manufacturer in China and currently is the third largest fiber laser manufacturer in the world producing 10 – 30 W nanosecond pulsed fiber lasers and 10 – 400 W continuous wave fiber lasers. The multi-kilowatts laser products will be ready by the end of year 2011. In this presentation, recent progress in high power fiber laser development and applications will be described and reviewed.

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10.45am :Coffee break, Networking and View Exhibits

 11.00am :Laser Processing of Electronic Material Substrates

              by Dr Wang Xincai, SIMTech

Abstract :

Laser processing is widely applied in semiconductor front-end/back-end processes, advanced packaging, flat panel display production, solar cells, and nanofabrication, etc. Laser processing is integral to mass production of microelectronics. In this seminar, we will update SIMTech’s recent development and capabilities in laser processing of electronic material substrates, reporting on laser drilling/cutting flex PCB substrates and laser fabrication of nanobumps on Si substrate.

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11.30am : Rapid Prototyping of Microfluidic Channels Using Laser Direct Writing

                on Polymer Substrates by Dr Wang Zhongke, SIMTech

Abstract :

Microchannels form the backbone of microfluidic devices in areas from chemical synthesis and biological analysis to optics and information technology. The design of the channels are frequently modified in order to optimise performance. Laser techniques can provide great flexibility and allows iterations of the design and fabrication of microfluidics with short time cycle and cost effectiveness. Thus, laser techniques to fabricate microfluidic channel is a faster alternative to conventional techniques such as lithography, electron beam writing or photo-patterning, and hot-embossing or injection moulding in terms of rapid prototyping.

In this talk, research on laser fabrication of microfluidic channels using CO2 laser (10.6μm), UV excimer laser (248 nm) and femtosecond laser (775 nm, 150 fs) will be presented. The control of the channel size in terms of channel width, depth, aspect ratio, and modification of the channel surface wetting characteristics will be discussed.

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12.00pm : Lunch


1.30pm : End of Seminar


About the presenters

Dr Zhang Yongfang, Founder, President and Chief Scientist of Access Laser Company, obtained his PhD in Electrical Engineering from California Institute of Technology under Prof. William B. Bridges in 1993. He served as Vice President and Chief Scientist at Synrad, Inc from 1993 to 1999. He started Access Laser Company in 1999. He has more than 20 years experience with CO2 lasers, 11 years of leadership role in the industry of RF excited CO2 lasers in the US and has many US patents and publications. He is also visiting Professor for Huazhong University of Science and Technology, International Committee of the State Key Laboratory of Laser Technology Academic Committee.


Dr Li Cheng received his PhD in laser physics from Chinese Academy of Science in 1996, for his work on Tm- and Ho-doped eye-safe solid-state lasers. From 1996 to 1998, he was a Postdoctoral Research Fellow in Tsinghua University, Beijing, China, with his research focusing on diode-pumped solid-state lasers and the frequency doubling. Since 1998, he has been a Research Fellow / Senior Research Fellow respectively at the Institute for Laser Science, University of Electro-Communications, Japan, Optoelectronics Research Centre, University of Southampton, and Physics Department of Heriot-Watt University, U.K. with most of his work on high power fiber lasers and planar waveguide lasers. In 2004, he was employed by Laser Division of GSI Group Inc. as a Senior Laser Scientist for R&D of high power fiber lasers and components. Dr Li returned to China in 2010 and now serves as the Chief Technical Officer of Raycus Fiber Laser Technology.


Dr Wang Xincai is Associate Research Scientist at SIMTech. He received his B.Eng. and M.Eng. from Tsinghua University, Beijing, and Ph.D from NUS. His research interest is on laser micromachining and processing. His past R&D activities cover III-V semiconductor materials, laser processing of GaN, laser semiconductor annealing, laser drilling/cutting of polymer composites, PCBs, alumina ceramic and Si substrates, and laser micro/nano texturing of Si and polymer materials.


Dr Wang Zhongke is a Researcher in Singapore Institute of Manufacturing Technology (SIMTech) since 2007. He specialises in laser material processing including laser micromachining, and laser micro- and nano-fabrication. Before joining SIMTech, he was with HUST (Huazhong University of Science and Technology) of China, REKIN (The Institute of Physical and Chemical Research) of Japan, AIST (National Institute of Advanced Science & Technology) of Japan, and ETH-Zurich (Swiss Federal Institute of Technology Zurich) in Switzerland.


Who Should Attend

Senior Management and engineers and researchers from the laser, optics and electro-optics, biomedical, electronics and precision engineering industry. Universities and polytechnic lecturers.



Registration is on first-come, first-serve basis. To book a seat, please register online.


Contact Us

For enquiries on seminar content: 

Dr Gary Ng, Email:

For general enquiries: 

Ms Samantha Sukiyama Chan, Email:


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