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Recent advances in high power fiber lasers and their applications
¾ 연사 : 정 윤 찬 교수 (서울대 전기공학부)
¾ 일시 : 2010년 9월 9일 (목) 오후 5:30~6:30
¾ 장소 : 서울대학교 301동 102호

Abstract:
In the past years we have witnessed remarkable advances in optical fiber laser and amplifier technologies. Optical fiber lasers of output powers beyond a kilowatt or multi-kilowatt with high beam quality have already been demonstrated and started to be deployed in industries. This rapid progress has been stimulated by the exceptional power-handling capability of optical fibers as gain media as well as the availability of powerful diode lasers for use as pumps. The progress was first made at around 1.1 microns with Yb-doping, next around 1.6 microns with Er-doping, and most recently at wavelengths around 2 microns with Tm-doping. Optical fiber lasers have numerous attractions over the more conventional “bulk” lasers in terms of energy-efficiency, power-scalability, thermal-management, flexibility and controllability in spatial/spectral/temporal domains, compactness, cost-effectiveness, and more. Indeed, this optical fiber photonic circuitry combined with pump-diode technology provides a unique high-gain environment for robust designs, which are also all-solid state, compact, reliable, and reproducible. Here I review the recent advances in high power fiber lasers and their applications with a particular focus on rare-earth-doped fiber lasers in conventional double-clad, large-core designs as well as in novel microstructured designs for more refined performances.
Biography:
Dr Yoonchan Jeong obtained his PhD in 1999 from Seoul National University, Korea, for research in the area of fibre and nonlinear optics. Subsequently, he held a two years’ government-funded postdoctoral fellowship at the same university. He joined the Optoelectronics Research Centre (ORC) at the University of Southampton in 2001, where he was a Reader (Senior Faculty Position) since 2006. He has now joined the School of Electrical Engineering, Seoul National University from September, 2010. His early research covered fibre and waveguide optics, holographic data storage, nonlinear optics, lasers, and displays. Following the initial wide experience with fundamentals in optics and lasers, his research interests have moved to high-power fibre lasers and their applications since he joined the ORC.
Dr Jeong’s work has led to over 150 publications, including patents, book contributions, and journal/conference papers. He served/has been serving on various programme committees for international photonics conferences, including the Optical Amplifiers and Their Applications (OSA) conference (2005, 2006), Photonic Fiber and Crystal Devices (SPIE, since 2008) and Fiber Lasers VI: Technology, Systems, and Applications (Part of Laser Source Engineering, Photonics West, SPIE, since 2008), and OECC 2010. He has also been serving as an Associate Editor for Optics Express (OSA) and a Board of Editors for JOSK (OSK) since 2009.