Day 3 :
Keynote Forum
Shien-Kuei Liaw
National Taiwan University of Science and Technology, Taiwan
Keynote: Overview of linear-cavity tunable fiber lasers with narrow linewidth
Time : 09:30-10:00
Biography:
Shien-Kuei Liaw received double Doctorate in Photonics Engineering from National Chiao-Tung University in 1999 and in Mechanical Engineering from National Taiwan University in 2014, respectively. He joined the Chunghua Telecommunication, Taiwan, in 1993. Since then, he has been working on optics communication, sensing and fiber based devices. He was a visiting Researcher at Bellcore (now Telcordia), US for six months in 1996 and a visiting Professor at University of Oxford, UK in autumn 2011. Currently, he was the Director of Optoelectronic Research Center and now is the distinguished Professor at National Taiwan University of Science and Technology (Taiwan Tech). He has been awarded 37 patents and has published 240 journal articles and international conference presentations. He has been actively contributing for various conferences as program chair, organizing committee chair, session chair and invited speaker. He is a senior member of IEEE, OSA and SPIE.
Abstract:
Recently, much more attention has been directed to diode-pumped single-longitudinal-mode (SLM) fiber lasers because of their high reliability, compactness, and capability of shot-noise-limited operation in the megahertz frequency range. On the other hand, tunable laser sources have seen various applications in recent years such as optical switching, network protection or digital communication. Among various lasers, fiber lasers present the advantages of high brightness, low intensity noise, thermal stability, excellent coupling into a single mode fiber and better compatibility with fiber components. In this talk, we will review and discuss several types of single-longitudinal mode (SLM) linear cavity, tunable fiber lasers, either in C+L band or 1064 nm band. For linear-cavity fiber laser schemes, the elements may base on a loopback optical circulator (OC), a broadband mirror, a Faraday rotator mirror or a 2x2 fiber coupler integrated a partial reflectance fiber Bragg grating (FBG) as the front cavity end. For SLM selection, using multiple subring cavities based on the Vernier effect, a piece of gain fiber saturable absorber as modes filter or their hybrid type. For wide-tuning range fiber laser, the wavelength tuning mechanism include the use of a broadband fiber mirror (BFM) integrated tunable FBGs as cavity ends, using bending device to facilitate wavelength tuning of FBG, a large tuning range cover C+L band with good resolution of 0.1 nm is obtained. Laser characteristics such as output, signal-to-noise ratio, linewidth, threshold pump power, pumping slope efficiency and side mode suppress ratio are measured. One example of fiber laser characteristics are 1 MHz, 59 dB, 13% and 0.1 dB, respectively, for linewidth, side-mode suppression ratio, quantum efficiency and power variation of whole tuning range. The pumping power efficiency may be improved more than 10% by recycling the residual pump power to the gain medium. Have the advantages of simpler structure, larger pump slope efficiency and shorter cavity, these fiber lasers may find potential applications in various ways.
Keynote Forum
C Wei Xu
Verizon Communications, USA
Keynote: Our missions in the current crisis
Time : 10:00-10:30
Biography:
C Wei Xu, a Chief Architect at Verizon Communications USA, is an IT expert for 20+ years. Early in 1994, he developed Gauntlet Firewall, rated as the #1 during 1995-1998. Meanwhile, he created the entire commercial IPSEC VPN late in 1994, known as the first VPN product in IT history. During 1999 to 2005, he founded a start-up pioneering in Secure Cloud of Software-defined Networking. Since 2006, he served as a principle/chief architect at Northrop Grumman, DOT, Military, USAID, commercs and governments. Establishing Virtumanity* in 2012, he published books of philosophy followed by scientific papers in: “Theory of Physical Cosmology – Universe Particles” and “Theory of YinYang Physics – Horizon Fields”, revealing secrets of all elementary particles, the topological framework of classical and contemporary physics, as Unified Field Theory. He holds BS and first MS degrees in Theoretical Physics from Ocean University of China and Tongji University, and the second Master’s Degree in Electrical and Computer Engineering from University of Massachusetts.
Abstract:
The keynotes present a historical analysis of scientific achievements, essential events in physics, deep logics in sciences, and philosophy of consensus. A critical re-evaluation of our knowledge is the start of a new way to a new era, the revolution of theoretical science and the return of philosophy: Back to the Future. Mankind has been furnished with groundbreaking enlightenment of the demonstrated theories of our universe: Duality of physical and virtual worlds, revealing Elementary Particles and Unified Field Theory according to concise, systematic, philosophical and mathematical principles. The year 2015, therefore, bids farewell to an intellectual age of classical physics defined by mathematical empiricism, from Newton's Mechanics of 1687 to Einstein’s Relativity of 1915, and from Quantum Theory of 1920s to contemporary physics. rnrnToday, human society is at the dawn of a series of revolutions for a new era:rn1. Advancing scientific philosophies to the next generation,rn2. Standardizing topological frameworks for modern physics,rn3. Developing information technologies through virtual reality,rn4. Theorizing biology and biophysics in innovative life sciences,rn5. Reformulating metaphysics on the basis of scientific naturalism.rnrnOur challenge, however, is even greater. It is the challenge to open up the world to facts hidden in the fabric of daily life, the challenge to transcend metaphysical prejudices and the ignominious clamor of hype. As a scientist, you may find youself in pioneering our human revolution. rn
- Track 1: Quantum Science
Chair
Manijeh Razeghi
Northwestern University, USA
Co-Chair
Ian O Driscoll
Cork Institute of Technology and Tyndall National Institute, Ireland
- Track 1: Quantum Science
Track 2: In Depth Quantum Mechanics
Chair
Yukio Tomozawa
University of Michigan, USA
Co-Chair
Waseem Bakr
Princeton University, USA
- Track 3: Quantum States
Track 4: Quantum Mechanics Interpretation
Track 5: Strings in Quantum Physics
Chair
Kazuhisa Kakurai
RIKEN Center for Emergent Matter Science, Japan
Co-Chair
Alexander Kubanek
Ulm University, Germany
- Track 9: Nuclear Science
Track 10: Interaction and Maintenance
Chair
Ekmel Ozbay
Bilkent University, Turkey
Co-Chair
Colin Wilmott
Nottingham Trent University, UK
- Track 6: Quantum Physics Formulation
Track 7: Quantum Field Theory
Track 8: Quantum Transport and Dissipation
Track 11: Latest Technologies, Innovations and Instruments
Chair
Shien-Kuei Liaw
National Taiwan University of Science and Technology, Taiwan
Co-Chair
Yuji Hasegawa
TU-Wien Atominstitut der Österreichischen Universitäten, Austria