| Biography | |
|---|---|
 Dr. Guanhao Wu Tsinghua University, China |
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| Title: Dual-comb ranging | |
| Abstract: Absolute distance measurement is widely used in high-accuracy manufacturing.The advent of the optical frequency comb has led to revolutionary progress in absolute distance measurement. Dual-comb ranging (DCR) is an emerging tool that exploits phase resolution and frequency accuracy for high-precision and fast-rate distance measurement. Using two coherent frequency combs, dual-comb ranging allows time and phase response to be measured rapidly. It breaks through the limitations related to the responsive bandwidth, ambiguity range, and dynamic measurement characteristics of conventional ranging tools.In this talk, I will introduce TOF-based dual-comb ranging, including principles of system and parameter optimization, and discusses synthetic wavelength interferometry and carrier wave interferometry in a DCR system in the absence of phase noise and intensity noise, and also discusses these noise sources and methods for realizing a low-noise DCR. | |
| Biography: Guanhao Wu is currently an Associate Professor in the Department of Precision Instrument, Tsinghua University, Beijing. He received Ph.D degree in optical engineering from Tsinghua University in 2008. He used to be a visiting researcher in National Metrology Institute of Japan (NMIJ) from 2011 to 2012.His research interests include frequency comb, comb-based distance measurement, light detection and ranging (Lidar) and other precise dimensional measurement technology. In recent years, he has published more than thirty international refereed journal papers (including Optics Letters, Optics Express and Scientific Reports) and he is the holder of ten Chinese patents. He won Jin Guofan annual young scholar award in 2012 and the Beijing Higher Education Young Elite Teacher award in 2013. Guanhao Wu has served on several technical and organizing committees for international and domestic conferences including the Conference on Lasers and Electro-Optics (CLEO) Technical Subcommittee member (2016-2018),24th Congress of International Commission for Optics(ICO-24)Technical Subcommittee member (2017), and the 7th Advanced Lasers and Photon Sources Conference (ALPS2018). Guanhao Wu is the member of the national optoelectronic measurement standardization technical committee (2015-2020), and the member of metrology instrument professional board of China Institute of Measurement and Testing Technology. | |
