Yang,Sigang -DEPARTMENT OF ELECTRONIC ENGINEERING TSINGHUA UNIVERSITY

Associate Professor

Sigang Yang

Associate Professor

Education: Ph.D., M.E., B.E

Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

Office: 11-407, East Main Building

Tel: 86-10-62784784

Email: ysg@tsinghua.edu.cn

Dr. Sigang Yang received his Ph.D. degree in physical electronics from the Dept. of Electronics Engineering, Tsinghua University in Feb. of 2008. He was a postdoctoral fellow at the Dept. of Electrical and Electronic Engineering in the University of Hong Kong from August of 2008 to July of 2010. He joined the faculty of Tsinghua University in August of 2010. He is now an Associate Professor in the Dept. of Electronic Engineering, Tsinghua University. His research fields include computational electromagnetism, photonic crystal fibers; fiber nonlinearities; fiber based optical parametric amplifications (FOPAs) and oscillators (FOPOs); terahertz wave and frequency comb. He was the recipient of the Best Student Paper Award in 2004 Asia-Pacific Optical Communication Conference (APOC) and the SPIE Educational Scholarship in Optics & Photonics and 51st SPIE Annual Meeting, San Diego, California, 2006. His researches, such as broad band dispersion-compensation photonic crystal fiber (PCF) and slow light based on PCF have been both featured by Photonics Spectra in 2006 and 2008 respectively. He is also the reviewer for Optics Letters, Journal of the Optical Society of America B, Optics Express, Applied Optics and PIER & JEMWA. He is a member of the Optical Society of America (OSA).

Education background

Dr. Sigang Yang received his B. E. degree in material from Northeastern University, Shenyang, China in 2000 and the M. E degree in physical electronics from Huazhong University of Science and Technology, Wuhan, China in 2003. He received his Ph.D. degree in the Department of Electronic Engineering, at Tsinghua University, Beijing, China in 2008.

Experience

From 2008 to 2010, he worked as a postdoctoral fellow in the Department of Electrical and Electronic Engineering, at The University of Hong Kong. He is currently an Associate Professor in the Department of Electronic Engineering, at Tsinghua University.

Concurrent Academic

He is currently interested in parametric amplifiers and oscillators in photonic crystal fibers, photonic bandgap fibers, frequency comb in silicon photonics and terahertz wave.

Areas of Research Interests/ Research Projects

Photonic crystal fibers, fiber nonlinearity, frequency comb, terahertz wave

Academic Achievement

Journal Papers

[1] Sigang Yang, Xiaojian Wang, Zhaohui Wu, Chen Jin, Minghua Chen, Shizhong Xie, Narrow linewidth terahertz generation engined by all-fiber parametric optical source, IEEE Photonics Journal, 7(6), 1300407, 2015.

[2] Lei Zhang&, Sigang Yang*,Xiaojian Wang, Doudou Gou, Hongwei Chen, Minghua Chen, and Shizhong Xie, Demonstration of optical parametric gain generation at 1 μm regime based on a photonic crystal fiber pumped by picosecond mode-locked ytterbium- doped fiber laser, Journal of Optics, 16(1), 015202, 2014.

[3] Lei Zhang&, Sigang Yang*, Xiaojian Wang, Doudou Gou,Wei Chen, Wenyong Luo, Hongwei Chen, Minghua Chen, and Shizhong Xie, Photonic Crystal Fiber Based Wavelength- Tunable Optical Parametric Amplifier and Picosecond Pulse Generation，IEEE Photonics Journal, 6(5),1501908, 2014.

[4] Lei Zhang&, Sigang Yang*, Xiaojian Wang, Doudou Gou, Hongwei Chen, Minghua Chen, and Shizhong Xie, High-efficiency all-fiber optical parametric oscillator based on photonic crystal fibers pumped by ytterbium-doped fiber laser, Electronics Letters, 50(8), 624-626,2014.

[5] Lei Zhang&, Sigang Yang*, Xiaojian Wang, Doudou Gou, Hongwei Chen, Minghua Chen, and Shizhong Xie, Picosecond photonic crystal fiber-based doubly resonant optical parametric oscillator, IEEE Photonics Technology Letters, 26(7), 682-685, 2014.

[6] Gou Dou-Dou&, Yang Si-Gang*, Zhang Lei,Wang Xiao-Jian, Chen Hong-Wei, Chen Ming-Hua,Xie Shi-Zhong, Chen Wei, and Luo Wen-Yong, Fiber optical parametric oscillator based on photonic crystal fiber pumped with all-normal-dispersion mode-locked Yb:fiber laser, Chinese Physics B, 23(11), 114204,2014.

[7] Lei Zhang, Sigang Yang, Ying Han, Hongwei Chen, Minghua Chen, and Shizhong Xie, Optical parametric generation with two pairs of gain bands based on a photonic crystal fiber, Optics Communications, 300, 22-26, 2013.

[8] Lei Zhang&, Sigang Yang*, Xiaojian Wang, Doudou Gou, Xiangliang Li, Hongwei Chen, Minghua Chen, and Shizhong Xie, Widely tunable all-fiber optical parametric oscillator based on a photonic crystal fiber pumped by a picosecond ytterbium-doped fiber laser, Optics Letters, 38(22), 4534-4537, 2013.

[9] Lei Zhang&, Sigang Yang*, Pengxiao Li, Xiaojian Wang, Doudou Gou, Wei Chen, Wenyong Luo, Hongwei Chen, Minghua Chen, and Shizhong Xie, An all-fiber continuously time-dispersion- tuned picosecond optical parametric oscillator at 1 μm region, Optics Express, 21(21), 25167-25173,2013.

[10] Lei Zhang&, Sigang Yang*, Ying Han, Hongwei Chen, Minghua Chen, and Shizhong Xie, Simultaneous generation of tunable giant dispersive waves in the visible and mid-infrared regions based on photonic crystal fibers, Journal of Optics, 15(7), 075201,2013.

[11] Sigang Yang, Kenneth K. Y. Wong, Minghua Chen, Shizhong Xie，Fiber Optical Parametric Oscillator Based on Highly Nonlinear Dispersion-Shifted Fiber，Frontiers of Optoelectronics，6(1):25-29, 2013. Invited.

[12] Feifei Yin, Sigang Yang, Hongwei Chen, Minghua Chen, and Shizhong Xie, Tunable single-longitudinal-mode Ytterbium all fiber laser with saturable-absorber-based auto-tracking filter. Optics Communications. 285:2702-2706, 2012.

[13] Feifei Yin, Sigang Yang, Hongwei Chen, Minghua Chen, and Shizhong Xie, 60-nm-wide Tunable Single-longitudinal-mode Ytterbium Fiber Laser with Passive Multiple Ring Cavity, IEEE Photonics Technology Letters. 23(22):1658-1660, 2011.

[14] Sigang Yang, Chi Zhang, Yue Zhou, and Kenneth Kin-Yip Wong, “Two-Wavelength Square-Waveform Generation Based on Fiber Optical Parametric Oscillator,” IEEE Transactions on Microwave Theory and Techniques, 58(11): 3381-3386,2010.

[15] Sigang Yang, Kim K. Y. Cheung, Yue Zhou, and Kenneth K. Y. Wong, “Tunable Single-Longitudinal-Mode Fiber Optical Parametric Oscillator,” Optics Letters, 35(4):481-483, 2010.

[16] Sigang Yang, Kim K. Y. Cheung, Yue Zhou, and Kenneth K. Y. Wong, “Dispersion-Tuned Harmonically Mode-Locked Fiber-Optical Parametric Oscillator,” IEEE Photonics Technology Letters,22(8):580-582,2010.

[17] Sigang Yang, Yue Zhou, Jia Li, and Kenneth K.-Y. Wong, “Actively Mode-Locked Fiber Optical Parametric Oscillator,” IEEE Journal of Selected Topics in Quantum Electronics, 15(2):393-398, 2009.

[18] Sigang Yang, Xing Xu, Yue Zhou, Kim K. Y. Cheung, and Kenneth K. Y. Wong, “Continuous-Wave Single-Longitudinal-Mode Fiber Optical Parametric Oscillator with Reduced Pump Threshold,” IEEE Photonics Technology Letters,21(24):1870-1872, 2009.

[19]Sigang Yang, Hongwei Chen, Ciyuan Qiu,Ming Chen,Minghua Chen,Shizhong Xie,Jinyan Li and Wei Chen. “Slow-light delay enhancement in small-core pure silica photonic crystal fiber based on Brillouin scattering,” Optics Letters, 33(2),95-97,2008.

[20] Sigang Yang, Yejin Zhang, Jinyan Li, Wei Chen, Lina He, and Shizhong Xie. “Experimental Study of Mode Field Evolution of Dual-Core Photonic Crystal Fiber,” IEEE Photonics Technology Letters, 19(19):1523- 1525,2007.

[21] Sigang Yang, Yejin Zhang, Lina He, and Shizhong Xie. “Broadband dispersion-compensating photonic crystal fiber,” Optics Letters, 31(19):2830-2832,2006.

[22] Sigang Yang, Yejin Zhang, Xiaozhou Peng, Yang Lu, Shizhong Xie. “Theoretical study and experimental fabrication of high negative dispersion photonic crystal fiber with large area mode field,” Optics Express, 14(7):3015-3023, 2006.

Conference Papers

[1] Sigang Yang, Xiaojian Wang, Chen Jin, Donghui Jin, Hongwei Chen, Minghua Chen, Shizhong Xie，Optical generation of Terahertz based on all fiber highly coherent optical parametric light source， 40th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2015), H3A3.

[2] Zhaohui Wu,Sigang Yang, Xiaojian Wang, Minghua Chen,Hongwei Chen, Shizhong Xie, Widely Tunable Narrowband Terahertz Source Based on Difference Frequency Generation from Parameter Light Source, Asia Communications and Photonics Conference (ACP) 2015, ASu3C.2.

[3] Chen Jin,Sigang Yang, Xiaojian Wang, Minghua Chen,Hongwei Chen, Shizhong Xie, Stable Nanosecond Chirp-free Pulse Generation with Ultra-narrow Bandwidth from a Passively CW Mode-locked Fiber Laser, Asia Communications and Photonics Conference (ACP) 2015, AM3B.5.

[4] Lei Zhang&, Sigang Yang*, Hongwei Chen, Minghua Chen, and Shizhong Xie, Broadly time-dispersion-tuned narrow linewidth all-fiber-integrated optical parametric oscillator, Optical Fiber Communication Conference, OFC: 2014, W4E.2.

[5] Lei Zhang&, Sigang Yang*, Hongwei Chen, Minghua Chen, and Shizhong Xie, Ultraviolet-shift supercontinuum generation by cross-phase modulation in photonic crystal fiber，2013 Conference on Lasers and Electro-Optics: Laser Science to Photonic Applications, CLEO: 2013, JW2A.13.

[6] Lei Zhang&, Sigang Yang*, Hongwei Chen, Minghua Chen, and Shizhong Xie, Wavelength-tunable red-shift Cherenkov radiation in photonic crystal fibers for mid-infrared wavelength generation, 18th Opto-Electronics and Communications Conference, OECC: 2013, WS4-4.

[7] Doudou Gou&, Sigang Yang*, Lei Zhang, Xiaojian Wang, Hongwei Chen, Shizhong Xie, Theoretical design and experimental demonstration of photonic crystal fibers operating for parametric generation near 1.06 um, Asia Communications and Photonics Conference. ACP, 2013.

[8] Doudou Gou&, Sigang Yang*,Feifei Yin, Lei Zhang, Xiaojian Wang, Hongwei Chen, Shizhong Xie, SESAM-based ring-cavity all-normal-dispersion tunable ytterbium mode-locked fiber laser, 18th Opto-Electronics and Communications Conference, OECC: 2013.

[9] Xiaojian Wang&, Sigang Yang*, Lei Zhang, Hongwei Chen, Minghua Chen, Shizhong Xie, Theoretical modeling and experimental verification of optical parametric amplifier based on photonic crystal fiber at 1 um band, Asia Communications and Photonics Conference. ACP, 2013.

[10] Sigang Yang, Qin Li, K.S. Lui, and Kenneth K. Y. Wong, FM Mode-Locked Fiber Optical Parametric Oscillator, 37th European Conference on Optical Communication (ECOC). 2011. We.10.P1.04.

[11]Sigang Yang, Chi Zhang, Yue Zhou, and Kenneth K. Y. Wong, “Photonic Generation of Square Waveform Based on Fiber Optical Parametric Oscillator,” paper JTuD82, 2010 Conference on Lasers and Electro Optics/ Quantum Electronics and Laser Science Conference (CLEO/QELC), San Jose, California, USA (May 2010).

[12] Sigang Yang, Kim K. Y. Cheung, Xing Xu, Yue Zhou, and Kenneth K. Y. Wong, “Tunable Single-Longitudinal-Mode Fiber Optical Parametric Oscillator with Saturable-Absorber-Based Auto-Tracking Filter,” paper JWA16, 2010 Optical Fiber Communication Conference (OFC), San Diego, California, USA (March 2010).

[13] Sigang Yang; Jia Li; Yue Zhou; Wong, K.K.Y, “Actively mode-locked fiber optical parametric oscillator,” paper JWA12, 2009 Optical Fiber Communication Conference (OFC), San Diego, California, USA (March 2009).

[14]Sigang Yang, Yu Liang, Xing Xu, Kenneth K. Y. Wong, “Single-Longitudinal-Mode Continuous-Wave Fiber Optical Parametric Oscillator,” paper 7.1.3, 35nd European Conf. on Optical Communications (ECOC), Vienna, Austria(Sept. 2009).

[15]Sigang Yang, Xing Xu, and Kenneth K. Y. Wong, “Low threshold, dual-cavity continuous-wave fiber optical parametric oscillator,” paper TuA7, 14th OptoElectronics and Communications Conference (OECC), Hong Kong, China (2009).

[16] Sigang Yang, Yejin Zhang, Lina He, Shizhong Xie. “Experimental demonstration of very high negative chromatic dispersion dual-core photonic crystal fiber,” paper OThA6, 2007 Optical Fiber Communication Conference (OFC), Anaheim, California, USA (March 2007).

[17] Sigang Yang, Yejin Zhang, Shizhong Xie. “Transformation of a single mode photonic crystal fiber into a tunable dispersion compensator,” paper We3.P.1, 32nd European Conference on Optical Communication(ECOC), Cannes, France (Sept.2006).

[18] Sigang Yang, Yejin Zhang, Shizhong Xie. “Tunable Optical Filter Employing a Novel Quartz Cavity Etalon by Precise Angle Tuning,” 2006 Asia-Pacific Optical Communication Conference (APOC), Gwangju, South Jeolla, South Korea (2006).

[19] Sigang Yang,Yejin Zhang,Xiaozhou Peng,Xiangfei Chen,Shizhong Xie. “Analysis and evaluation of the effect of fabrication-related structure fluctuations on the loss of photonic crystal fibers,” 2004 Asia-Pacific Optical Communication Conference (APOC), Beijing, China (Nov. 2004).