Generation of terahertz signal by photomixing Kelly sidebands of mode-locking fiber laser
We investigate the photomixing Kelly sidebands of soliton mode-locking fiber laser to generate the Terahertz (THz) signal. A simulation model about soliton fiber laser with obvious ±1 order Kelly sidebands is built up to design the sidebands with strong intensity, narrow bandwidth and adjustable spacing. It is found that the parameters of mode-locking fiber laser such as the total dispersion, filtering bandwidths, pump power of the laser play significant roles in determining the features of the ±1 order Kelly sidebands and the relationships between them are investigated. By photomixing the ±1 order sidebands, the experimental result shows that the desired THz signals with high optical-to-THz conversion are generated at frequencies of 0.187THz from the lab-made Yb-doped mode-locking fiber lasers. Well-designed Er-doped ring-cavity soliton fiber laser is used for obtaining THz signal of narrow linewidth with 1.35THz frequency tunable range.
Southeast Univ. (China), Univ. of Southampton (United Kingdom)
Weiqian Zhao was born in Jiangsu, China. She graduated with B.S. and M.S. degrees in physics at Yangzhou University, China. She is currently pursuing the Ph.D. degree in electronic engineering at Southeast University, China. Now, she is also a visiting Ph.D. student at Optoelectronics Research Centre (ORC), University of Southampton, UK. Her research interest includes the advanced photonic fiber devices and the novel fiber optical system, fundamental and appliance study of nonlinear fiber optics.