Li Wei, Zhu Ning Hua, Wang Li Xian, Wang Jia Sheng, Liu Jian Guo, Liu Yu, Qi Xiao Qiong, Xie Liang, Chen Wei, Wang Xin, Han Wei
State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.
Opt Express. 2011 Jun 20;19(13):12312-24. doi: 10.1364/OE.19.012312.
We experimentally demonstrate a novel tunable true-time delay line with separate carrier tuning using dual-parallel Mach-Zehnder modulator and stimulated Brillouin scattering-induced slow light. The phase of the optical carrier can be continuously and precisely controlled by simply adjusting the dc bias of the dual-parallel Mach-Zehnder modulator. In addition, both the slow light and single-sideband modulation can be simultaneously achieved in the stimulated Brillouin scattering process with three types of configuration. Finally, the true-time delay technique is clearly verified by a two-tap incoherent microwave photonic filter as the free spectral range of the filter is changed.
