A photonic approach for measuring microwave frequency over a wide bandwidth is proposed. An optic group delay line composed of several magneto-optical switches and a 1.6-km single-mode fiber is used as a tunable dispersive medium in the measurement setup. A minimum frequency accuracy of 80 MHz in the range of 1-20 GHz is achieved experimentally.
© 2011 Chinese Optics Letters
Pengsheng Wu, Xiuyou Han, Yiying Gu, Shanfeng Li, Shu Hu, and Mingshan Zhao, "Novel photonic approach to microwave frequency measurement using tunable group delay line," Chin. Opt. Lett. 9, 081301-081301 (2011)