Optical approach for measuring unknown microwave frequency with improved sensitivity

Shu Hu; Xiuyou Han; Pengsheng Wu; Yiying Gu; Jingjing Hu; Mingshan Zhao

doi:10.1117/1.OE.52.2.025002

1 February 2013 Optical approach for measuring unknown microwave frequency with improved sensitivity

Shu Hu, Xiuyou Han, Pengsheng Wu, Yiying Gu, Jingjing Hu, Mingshan Zhao

Author Affiliations +

Optical Engineering, Vol. 52, Issue 2, 025002 (February 2013). https://doi.org/10.1117/1.OE.52.2.025002

Abstract

We propose a novel photonic technique for unknown microwave frequency measurement by employing an optical group delay line. The 7-bit optical delay line composed of several magneto-optical switches and 1.6 km single-mode fiber is designed as a tunable dispersive medium in the measurement system. In our scheme, the measurable frequency range of 1 to 20 GHz with a measurement error less than ±40 MHz was demonstrated experimentally. Also, we studied the sensitivity of the whole measurement system, and the minimum detectable power reached −50 dBm .

Citation Download Citation

Shu Hu, Xiuyou Han, Pengsheng Wu, Yiying Gu, Jingjing Hu, and Mingshan Zhao "Optical approach for measuring unknown microwave frequency with improved sensitivity," Optical Engineering 52(2), 025002 (1 February 2013). https://doi.org/10.1117/1.OE.52.2.025002

Published: 1 February 2013

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