Release Time:2022-07-05  Hits:

Date of Publication: 2011-01-01

Journal: 发光学报

Issue: 9

Page Number: 944-949

ISSN: 1000-7032

Abstract: A photonic approach for microwave frequency measurement is proposed. A phase difference of the two microwave signals carried on two optical wavelengths is induced by a tunable dispersion medium. The interference microwave power is tuned periodically by changing dispersion value. The frequency of the microwave signal can be extracted from the period. In the proposed approach, a 7-bit optic delay line composed by 8 magneto-optical switches and 1.6 km single-mode fiber (SMF) is utilized as the tunable dispersion medium. The measurement accuracy remains within ±40 MHz over a range of 1~20 GHz. The minimum measureable power can reach to -20 dBm and the dynamic range is 45 dB.

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