| Autor: |
韩秀友 Han Xiuyou, 谷一英 Gu Yiying, 吴彭生 Wu Pengsheng, 赵明山 Zhao Mingshan, 胡墅 Hu Shu, 李善锋 Li Shan-feng |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Chinese Journal of Luminescence. 32:944-949 |
| ISSN: |
1000-7032 |
| DOI: |
10.3788/fgxb20113209.0944 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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