Tunable fiber fabry-perot filter for PM-IM conversion and efficiency improvement in radio-over-fiber links

Yubin Ji; Shilie Zheng; Ze Li; Xiaofeng Jin; Xianmin Zhang; Hao Chi
September 2010
Microwave & Optical Technology Letters;Sep2010, Vol. 52 Issue 9, p2090
Academic Journal
A novel method is proposed and demonstrated to simultaneously realize phase-to-intensity modulation conversion (PM-IM) and efficiency improvement using a fiber Fabry-Perot (FFP) tunable filter. To achieve the conversion of phase modulation to intensity modulation, the phase-modulated light is transmitted from one of the slopes of the FFP tunable filter to break the amplitude balance of the sidebands. Meanwhile, the modulation depth is increased due to the more suppression of the optical carrier than one of the first-order sidebands. The results demonstrate that the PM-IM conversion has been achieved and an about 10-dB gain of electrical signal power could be obtained with suitable optical carrier suppression for both 10-and 20-GHz microwave input. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2090–2095, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25389


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