Negative coefficient band-pass microwave photonic filter with improved mainlobe-to-sidelobe suppression ratio by Sagnac interferometer

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2013,（2）
• 页码范围: 108-111
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-013-2424-9

摘要

A tunable negative coefficient band-pass microwave photonic filter (MPF) with improved mainlobe-to-sidelobe suppression ratio (MSSR) by a Sagnac interferometer (SI) is experimentally demonstrated.The negative coefficient characteristic of MPF is achieved by using the phase modulation technology.The central frequency of the band-pass MPF is tunable continuously by changing the wavelength separation of multi-wavelength optical carriers.A 38-tap negative coefficient band-pass MPF whose MSSR is increased by about 6.371 dB is achieved in experiment by apodizing the tap coefficient with the Sagnac interferometer.