Microwave photonic bandpass filter based on spectrumslicing and phase modulator

Sheng-cai Jin; Ai-ling Zhang

doi:10.1007/s11801-011-0114-z

Optoelectronics Letters ›› 2011, Vol. 7 ›› Issue (2) : 113-116. DOI: 10.1007/s11801-011-0114-z

Article

Microwave photonic bandpass filter based on spectrumslicing and phase modulator

Sheng-cai Jin¹ ,
Ai-ling Zhang¹^,^b

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Abstract

A tunable microwave photonic bandpass filter with high mainlobe-to-sidelobe ratio (MSR) based on a phase modulator and a dispersive device is proposed. The multi-tap characteristics of the filter are realized by slicing a broadband source using a Mach-Zehnder interferometer (MZI) which results in a high MSR of 25 dB. The tunability of the filter is realized by an optical variable delay line (OVDL) in one arm of the MZI, which changes the wavelength spacing of the sliced broadband source and results in a tunable free spectrum range (FSR) of the filter. The central frequency of the bandpass filter is tunable from 10.7 GHz to 27 GHz by changing the wavelength spacing from 0.145 nm to 0.054 nm.

Keywords

Radio Frequency / Single Mode Fiber / Radio Frequency Signal / Wavelength Spacing / Radio Over Fiber

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Sheng-cai Jin, Ai-ling Zhang. Microwave photonic bandpass filter based on spectrumslicing and phase modulator. Optoelectronics Letters, 2011, 7(2): 113‒116 https://doi.org/10.1007/s11801-011-0114-z

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This work has been supported by the National Natural Science Foundation of China (No.60808004), the New Century Excellent Talents in University (No.NCET-07-0611), and the Tianjin Natural Science Foundation (No.08JCYBJC14500).