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http://dx.doi.org/10.7471/ikeee.2015.19.1.027

A Flexible and Tunable Microwave Photonic Filter Based on Adjustable Optical Frequency Comb Source  

Tran, Thanh Tuan (Dept. of Electronics, Myongji University)
Seo, Dongsun (Dept. of Electronics, Myongji University)
Publication Information
Journal of IKEEE / v.19, no.1, 2015 , pp. 27-32 More about this Journal
Abstract
A flexible and tunable microwave photonic filter based on adjustable optical frequency comb source is demonstrated. We use a combination of a dual parallel Mach Zehnder modulator and an intensity modulator to generate fifteen comb lines with proper weights to implement a desired filter. The optical comb weights, corresponding to the tap coefficients of the filter, are flexibly changed by adjusting the operation parameters of the modulators. The achieved bandwidth and stopband attenuation of the tunable filter are 0.7 GHz and 20 dB, respectively. In addition, we overcome the undesired low frequency suppression appeared in a conventional scheme by applying a dual parallel Mach Zehnder modulator for single sideband suppressed carrier modulation.
Keywords
Microwave photonic filter; tunable filter; optical comb source; optical modulator; microwave photonics;
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