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Overcoming Tap-Delay-Variation Induced Distortion in Microwave Photonic Filters

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PROJECT TITLE :

Overcoming Tap-Delay-Variation Induced Distortion in Microwave Photonic Filters

ABSTRACT:

A new technique to realize a multiple-tap microwave photonic filter that is free of the limitations of tap-delay-variation induced filter distortion, which enables it to operate at high microwave frequencies, is presented. It is based on a technique using a wideband high-order dispersion compensator to cancel the group delay variations of the primary optical fiber dispersive delay line. The compensator, implemented using a programmable Fourier-domain dynamic wavelength processor incorporating liquid crystal on silicon pixels, provides a tailored optical phase profile to effectively cancel out the tap-delay variations originating from the primary fiber delay line. Experimental results verify the new technique and demonstrate a 20-tap microwave photonic bandpass filter obtained using a multi-frequency laser source with equally spaced lines, which operates to 20 GHz without any radio frequency distortion.


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Overcoming Tap-Delay-Variation Induced Distortion in Microwave Photonic Filters - 4.9 out of 5 based on 18 votes

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