Design and realization of an integrated optical frequency modulation discriminator for a high performance microwave photonic link

This paper reports the design, fabrication and the characterization of an integrated optical filter for an FM discriminator. The filter is based on optical ring resonator structures which are fully reconfigurable using thermo-optical tuning. The desired characteristic, which is a linear slope with zero in a particular region, is demonstrated. This characteristic is needed in a high performance microwave photonics link with increased spurious free dynamic range.