Integrated Microwave Photonic Sensors

Abstract

The emerging microwave photonic (MWP) sensing has demonstrated great promise to offer advanced solutions for cutting-edge applications. The integrated MWP sensors, which use highly sensitive, compact, and CMOS-compatible integrated photonic devices, further push the limits of sensor performance and open up wider potential applications. This paper presents the recent development and advances in MWP sensing with a focus on integrated MWP sensors based on microresonators. An autocorrection-assisted MWP interrogation approach, which can achieve exceptionally high sensing resolution unaffected by the microresonator parameters, is introduced in detail. The first incorporation of machine learning techniques in MWP sensors to enable the temperature insensitive MWP sensing, which uses just a single microring resonance, is also presented.