It is well known that interferometers make great sensors. This is because phase is a magnitude that can be measured with very accurate precision and with a great dynamic range at the same time. Integrating these devices on a chip is very appealing because it can make the device much smaller, lighter, and affordable. However, this technology also poses some challenges, which can degrade performance with respect to free-space or fiber-based devices. In this work we overview these challenges and possible strategies to tackle them.

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C. J. Oton, J. Elaskar, F. Bontempi, F. Piretta, R. M. A. Ayaz, S. Faralli, and F. Di Pasquale, "Miniaturized photonic sensors based on micro-interferometers," Proc. SPIE 12424, Integrated Optics: Devices, Materials, and Technologies XXVII, 124240S (Presented at SPIE OPTO: February 02, 2023; Published: 17 March 2023); https://doi.org/10.1117/12.2655436.