Enhanced on-chip phase measurement by inverse weak value amplification

Meiting Song, John Steinmetz, Yi Zhang, Juniyali Nauriyal, Kevin Lyons, Andrew N. Jordan and Jaime Cardenas ()
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Meiting Song: University of Rochester
John Steinmetz: University of Rochester
Yi Zhang: University of Rochester
Juniyali Nauriyal: University of Rochester
Kevin Lyons: Hoplite AI
Andrew N. Jordan: University of Rochester
Jaime Cardenas: University of Rochester

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Optical interferometry plays an essential role in precision metrology such as in gravitational wave detection, gyroscopes, and environmental sensing. Weak value amplification enables reaching the shot-noise-limit of sensitivity, which is difficult for most optical sensors, by amplifying the interferometric signal without amplifying certain technical noises. We implement a generalized form of weak value amplification on an integrated photonic platform with a multi-mode interferometer. Our results pave the way for a more sensitive, robust, and compact platform for measuring phase, which can be adapted to fields such as coherent communications and the quantum domain. In this work, we show a 7 dB signal enhancement in our weak value device over a standard Mach-Zehnder interferometer with equal detected optical power, as well as frequency measurements with 2 kHz sensitivity by adding a ring resonator.

Date: 2021
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DOI: 10.1038/s41467-021-26522-2

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