Quantum-enhanced fiber-optic gyroscopes using quadrature squeezing and continuous variable entanglement

Michael R. Grace, Christos N. Gagatsos, Quntao Zhuang, Saikat Guha

Research output: Contribution to journalArticlepeer-review


We evaluate the fundamental performance of a fiber-optic gyroscope (FOG) design that is enhanced by the injection of quantum-optical squeezed vacuum. In the presence of fiber loss, we compute the maximum attainable enhancement over a classical, laser-driven FOG in terms of the rotation estimator variance from a homodyne measurement. We find that currently realizable amounts of single-mode squeezing are sufficient to access the maximum quantitative improvement, but that this gain in rotation sensitivity is limited to a marginal constant factor. We then propose an entanglement-enhanced FOG design that segments a fixed amount of available fiber into multiple fiber interferometers and feeds this sensor array with multi-mode-entangled squeezed vacuum. Our design raises the maximum improvement in sensitivity to an appreciable factor of e ≈ 2:718.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Mar 27 2020

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Quantum-enhanced fiber-optic gyroscopes using quadrature squeezing and continuous variable entanglement'. Together they form a unique fingerprint.

Cite this