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Publication

Nonlinear optical magnetometry with accessible in situ optical squeezing

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Publication Type
Journal
Journal Name
Optics Letters
Publication Date
Volume
39
Issue
22

We demonstrate compact and accessible squeezed-light magnetometry using four-wave mixing in a single hot rubidium vapor cell. The strong intrinsic coherence of the four-wave mixing process results in nonlinear magneto-optical rotation (NMOR) on each mode of a two-mode relative-intensity squeezed state. This framework enables 4.7 dB of quantum noise reduction while the opposing polarization rotation signals of the probe and conjugate fields add to increase the total signal to noise ratio.