Observational analysis shows quantum noise reduction in SU(1,1) interferometers for phase sensing, suggesting potential in high-precision applications.
We report SU(1,1) interferometers in both passive and active modes, realized in a micro-ring made of high-index silica glass. Phase-dependent fringes and quantum noise reduction are observed for potential applications in on-chip precision phase sensing.
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Li et al. (2025) studied this question.
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