New SU(1,1) interferometer shows nonlinear phase effects in passive and active modes, suggesting advances in on-chip precision phase sensing.
We report an SU(1,1) interferometer in both passive and active modes, realized in a micro-ring made of high-index silica glass. Nonlinear phase-dependent fringes 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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