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- W3174720630 abstract "Sensitivity enhancement was demonstrated in a nonreciprocal fiber cavity operating near the exceptional point (EP). A fiber Bragg grating (FBG) was used to couple a pair of modes propagating in the opposite direction in a fiber ring cavity and give rise to mode splitting in the spectrum. The different roundtrip losses between the two counter-propagating modes showing nonreciprocity is introduced by coupling an extra fiber ring with an isolator. It could enter the EP in the nonreciprocity cavity due to the pair of modes coalesced in both the real and imaginary parts. In order to resolve the weak mode splitting near the EP, the mode linewidth was narrowed by compensating the roundtrip loss by a section of the pumped active fiber. The experimental results showed that a larger change in the mode splitting strength was observed in the nonreciprocity cavity when the temperature in the cavity was controlled by the incident power, indicating an obvious improvement of sensitivity in the EP-based fiber sensor." @default.
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- W3174720630 date "2021-09-01" @default.
- W3174720630 modified "2023-10-06" @default.
- W3174720630 title "Enhancement of Sensitivity Near Exceptional Point by Constructing Nonreciprocal Fiber Cavity Assisted by Isolator and Erbium-Doped Fiber" @default.
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- W3174720630 doi "https://doi.org/10.1109/jsen.2021.3092058" @default.
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