AI Article Synopsis
- The anti-resonance (AR) effect in optical waveguides operates independently of the multimode interference (MMI) effect.
- Bending the fiber can diminish MMI and modify AR spectra from various modes in a specific optical fiber structure.
- This leads to a temperature sensor with a high sensitivity of -3.784, leveraging the properties of the polymer coating and resulting in sharp transmission dips.
Article Abstract
Compared to the multimode interference (MMI) effect, the anti-resonance (AR) effect does not rely on the multimode property of the optical waveguide. This Letter shows that fiber bending can suppress the MMI and can break the superposition of AR spectra of multiple modes in a high-index polymer-coated optical fiber interferometer based on a single-mode fiber-polymer-coated no-core fiber-single-mode fiber hetero-structure. This results in the dominance of the AR spectrum of an individual mode and consequently in periodic sharp transmission dips. As a result of this phenomenon and large thermo-optical and thermal expansion coefficients of the polymer, a compact, high-sensitivity and linear response temperature sensor with the sensitivity as high as -3.784/ has been demonstrated experimentally.
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| http://dx.doi.org/10.1364/OL.403050 | DOI Listing |
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