Affiliation:
1. Wuyi University
2. Max Planck Institute for the Science of Light
3. Zhengzhou University
Abstract
Fiber-optic sensors are an indispensable element of modern sensing technologies by virtue of their low cost, excellent electromagnetic immunity, and remote sensing capability. Optical Vernier effect is widely used to enhance sensitivity of fiber-optic sensors but requires bulky and complex cascaded interferometers. Here we propose and experimentally demonstrate an ultracompact (∼2 mm by ∼2 mm) Vernier-effect-improved sensor by only using a single microfiber-knot resonator. With the Vernier effect achieved by controlling the optical beating with the spectral ripple of a super light emitting diode (SLED), we show ∼20x sensitivity enhancement for quantitative temperature monitoring. Our sensor creates a new practical method to realize Vernier effect in fiber-optic sensors and beyond.
Funder
National Natural Science Foundation of China
Japan Society for the Promotion of Science
Murata Science Foundation
Natural Science Foundation of Guangdong Province
Innovation and Strong School Engineering Fund of Guangdong Province
Guangdong Engineering Technology Research Center
Subject
Atomic and Molecular Physics, and Optics
Cited by
5 articles.
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