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Updated: Jul 4, 2026
A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
Laser-micromachined Fabry-Perot optical fiber tip sensor for high-resolution temperature-independent measurement of
1Key Lab of Broadband Optical Fiber Transmission & Communication Networks (Ministry of Education of China) University of Electronics Science and Technology of China, Chengdu, Sichuan, 610054, China.
Abstract:
We propose and demonstrate a Fabry-Perot (F-P) optical fiber tip sensor for high-resolution refractive-index measurement fabricated by using 157-nm laser micromachining, for the first time to our knowledge. The sensor head consists of a short air F-P cavity near the tip of a single-mode fiber and the fiber tip. The external refractive index is determined according to the maximum fringe contrast of the interference fringes in the reflective spectrum of the sensor. Such a sensor can provide temperature-independent measurement of practically any refractive index larger than that of air and offers a refractive-index resolution of ~4 x 10(-5) in its linear operating range. The experimental data agree well with the theoretical results.
