1. In-Line Mach–Zehnder Interferometers Based on a Capillary Hollow-Core Fiber Using Vernier Effect for a Highly Sensitive Temperature Sensor
- Author
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Ivan Hernandez-Romano, Miguel Torres-Cisneros, Vladimir P. Minkovich, S. Marrujo-García, and Daniel A. May-Arrioja
- Subjects
Mach–Zehnder interferometer ,Materials science ,Fabrication ,Hot Temperature ,Capillary action ,TP1-1185 ,Biochemistry ,Temperature measurement ,Article ,Analytical Chemistry ,Vernier effect ,Astronomical interferometer ,Fiber ,Sensitivity (control systems) ,Electrical and Electronic Engineering ,Instrumentation ,Multi-mode optical fiber ,business.industry ,optical fiber sensors ,Chemical technology ,Temperature ,Atomic and Molecular Physics, and Optics ,Refractometry ,Interferometry ,Optoelectronics ,business ,capillary hollow-core fiber - Abstract
In this paper, we propose a highly sensitive temperature sensor based on two cascaded Mach–Zehnder interferometers (MZIs) that work using the Vernier effect. The all-fiber MZIs were assembled by splicing a segment of capillary hollow-core fiber (CHCF) between two sections of multimode fibers (MMFs). This cascaded configuration exhibits a temperature sensitivity of 1.964 nm/°C in a range from 10 to 70 °C, which is ~67.03 times higher than the sensitivity of the single MZI. Moreover, this device exhibits a high-temperature resolution of 0.0153 °C. A numerical analysis was carried out to estimate the devices’ temperature sensitivity and calculate the magnification of the sensitivity produced by the Vernier effect. The numerical results have an excellent agreement with the experimental results and provide a better insight into the working principle of the MZI devices. The sensor’s performance, small size, and easy fabrication make us believe that it is an attractive candidate for temperature measurement in biological applications.
- Published
- 2021