Hollow-Core Photonic Crystal Fiber Based on C<sub>2</sub>H<sub>2</sub> and NH<sub>3</sub> Gas Sensor

Abstract

In this paper, we propose a new hollow-core photonic crystal fiber, which can be available for gas sensor. In addition, properties of the fiber are analyzed at the wavelength of C 2 H 2 and NH 3 absorption peak 1530nm and 1967nm, respectively. For both wavelengths, relative sensitivity coefficients are higher than 0.95, which makes sense in gas sensing. We also get relationship between relative sensitivity coefficient and radius of fiber core, as well as effective refractive index of the mode field.