Gas monitoring in mines and tunnels is the key to ensuring safe production. Nowadays,
optical fiber gas sensors depend on the advantages of nonelectrical signal transmission …

Reliable and accurate measurements of temperature and strain in structures subjected to
fire can be difficult to obtain using traditional sensing technologies based on electrical …

High-temperature measurements are of significant importance in various harsh-environment
engineering fields, such as fossil fuel production, and the metallurgical and aviation …

In this paper, we propose and demonstrate a spectral splicing method (SSM) for distributed
strain sensing based on optical frequency domain reflectometry (OFDR), which can achieve …

Metal coatings can protect the fragile optical fiber sensors and extend their life in harsh
environments. However, simultaneous high-temperature strain sensing in a metal-coated …

We present a miniaturized optical fiber tip Fabry-Perot interferometer for high-temperature
measurement based on a concave-shaped cavity. The fabrication process of the diaphragm …

Abstract A SMF-MMF-SMF-ultra long period fiber grating (SMS-ULPFG) sensor is proposed
for the simultaneous measurement of axial strain and temperature. The all-optical fiber …

An in-line fiber sensor for simultaneous measurement of refractive index (RI) and
temperature is proposed and demonstrated. The sensor head is composed of an asymmetric …

We have demonstrated a high-sensitivity strain sensor based on a novel photonic crystal
fiber (PCF) interferometer by means of splicing two sections of thin core fibers (TCF) with a …

In the aerospace field, for aerospace engines and other high-end manufacturing equipment
working in extreme environments, like ultrahigh temperatures, high pressure, and high …