High-temperature measurements above 1000° C are critical in harsh environments such as
aerospace, metallurgy, fossil fuel, and power production. Fiber-optic high-temperature …

A review is presented on high temperature measurement technology based on sapphire
optical fiber. This review paper focuses on the sensing theory, sensor structures and sensing …

The potential to use single-crystal sapphire optical fiber as an alternative to silica optical
fibers for sensing in high-temperature, high-pressure, and chemically aggressive harsh …

A high-temperature sensor based on a Mach–Zehnder interferometer (MZI) in a
conventional single-mode optical fiber is proposed and fabricated by concatenating two …

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

We present an ultra-small all-silica high temperature sensor based on a reflective Fabry-
Perot modal interferometer (FPMI). Our FPMI is made of a micro-cavity (~ 4.4 μm) directly …

This paper reports on a new kind of temperature sensor operating over an extremely large
temperature range at high monitoring speeds. The sensor utilizes fiber Bragg gratings …

In this Letter we present a high temperature multipoint sensing method using sapphire fiber
air gap-based extrinsic Fabry–Perot interferometers. Three sensors are fabricated and …

We developed planar multilayered photonic–plasmonic structures, which support
topologically protected optical states on the interface between metal and dielectric materials …

A sapphire fiber high temperature sensor based on Fabry-Perot interference was studied in
the paper. A sapphire wafer served as the Fabry-Perot cavity was fixed to the end face of the …