Thermal regenerated grating operation at temperatures up to 1400°C using new class of multimaterial glass-based photosensitive fiber

Abstract

The work demonstrates for the first time a thermal regenerated grating (RG) operating at an ultra-high temperature up to 1400°C. A new class of photosensitive optical fiber based on erbium-doped yttrium stabilized zirconia-calcium-alumina-phospho silica (Er-YZCAPS) glass is fabricated using modified chemical vapor deposition (MCVD) process, followed by solution doping technique and conventional fiber drawing. A type-I seed grating inscribed in this fiber is thermal regenerated based on the conventional thermal annealing technique. The investigation result indicates that the produced RG has an ultrahigh temperature sustainability up to 1400°C. The measured temperature sensitivities are 14.1 and 15.1 pm/°C for the temperature ranges of 25°C-1000°C and 1000°C-1400°C, respectively.

Hollow Core Fiber Based Interferometer for High-Temperature (1000 °C) Measurement

“…The maximum temperature sensitivity of 33.4 pm/°C is achieved at the temperature around 1000 °C for the sensor after being annealed at 1005 °C , which is over two times higher than many temperature sensors reported recently [9,13,17]. It is noted that the measured maximum sensitivity is larger than our theoretically calculated temperature sensitivity of 25 pm/°C , this is possibly because the TOC () of the HCF cladding is temperature dependent and it has a higher value of  at high temperatures.…”

“…By utilizing an intensive UV laser source or femtosecond pulse duration infrared (fs-IR) laser source, other types of gratings can be inscribed. The working temperature of these kinds of grating sensors can be extended to over 1000 °C [7][8][9]. However, the fabrication process for such gratings is rather complicated and expensive [10].…”

Influence of Internal Stresses in Few-Mode Fiber on the Thermal Characteristics of Regenerated Gratings

“…Besides that, an ultra-high temperature RG in boron-codoped germanosilicate optical fiber using 193 nm ArF excimer laser over 1000 ℃ was presented by Bandyopadhyay et al [8]. Yang et al demonstrated the RG inscribed in new glass composition-based photosensitive fiber with temperature resistance up to 1400℃ [9]. Our earlier investigation [10] has proven that the pre-treatment process has a profound impact on the performance of the RG in terms of temperature resistant and durability.…”

Tapered Polymer Fiber Sensors for Reinforced Concrete Beam Vibration Detection

“…In general, a typical SHM system comprises the integration of sensor techniques [1], smart materials, data interrogation and transmission, computational power, and processing ability inside the structures. Among these components in an SHM system, sensor technique plays an important role in monitoring not only the structural status—such as stress, displacement, acceleration, and vibration [2,3,4]—but also the influential environment parameters, for instance, wind speed, temperature, and others [5,6]. Reinforced concrete (RC) beam vibration detection provides tremendous information that indicates the health of a building.…”