Design of Superstructure Fiber Bragg Grating With Efficient Mode Coupling for Simultaneous Strain and Temperature Measurement With Low Cross-Sensitivity

Simultaneous Measurement of Temperature and Strain Based on Peak Power Changes and Wavelength Shift Using Only One Uniform Fiber Bragg Grating

“…In this figure, the maximum ∆P is equal to 0.08112 and maximum wavelength shift is 0.74574. According to equation (5), the strain and temperature variations of structure are obtained equal to 503.34με and 24.82℃, respectively.…”

“…optical fiber sensors, owing to their outstanding properties, have been widely developed for measuring temperature, strain, displacement, flow, vibration, bending, pressure, humidity, and etc. They are rapidly drawing interest in measurement of single, dual or multiple physical parameters [1][2][3][4][5][6][7][8][9][10][11]. Simultaneous measurement of temperature and strain is particularly important in many scientific and industrial applications and fiber Bragg grating (FBG) as a special class of optical fiber sensors has been successfully applied to these applications [12][13].…”

Highly Sensitive Temperature Sensor Based on All-Fiber Polarization Interference Filter With Vernier Effect

“…Currently, the development of optical fiber temperature sensors are mainly based on two technical routes: fiber grating based temperature sensors [6][7][8][9][10][11][12][13][14] and fiber interferometer based temperature sensors [15][16][17][18][19][20][21][22][23][24][25][26][27][28]. For fiber grating based temperature sensors, long period grating (LPG) is a common employed device [6][7][8][9][10].…”

“…However, owning to the inherent characteristics of LPG, LPG based temperature sensors are also sensitive to the refractive index, bend, transverse load and so on, which is a barrier to the practical application. Meanwhile, Fiber Bragg Grating (FBG) based temperature sensors have attracted great attention for their stability in the practical application [11][12][13][14]. Grobnic et al have firstly reported a sapphire FBG sensor made by femtosecond laser radiation for ultrahigh temperature sensing [11].…”

“…Zhang et al have designed a novel hydrogen-loaded germanium-doped FBG based hightemperature resistance temperature sensor [12]. Sengupta et al have employed a superstructure FBG to fulfill temperature sensing [13]. In addition, Sridhar et al have proposed a multi-layer MoS 2 coated etched FBG based temperature sensor [14].…”