Temperature-Compensated Multifunctional All-Fiber Sensors for Precise Strain/High-Pressure Measurement

Fiber-Optic Microstructure Sensors: A Review

“…This semi-open FP cavity structure can make use of a Fresnel reflection to form a hybrid FP structures. For sealed I-EFPI, it is formed by splicing a fiber with a micro-hole and a cleaved fiber [5,6,125]. Its fabrication process mainly has two steps.…”

“…Among manifold fiber-optic sensors, the fiber-optic microstructure (FOM) sensor, formed by introducing microstructure into optical fiber, is one of the most important devices since it offers unique characteristics of high sensitivity, high resolution, and excellent distributing and multiplexing capabilities. To date, the FOM sensors mainly include fiber Bragg grating (FBG) sensors [1,2], long-period fiber grating (LPFG) sensors [3,4], Fabry-Perot interferometer (FPI) sensors [5,6], Mach-Zehnder interferometer (MZI) sensors [7,8], Michelson interferometer (MI) sensors [9,10], and Sagnac interferometer (SI) sensors [11,12]. Each FOM sensor possesses abundant structures and its fabrication technologies are also various, including chemical etching [13], excimer laser micromachining [14], femtosecond laser micromachining [15], CO 2 laser micromachining [16], focused ion beams (FIB) milling [17], and kinds of coating technologies, just to name a few.…”

Conductive Polymer‐Based Bioelectronic Platforms toward Sustainable and Biointegrated Devices: A Journey from Skin to Brain across Human Body Interfaces

“…To reach this goal, single multifunctional material sensors capable of discriminating and transducing different stimuli into distinct recordable signals are a promising approach. [338] A successful application is reported in the work of Han et al where an aerogel made of cellulose nanofibrils and PEDOT:PSS proved fully decoupled pressuretemperature sensing capabilities, exploiting DMSO as a dopant for decreasing the resistance from around 2 kΩ to 44 Ω, thus enhancing the pressure sensitivity up to 2 × 10−5 A Pa −1 . Additionally, the DMSO treatment leads to a change in the charge transport mechanism from thermally activated hopping to temperature-independent transport, causing the decoupling between temperature and pressure readings within the same active material.…”

“…To reach this goal, single multifunctional material sensors capable of discriminating and transducing different stimuli into distinct recordable signals are a promising approach. [ 338 ] A successful application is reported in the work of Han et al. where an aerogel made of cellulose nanofibrils and PEDOT:PSS proved fully decoupled pressure–temperature sensing capabilities, exploiting DMSO as a dopant for decreasing the resistance from around 2 kΩ to 44 Ω, thus enhancing the pressure sensitivity up to 2 × 10−5 A Pa −1 .…”

A High-Strength Strain Sensor Based on a Reshaped Micro-Air-Cavity

“…A variety of fiber-optic sensors for strain sensing applications have been investigated, such as those based on Fiber Bragg Gratings (FBGs) [ 1 , 2 ], helical long-period fiber grating [ 3 ], Fabry–Perot interferometers (FPIs) [ 4 , 5 , 6 , 7 ], Mach–Zehnder interferometers (MZIs) [ 8 , 9 , 10 ], and hybrid structures [ 11 , 12 , 13 ]. Typically, the strain sensors based on fiber-optic FPIs have been widely used in areas of biomedicine, automotive industries, and environmental monitoring [ 14 ], due to their outstanding advantages of high sensitivity, compact size, and simple structure for potentially low-cost fabrication [ 5 ].…”