Tipped Fiber Bragg Grating sensor for concentration measurements

Abstract

An optical fiber sensing system for concentration measurement, based on Tipped Fiber Bragg Grating is presented. Laser Diode (LD) with wavelength of 1550 nm has been used. The Fiber Bragg Grating is cleaved by using optical cleaver. The FBG tip is immersed in different concentrations of Sodium Chloride (Nacl) solutions range from 5% to 25% and Sucrose solutions range from 10% to 50%. As the concentration of solution increases the shift in Bragg wavelength toward red region increases. The sensitivities of this sensor for different concentrations of Nacl solutions and Sucrose solutions are . × − µm/(%w/v) and . × − µm/(% w/v),respectively.. Index Terms-optical fiber sensor, concentration, Tipped Fiber Bragg Grating, sensitivity, wavelength shift.

Novel method of dual fiber Bragg gratings integrated in fiber ring laser for biochemical sensors

“…Optical fiber sensors offer very attractive solutions over conventional measurement technologies due to some unique characteristics such as multiplexing capabilities, high sensitivity, fast response, and immunity to electromagnetic interference, and enable remote in situ sensing of species in difficult or hazardous environments [1,2]. Fiber Bragg gratings (FBGs) have been demonstrated as optical sensors for various applications [3][4][5][6][7][8][9], especially for chemical and biochemical sensing [10][11][12][13][14][15]. In various chemical and biochemical applications, refractive index sensing is important since several substances can be detected by the measurement of refractive indices.…”