Temperature insensitive fiber optical displacement sensors based on double fiber Bragg gratings

2013 ◽  
Vol 56 (2) ◽  
pp. 304-306 ◽  
Author(s):  
Ming Jiang ◽  
Liuzhu Cui ◽  
Rong Liu
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Displacement Sensors ◽  
Optical Displacement ◽  
Fiber Optical

scholarly journals Fiber-optical accelerometers based on polymer optical fiber Bragg gratings

2010 ◽  
Author(s):  
Wu Yuan ◽  
Alessio Stefani ◽  
Ole Bang ◽  
Søren Andresen ◽  
Finn Kryger Nielsen ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Polymer Optical Fiber ◽  
Fiber Optical

scholarly journals Femtosecond-Pulsed Laser Written and Etched Fiber Bragg Gratings for Fiber-Optical Biosensing

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2844 ◽  
Author(s):  
Sven Schulze ◽  
Michel Wehrhold ◽  
Carsten Hille
Keyword(s):  
Limit Of Detection ◽  
Fiber Bragg Gratings ◽  
Pulsed Laser ◽  
Bragg Gratings ◽  
Optical Biosensor ◽  
Clinical Samples ◽  
Bragg Wavelength ◽  
Optical Biosensing ◽  
Fiber Optical ◽  
Femtosecond Pulsed Laser

We present the development of a label-free, highly sensitive fiber-optical biosensor for online detection and quantification of biomolecules. Here, the advantages of etched fiber Bragg gratings (eFBG) were used, since they induce a narrowband Bragg wavelength peak in the reflection operation mode. The gratings were fabricated point-by-point via a nonlinear absorption process of a highly focused femtosecond-pulsed laser, without the need of prior coating removal or specific fiber doping. The sensitivity of the Bragg wavelength peak to the surrounding refractive index (SRI), as needed for biochemical sensing, was realized by fiber cladding removal using hydrofluoric acid etching. For evaluation of biosensing capabilities, eFBG fibers were biofunctionalized with a single-stranded DNA aptamer specific for binding the C-reactive protein (CRP). Thus, the CRP-sensitive eFBG fiber-optical biosensor showed a very low limit of detection of 0.82 pg/L, with a dynamic range of CRP detection from approximately 0.8 pg/L to 1.2 µg/L. The biosensor showed a high specificity to CRP even in the presence of interfering substances. These results suggest that the proposed biosensor is capable for quantification of CRP from trace amounts of clinical samples. In addition, the adaption of this eFBG fiber-optical biosensor for detection of other relevant analytes can be easily realized.

Fabrication of superimposed fiber Bragg gratings and applications in fiber laser oscillators

Optik ◽  
2020 ◽  
Vol 214 ◽  
pp. 164583
Author(s):  
Qihao Hu ◽  
Pengrui Wang ◽  
Meng Wang ◽  
Zefeng Wang
Keyword(s):  
Fiber Laser ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Laser Oscillators
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