High-resolution interrogation technique for fiber Bragg grating strain sensor using long period grating pair and EDF

2000 ◽  
Author(s):  
Jaehoon Jung
Keyword(s):  
High Resolution ◽  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Bragg Grating ◽  
Long Period Grating ◽  
Long Period ◽  
Interrogation Technique ◽  
Grating Pair

Strain/Temperature Discrimination Using Combined Fiber Bragg Grating and Long Period Grating Sensors

1996 ◽  
Author(s):  
H. Patrick ◽  
G. M. Williams ◽  
A. D. Kersey ◽  
J. R. Pedrazzani ◽  
A. M. Vengsarkar
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Long Period Grating ◽  
Long Period

scholarly journals Hybrid LPG-FBG Based High-Resolution Micro Bending Strain Sensor

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 22
Author(s):  
Song-Bi Lee ◽  
Young-Jun Jung ◽  
Hun-Kook Choi ◽  
Ik-Bu Sohn ◽  
Joo-Hyeon Lee
Keyword(s):  
High Resolution ◽  
Femtosecond Laser ◽  
Practical Method ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Practical Implementation ◽  
Long Period Grating ◽  
Optical Wave ◽  
Long Period ◽  
Signal Pattern

Sensitivity and reliability are essential factors for the practical implementation of a wearable sensor. This study explores the possibility of using a hybrid high-resolution Bragg grating sensor for achieving a fast response to dynamic, continuous motion and Bragg signal pattern monitoring measurement. The wavelength shift pattern for real-time monitoring in picometer units was derived by using femtosecond laser Bragg grating processing on an optical wave path with long-period grating. The possibility of measuring the demodulation system’s Bragg signal pattern on the reflection spectrum of the femtosecond laser precision Bragg process and the long-period grating was confirmed. By demonstrating a practical method of wearing the sensor, the application of wearables was also explored. It is possible to present the applicability of sophisticated micro transformation measurement applications in picometer units.

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