Simultaneously two-parameter measurement using tilted fiber grating and long period fiber grating

2017 ◽  
Vol 59 (5) ◽  
pp. 1122-1125 ◽  
Author(s):  
Yi-Lin Yu ◽  
Hzu-Hsuan Hung ◽  
Shien-Kuei Liaw ◽  
Min-Hsiung Shih ◽  
Hiroki Kishikawa ◽  
...  
Keyword(s):  
Parameter Measurement ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating ◽  
Two Parameter

Fiber laser with built-in FBG and LPFG for simultaneous two parameters sensing

Laser Physics ◽  
2021 ◽  
Vol 31 (12) ◽  
pp. 125102
Author(s):  
Dong-Chang Li ◽  
Shien-Kuei Liaw ◽  
Bo-Wei Chen ◽  
Hsin-Che Lee ◽  
Yi-Lin Yu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Dynamic Range ◽  
Laser Cavity ◽  
Liquid Level ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating ◽  
Two Parameters ◽  
Two Parameter

Abstract This work aims to measure the liquid level and temperature at the same time. We propose a fiber laser based on Bragg grating (FBG) and a long-period fiber grating (LPFG) for simultaneously two-parameter sensing. It has one wavelength peak induced by the FBG and one central dip induced by the LPFG. The resulting temperature varies from 25 °C to 50 °C in 7.5 nm wavelength drifts of LPFG with linearity R 2 of 0.9994. The sensitivity of the FBG liquid level sensing will be affected by the temperature change, ranging from—0.12 nm cm−1 at low temperature to—0.004 nm cm−1 at high temperature, and the linearity R 2 is about 0.9967. Thanks to the laser cavity, the proposed fiber laser with an extensive dynamic range could be used for remote monitoring.

Potential-Scanning Sensing for Refractive Index Using an Indium Tin Oxide (ITO)-Coated Long-Period Fiber Grating (LPFG)

2021 ◽  
pp. 1-11
Author(s):  
Takuya Okazaki ◽  
Tatsuya Orii ◽  
Shin-Yinn Tan ◽  
Tomoaki Watanabe ◽  
Akira Taguchi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating

Loading condition estimation using long-period fiber grating array

2020 ◽  
pp. 1-1
Author(s):  
Felipe Oliveira Barino ◽  
Renato Faraco-Filho ◽  
Deivid Campos ◽  
Vinicius N. H. Silva ◽  
Andres P. Lopez-Barbero ◽  
...  
Keyword(s):  
Loading Condition ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Condition Estimation ◽  
Grating Array ◽  
Period Fiber Grating
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