Abstract:
In this paper, we present an apodized Fiber Bragg grating (FBG) for the single and quasi-distributed sensing applications. Optical characteristics, such as reflectivity, ...Show MoreMetadata
Abstract:
In this paper, we present an apodized Fiber Bragg grating (FBG) for the single and quasi-distributed sensing applications. Optical characteristics, such as reflectivity, Full-Width at Half Maximum (FWHM), and side-lobes of FBG critical for an efficient quasi-distributed sensing networks are optimized for the proposed grating. The coupled-mode theory and transfer matrix method are utilized to establish numerical modeling of apodized FBGs for single and quasi-distributed sensing networks. All the simulations are performed using MATLAB. Simulation results illustrate that for the optimized grating parameters L = 10 mm and δ̅n=0.8 ×10-4, the proposed grating is characterized with reflectivity of 0.532, FWHM of 0.132 nm, Maximum Side-Lobe (MSL) of -36.25 dB, and Side-Lobe Suppression Ratio (SLSR) of -33.51 dB. Comparative performance analysis of the proposed grating with the elite apodization profiles, Gaussian and Tanh4z, is carried out through simulation. These results illustrate that the proposed grating has better reflectivity and FWHM as compared to Gaussian. It has better side-lobes suppression than Tanh4z apodized FBG structure as well. Generally, an FBG sensor characterized by the high reflectivity, narrower FWHM, and better side-lobes suppression is of great importance in Wavelength Division Multiplexing (WDM) quasi-distributed sensing networks. The optimized grating is utilized for five-stage WDM quasi-distributed strain and temperature sensing networks. A high dynamic strain/temperature range of 1450 μϵ/131.6°C is obtained using this optimized grating. This dynamic range of strain is very suitable for real-field structural health monitoring applications making our proposed grating a suitable candidate for the above mentioned application.
Date of Conference: 15-16 April 2020
Date Added to IEEE Xplore: 19 May 2020
ISBN Information:
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- IEEE Keywords
- Index Terms
- Fiber Bragg Grating ,
- Structural Health Monitoring ,
- Health Monitoring Applications ,
- Structural Health Monitoring Applications ,
- Comparative Analysis ,
- Optical Characteristics ,
- Wavelength Division Multiplexing ,
- Transfer Matrix Method ,
- Coupled Mode Theory ,
- Fiber Bragg Grating Sensors ,
- Optimal Parameters ,
- Changes In Index ,
- Reflectance Spectra ,
- Electromagnetic Interference ,
- Optical Communication ,
- External Perturbations ,
- Gaussian Profile ,
- Function Of The First Kind ,
- Change In Wavelength ,
- Adjacent Channels ,
- Guard Band ,
- Time-division Multiplexing ,
- Multiplex Technique
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Fiber Bragg Grating ,
- Structural Health Monitoring ,
- Health Monitoring Applications ,
- Structural Health Monitoring Applications ,
- Comparative Analysis ,
- Optical Characteristics ,
- Wavelength Division Multiplexing ,
- Transfer Matrix Method ,
- Coupled Mode Theory ,
- Fiber Bragg Grating Sensors ,
- Optimal Parameters ,
- Changes In Index ,
- Reflectance Spectra ,
- Electromagnetic Interference ,
- Optical Communication ,
- External Perturbations ,
- Gaussian Profile ,
- Function Of The First Kind ,
- Change In Wavelength ,
- Adjacent Channels ,
- Guard Band ,
- Time-division Multiplexing ,
- Multiplex Technique
- Author Keywords