Analysis of fiber Bragg grating with exponential–linear and parabolic taper profiles for dispersion slope compensation in optical fiber links

Hessainia, Amara; El-Akrmi, S.; Triki, Houria; El-Akrmi, A.

doi:10.1016/j.ijleo.2014.05.029

Cited by 9 publications

(4 citation statements)

References 18 publications

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“…The higher group delay expands propagation pulses which leads to inter-symbol interference of the signal. As a result, noise come apparent in the signal which leads to data loss of the actual signal [14,15]. Hence, the tapering of these waveguide-based sensors provides an extra degree of freedom to control the sensing performance.…”

Section: Introductionmentioning

confidence: 99%

Enhanced sensing performance of tapered profile in the apodized fiber Bragg grating for detection of cancerous cells utilizing their refractive index

Maiti,

Prakash,

Singh

2023

Journal of Biophotonics

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Tapered profiles are introduced in Bessel and Blackman apodized fiber Bragg grating, and their sensing performance is theoretically estimated. Reflectivity equation of proposed apodized tapered profiles is obtained using transfer matrix method and coupled mode theory. Since the effective refractive index of proposed waveguides varies with core radius therefore amplitude distribution and penetration depth of light in surrounding are modified. It is found that exponential tapered profile with Bessel apodization shows higher sensitivity 682.5 nm/RIU, detection accuracy 3858.45, and quality parameter 1718.02 /RIU with minimum FWHM 0.3972 nm of the reflection spectra. Spectral response of the tapered fiber Bragg grating is also analyzed through group delay study. Again, exponential profile was found to be particularly effective, producing less group delay ripples 2.98 ps and is maximum slope of 42.43 degree. Hence, exponential tapered profile is demonstrated for detection of cancer cells lies between the refractive index of 1.3333 to 1.4412.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Enhanced sensing performance of tapered profile in the apodized fiber Bragg grating for detection of cancerous cells utilizing their refractive index

Maiti,

Prakash,

Singh

2023

Journal of Biophotonics

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“…By far, optical fiber sensors have made major achievements in dams [1][2][3][4], tunnels [5,6], slopes [7,8], and bridges [9,10]. However, the research into optical fiber sensors applied to dikes is limited.…”

Section: Introductionmentioning

confidence: 99%

Optical Fiber Sensor Experimental Research Based on the Theory of Bending Loss Applied to Monitoring Differential Settlement at the Earth-Rock Junction

et al. 2015

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Considering the differential settlement in the junction between the structure perpendicular to the dike and the body and foundation of dike (called the earth-rock junction in this paper) during runtime, an experimental investigation of optical fiber sensor monitoring was conducted. Based on the sensing mechanism of single-mode optical fiber bending loss, the experiment focused on the influence of the bending radius of an optical fiber on the bending loss. In view of the characteristics of the differential settlement in the earth-rock junction, we designed a butterfly-type optical fiber sensor and composite optical fiber sensor for monitoring device in monitoring the differential settlement to enlarge the monitoring range and improve the sensibility of optical fiber sensor. Based on the research on the working principle and bending properties of the composite optical fiber monitoring device, we conducted experiments on the bending of the composite optical fiber sensor monitoring device and the use of the device for monitoring the differential settlement. These experiments verified the feasibility of the composite optical fiber sensor monitoring device at monitoring the differential settlement in the earth-rock junction.

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“…This indicates the potential usage of TFBGs as tunable dispersion compensators for telecommunications and adjustable optical delay lines for microwave photonics applications. Additionally, as in classical chirped fiber Bragg gratings (CFBGs), the use of apodization reduces group delay ripple [11,12]. However, analysis of chirped FBGs shows that apodization results in shortening of the effective grating length, and thus reduction of the reflection band is observed [13].…”

Section: Introductionmentioning

confidence: 99%

“…Namely, using this method, only the group delay relation can be obtained and modeling TFBGs with arbitrary shapes of the taper is difficult because there is a need to define taper profile in analytical form. Thus, studies are usually limited to the linear, exponential, or parabolic profiles [12,20]. Finally, in the case of tapered structures with significantly reduced fiber diameters, the influence of geometry on effective refractive index and mode field diameter of the propagating mode is not always considered [21].…”

Section: Introductionmentioning

confidence: 99%

Numerical model of tapered fiber Bragg gratings for comprehensive analysis and optimization of their sensing and strain-induced tunable dispersion properties

2015

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A versatile numerical model for spectral transmission/reflection, group delay characteristic analysis, and design of tapered fiber Bragg gratings (TFBGs) is presented. This approach ensures flexibility with defining both distribution of refractive index change of the gratings (including apodization) and shape of the taper profile. Additionally, sensing and tunable dispersion properties of the TFBGs were fully examined, considering strain-induced effects. The presented numerical approach, together with Pareto optimization, were also used to design the best tanh apodization profiles of the TFBG in terms of maximizing its spectral width with simultaneous minimization of the group delay oscillations. Experimental verification of the model confirms its correctness. The combination of model versatility and possibility to define the other objective functions of Pareto optimization creates a universal tool for TFBG analysis and design.

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Analysis of fiber Bragg grating with exponential–linear and parabolic taper profiles for dispersion slope compensation in optical fiber links

Cited by 9 publications

References 18 publications

Enhanced sensing performance of tapered profile in the apodized fiber Bragg grating for detection of cancerous cells utilizing their refractive index

Enhanced sensing performance of tapered profile in the apodized fiber Bragg grating for detection of cancerous cells utilizing their refractive index

Optical Fiber Sensor Experimental Research Based on the Theory of Bending Loss Applied to Monitoring Differential Settlement at the Earth-Rock Junction

Numerical model of tapered fiber Bragg gratings for comprehensive analysis and optimization of their sensing and strain-induced tunable dispersion properties

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