Optimizing signal conversion in uniform FBGs with InGaAs photodetectors for medical sensors

Optimizing signal conversion in uniform FBGs with InGaAs photodetectors for medical sensors

Fiber Bragg grating
InGaAs
Photodetector
Reflectivity
Uniform

This study experimentally interrogates the spectral response of uniform fiber Bragg gratings (FBGs) with varying reflectivity levels of 30%, 50%, 70%, and 90% under controlled environmental stimuli. The objective is to elucidate the influence of reflectivity on the wavelength shift behavior of FBGs and to inform the optimal interrogation of these elements with indium gallium arsenide (InGaAs) photodetectors in high-performance sensing systems. Utilizing high-precision measurement procedures and specialized instrumentation, the experiments revealed that the magnitude and pattern of wavelength shifts are significantly influenced by FBG reflectivity. Specifically, lower reflectivity enhances sensitivity, while higher reflectivity contributes to greater spectral stability. These findings highlight the critical role of reflectivity in shaping the spectral modulation characteristics of FBGs, establishing a critical theoretical framework for precision optical sensor systems. The outcomes give significant contributions to the design and calibration of FBG-based sensors, particularly biomedical applications where precision and responsiveness are paramount.

Tengku Emrinaldi1, Bambang Widiyatmoko2, Bunga Meyzia1, Sumiaty Ambran3, Saktioto1,
Mohamad Syahadi2, Agitta Rianaris2, Dwi Hanto2

Journal homepage: http://journal.uad.ac.id/index.php/TELKOMNIKA

May 10, 2025

PERI IRAWAN

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