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All Journal Komunikasi Fisika Indonesia JOURNAL ONLINE OF PHYSICS Spektra: Jurnal Fisika dan Aplikasinya Unri Conference Series: Community Engagement PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Science, Technology, and Communication Journal
Rahmondia Nanda Setiadi
Department Of Physics, Faculty Of Mathematics And Natural Sciences, University Of Riau, Indonesia
Aerospace Engineering Humanities Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Other

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Comparison of sensitivity and thermal response of chirped fiber Bragg gratings at various degrees of bending Saktioto Saktioto; Titis Oktiva Sari; Rakhmawati Farma; Rahmondia Nanda Setiadi; Tengku Emrinaldi; Defrianto Defrianto
Indonesian Physics Communication Vol 23, No 2 (2026)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.23.2.133-136

Abstract

The development of optical fiber sensors based on Fiber Bragg Grating (FBG) has driven the need for a deeper understanding of sensor characteristics under mechanical deformation conditions. This study is motivated by the limited investigations specifically examining the simultaneous interaction between bending and thermal response in chirped FBG. This research aims to analyze the effect of bending degree on the sensitivity and thermal response of Chirped Fiber Bragg Grating (CFBG), to observe Bragg wavelength (λB) shifts and transmission power variations, and to determine the optimal bending configuration. Measurements were conducted using a dual laser source at wavelengths of 1310 nm and 1550 nm, with bending angle variations of 0°, 10°, 20°, 30°, and 40°, across a temperature range of 35°C to 49°C representing human physiological conditions. Results demonstrate that bending degree exerts a substantially more dominant influence on transmission power than temperature variation, with inter-angle power differences exceeding 12 dB. Bending angles of 20° and 30° consistently yielded the highest transmission power, with sensitivity values reaching 1555.72% and 1527.37% respectively at 1550 nm. The 1310 nm wavelength exhibited slightly higher sensitivity, whereas the 1550 nm demonstrated better thermal response stability. This research contributes to establishing optimal operating conditions for CFBG sensors in wearable health monitoring applications requiring high sensitivity and reliable thermal stability.
Apodization profiles of fiber Bragg grating spectra in temperature sensor applications Septia Putri Ayu; Saktioto Saktioto; Rakhmawati Farma; Rahmondia Nanda Setiadi
Science, Technology, and Communication Journal Vol. 7 No. 1 (2026): SINTECHCOM Journal (October 2026)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v7i1.383

Abstract

The presence of side lobes in the FBG reflection spectrum is a critical challenge that can reduce measurement accuracy in optical sensor applications, necessitating a systematic evaluation of apodization techniques as a mitigation strategy. This study investigated the comparative effects of three apodization profiles, namely uniform, Gaussian, and tanh hyperbolic, on the spectral characteristics and performance of an sensors-based temperature sensor with a grating length of 10 mm, grating period of 0.535 µm, modulation index of 0.0001, and operating wavelength of 1550 nm, over a temperature range of 20°C to 100°C. The results showed that all three profiles produced an identical thermal sensitivity of 13.725 pm/°C with a deviation of 3.23% from the theoretical value of 14.183 pm/°C. The Gaussian profile demonstrated the most superior side lobe suppression with an average side lobe level (SLL) of -45.51 dB, exceeding the minimum standard of -20 dB by more than 25 dB, far surpassing the uniform (-16.90 dB) and tanh (-18.17 dB) profiles. These findings establish the Gaussian apodization profile as the most optimal configuration, delivering the highest spectral quality without compromising thermal sensitivity.
Co-Authors Anita, Sofia Antonius Surbakti Budi Astuti Dedi Permana Defrianto Defrianto Elfitah Ramadhani Triana Erman Taer Erwin Amiruddin Erwin Amiruddin Ferdy Alfian Indra Prasetya Ihsan Okta Harmailil Indah Nurhidayah Juandi Juandi Khairul Ihsan Lazuardi Umar Lazuardi Umar Minarni Minarni Mohammad Fisal Rabin Rakhmawati Farma Ramdani Ramdani Rini, Ari Sulistyo Saktioto Saktioto Saktioto Saktioto Salomo Salomo Salomo Sinuraya Septia Putri Ayu Syamsudhuha Syamsudhuha Tasyha Dwi Safira Tengku Emrinaldi Titis Oktiva Sari Usman Malik Valendio Febriano Vira Annisa Rosandi Widyaningrum Indrasari Yan Soerbakti Yolanda Rati Zulharman Zulharman