Multiplexed Fiber Bragg Grating Interrogation System Using a Modulated Fiber Bragg Grating and the Tunable-Filter Method

Paterno, Aleksander S.; Oliveira, Valmir de; Figueredo, T.S.; Kalinowski, Hypolito José

doi:10.1109/jsen.2006.881359

Cited by 18 publications

(15 citation statements)

References 16 publications

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“…This fiber filter relies on a mechanical stretch using a piezoelectric element to sweep periodically its resonance. With this arrangement, it is possible to read multiple FBG grating sensors colorblue sequentially [55].…”

Section: Fiber Bragg Grating Sensor Demodulation Techniquesmentioning

confidence: 99%

“…In addition, its measurement speed is slow due to the mechanical movement needed to tune the filters and also they require complicated signal processing for demodulation [53]. While an FBG tuning filter method relies on mechanically strain a fiber Bragg grating using a piezoelectric element, it is limited by the fact that its wavelength scanning range is only a few nanometers [55].…”

Section: Fiber Bragg Grating Sensor Demodulation Techniquesmentioning

confidence: 99%

“…Types of filters commonly used are Fabry-Perot (F-P) [16], acousto-optic filters [58] and also mechanically actuated FBG fibers [21,55]. is to scan over the reflected signal from the FBG.…”

Section: Fbg Demodulation Based On Tunable Optical Filtermentioning

confidence: 99%

“…The analysis is based on the procedure described in [55,48] and [63]. The concepts described here are well known in the FBG literature, and the importance for its exposition lies in their use in the simulations performed later on when our ring resonator is used as an FBG interrogator.…”

Section: Theoretical Analysis Of Scanning and Zero-crossing Detectionmentioning

confidence: 99%

“…The solution from the previous integral have a closed form found in some Calculus books [65]. Thus, the intensity can be compactly written as [55]:…”

Section: Theoretical Analysis Of Scanning and Zero-crossing Detectionmentioning

confidence: 99%

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Silicon Photonic Device for Wavelength Sensing and Monitoring

López¹,

German²

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However, other fields of research such as optical sensor processing can benefit from silicon photonics technology, specially in sensors where the physical measurement is wavelength encoded.In this research work, we present a design and application of a thermally tuned silicon photonic device as an optical sensor interrogator.The main device is a micro-ring resonator filter of 10 µm of diameter. A photonic design toolkit was developed based on open source software from the research community. With those tools it was possible to estimate the resonance and spectral characteristics of the filter. From the obtained design parameters, a 7.8 x 3.8 mm optical chip was fabricated using standard micro-photonics techniques. In order to tune a ring resonance, Nichrome micro-heaters were fabricated on top of the device. Some fabricated devices were systematically characterized and their tuning response were determined. From measurements, vi a ring resonator with a free-spectral-range of 18.4 nm and with a bandwidth of 0.14 nm was obtained. Using just 5 mA it was possible to tune the device resonance up to 3 nm.In order to apply our device as a sensor interrogator in this research, a model of wavelength estimation using time interval between peaks measurement technique was developed and simulations were carried out to assess its performance. To test the technique, an experiment using a Fiber Bragg grating optical sensor was set, and estimations of the wavelength shift of this sensor due to axial strains yield an error within 22 pm compared to measurements from spectrum analyzer.Results from this study implies that signals from FBG sensors can be processed with good accuracy using a micro-ring device with the advantage of ts compact size, scalability and versatility. Additionally, the system also has additional applications such as processing optical wavelength shifts from integrated photonic sensors and to be able to track resonances from laser sources.

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Section: Fiber Bragg Grating Sensor Demodulation Techniquesmentioning

confidence: 99%

Section: Fiber Bragg Grating Sensor Demodulation Techniquesmentioning

confidence: 99%

“…Types of filters commonly used are Fabry-Perot (F-P) [16], acousto-optic filters [58] and also mechanically actuated FBG fibers [21,55]. is to scan over the reflected signal from the FBG.…”

Section: Fbg Demodulation Based On Tunable Optical Filtermentioning

confidence: 99%

Section: Theoretical Analysis Of Scanning and Zero-crossing Detectionmentioning

confidence: 99%

“…The solution from the previous integral have a closed form found in some Calculus books [65]. Thus, the intensity can be compactly written as [55]:…”

Section: Theoretical Analysis Of Scanning and Zero-crossing Detectionmentioning

confidence: 99%

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