Novel Monitoring Technique for Passive Optical Networks Based on Optical Frequency Domain Reflectometry and Fiber Bragg Gratings

Yüksel, Kıvılcım; Wuilpart, Marc; Moeyaert, Veronique; Mégret, Patrice

doi:10.1364/jocn.2.000463

Cited by 27 publications

(5 citation statements)

References 11 publications

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“…The third approach consists in analyzing the radio-frequency spectrum, where a different frequency is associated with each branch. The frequency feature can be generated by Brillouin frequency shifts of the fiber [29], the resonance frequency between laser and reflector [30], [31], and the cavity mode of the "self-injection locked reflective semiconductor optical amplifier" (SL-ROSA) [32], which replaces the laser in the ONU.…”

Section: Introductionmentioning

confidence: 99%

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

et al. 2015

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We propose a method with high spatial resolution to detect fiber faults in a time-division multiplexing passive optical network (TDM-PON). A semiconductor laser serving as the probe light source is subjected to self-feedback caused by reflection at fiber faults. The feedback will induce the laser to generate chaos. Autocorrelation of the output time series shows the external cavity signature and, therefore, indicates the distance between the laser and the fiber fault. Each branch is identified by the marker that is formed by the inserted fiber Bragg grating (FBG) providing the feedback in each branch, and the faulty branch can be distinguished by the marker that has disappeared. Our proof-of-concept experiment demonstrates the identification of the faulty branch and the location of the fault point in an optical network simultaneously. This is achieved with a 6-km feeder fiber and realizes the 8-mm spatial resolution.

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Section: Introductionmentioning

confidence: 99%

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

et al. 2015

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“…e Rayleigh-based Optical Frequency Domain Reflectometry (OFDR) technique adopted in this paper can consider the optic fiber as continuously distributed Fiber Bragg Gratings (FBG) with weak random periods [17,18]. As the temperature changes, the density, refractive index, and free energy of optic fiber will change and further induce the shift of Rayleigh scattering spectrum [19].…”

Section: How To Reduce the Effect Of Temperature On The Fiber Strain Measurementsmentioning

confidence: 99%

Crack Detection of Reinforced Concrete Member Using Rayleigh‐Based Distributed Optic Fiber Strain Sensing System

Tingjin

Huang

Yang

2020

Advances in Civil Engineering

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Early detection of crack is critical for the maintenance of reinforced concrete (RC) structures. In this study, a distributed optical fiber (DOF) sensing system with Rayleigh Optical Frequency Domain Reflectometry (OFDR) technique was deployed to a member of RC structure in a full-scale laboratory experiment, which was subjected to a monotonic lateral load. With the aid of a high space resolution (up to 1 mm) and measurement accuracy (±1 micro strain) interrogator (OSI-S by Semicon), continuous strain measurements inside of the RC member are elaborately implemented. The result of crack detection by the analysis of the measured tensile strain profiles is in excellent agreement with the visually observable cracks mapped during the test. This confirms the ability of the optical fiber inside of RC members to capture cracks on concrete surface. Moreover, the recognition of crack orientation and depth is accomplished by comparing strain measurements of optical fibers installed at multiple locations.

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“…OFDR (Optical Frequency Domain Reflectometry) is a technique for high-resolution metrology that can find applications in both optical fiber sensors and telecommunication networks [11]. Fig.…”

Section: Sensor Principlementioning

confidence: 99%

Complete Analysis of Multireflection and Spectral-Shadowing Crosstalks in a Quasi-Distributed Fiber Sensor Interrogated by OFDR

et al. 2012

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Abstract-We present the analysis of a quasi-distributed fiber sensor based on the concatenation of identical low-reflective fiber Bragg gratings (FBGs) taking into account both multireflection and spectral-shadowing crosstalks. This allows obtaining more realistic values of the design parameters such as the maximum number of sensing points, the reflectivity of the gratings, and the distance between the sensing points.Index Terms-Fiber Bragg gratings (FBGs), fiber optics sensors, interferometry, optical frequency domain reflectometer (OFDR).

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Novel Monitoring Technique for Passive Optical Networks Based on Optical Frequency Domain Reflectometry and Fiber Bragg Gratings

Cited by 27 publications

References 11 publications

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

Crack Detection of Reinforced Concrete Member Using Rayleigh‐Based Distributed Optic Fiber Strain Sensing System

Complete Analysis of Multireflection and Spectral-Shadowing Crosstalks in a Quasi-Distributed Fiber Sensor Interrogated by OFDR

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