Single-mode fiber OTDR: Experiment and theory

Philen, D.L.; White, I.A.; Kühl, J.; Mettler, Stephen C.

doi:10.1109/jqe.1982.1071408

Cited by 41 publications

(15 citation statements)

References 18 publications

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“…The OTDR has been found to be very powerful to measure backscattering [10]. A short pulse of light is launched in the fiber and the backscattered signal is monitored as a function of distance along the fiber.…”

Section: Experimental Investigated Of Back-reflection and Backscattermentioning

confidence: 99%

Noise analysis and measurement of high sensitivity photonic crystal fiber-optic gyroscope

Teng

Jin

Huang

et al. 2015

Optical Fiber Technology

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Section: Experimental Investigated Of Back-reflection and Backscattermentioning

confidence: 99%

Noise analysis and measurement of high sensitivity photonic crystal fiber-optic gyroscope

Teng

Jin

Huang

et al. 2015

Optical Fiber Technology

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“…Generally, a fiber optic sensor will consist of a source of light, sensing and transmission fiber, a photo detector, demodulator, processing and display optics [17]. Fiber optic sensor can be categorized into three groups [25]: interferometric sensors [78], distributed sensors [50] and grating-based sensors [43,74]. In SHM applications, the most popular are Extrinsic FOS: Extrinsic Fabry-Perot in- terferometric (EPFI - Fig.…”

Section: Common Smh Sensors and Actuatorsmentioning

confidence: 99%

Structural Health Monitoring (SHM) Methods in Machine Design and Operation

Barski¹,

Kędziora²,

Muc³

et al. 2014

Archive of Mechanical Engineering

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The present paper is devoted to the discussion and review of the non-destructive testing methods mainly based on vibration and wave propagation. In the first part, the experimental methods of actuating and analyzing the signal (vibration) are discussed.The piezoelectric elements, fiber optic sensors and Laser Scanning Doppler Vibrometer (SLDV) method are described. Effective detecting of the flaws needs very accurate theoretical models. Thus, the numerical methods, e.g. finite element, spectral element method and numerical models of the flaws in isotropic and composite materials are presented. Moreover, the detection of the damage in structures, which are subjected to cyclic or static loads, is based on the analyzing of the change in natural frequency of the whole structure, the change of internal impedance of the material and the change in guided waves propagating through the investigated structure. All these cases are characterized in detail. At the end of this paper, several applications of the structural health monitoring systems in machine design and operation are presented.

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“…For time and frequency synchronization network, FTD measurement is a key step to realize clock synchronization [11][12][13][14]. Ordinarily, the time delay is measured in time domain, such as using the time interval counter (TIC) [15] or optical time domain reflectometer (OTDR) [16], but they have drawbacks of low accuracy and existing dead zones. Recently, efforts have been made to meet requirements of large dynamic range and high accuracy based on propagation delay measurement in frequency domain [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Highly accurate fiber transfer delay measurement with large dynamic range

et al. 2016

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A novel and efficient method for fiber transfer delay measurement is demonstrated. Fiber transfer delay measurement in time domain is converted into the frequency measurement of the modulation signal in frequency domain, accompany with a coarse and easy ambiguity resolving process. This method achieves a sub-picosecond resolution, with an accuracy of 1 picosecond, and a large dynamic range up to 50 km as well as no measurement dead zone. References and links1. B. Mukherjee, "WDM optical communication networks: progress and challenges," IEEE J. Sel. Areas Comm.18(10), 1810-1824 (2000). 2. B. Lee, "Review of the present status of optical fiber sensors," Opt. Fiber Technol. 9(2), 57-79 (2003).

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Single-mode fiber OTDR: Experiment and theory

Cited by 41 publications

References 18 publications

Noise analysis and measurement of high sensitivity photonic crystal fiber-optic gyroscope

Noise analysis and measurement of high sensitivity photonic crystal fiber-optic gyroscope

Structural Health Monitoring (SHM) Methods in Machine Design and Operation

Highly accurate fiber transfer delay measurement with large dynamic range

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