Single-Mode Fiber OTDR: Experiment and Theory

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

doi:10.1109/tmtt.1982.1131282

Cited by 33 publications

(15 citation statements)

References 18 publications

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“…In general, they can be categorized into three classes: interferometric sensors [10,11], distributed sensors [12–14], and grating-based sensors [15–17]. Each category has a large variety targeting diverse types of measurements and applications.…”

Section: Overview Of Fiber Optic Sensor Technologiesmentioning

confidence: 99%

“…OTDR is the first generation of fiber optic distributed sensors, where Rayleigh scattering is used to reflect the attenuation profiles of long-range optical fiber links [12]. An optical pulse is introduced into an optical fiber link and the power of the Rayleigh backscattered light is measured by a photodetector as the light pulse propagates along the fiber link, which is normally used to determine the fiber loss, break locations, and evaluate splices and connectors.…”

Section: Overview Of Fiber Optic Sensor Technologiesmentioning

confidence: 99%

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Fiber Optic Sensors for Structural Health Monitoring of Air Platforms

Guo

Xiao

Mrad

et al. 2011

Sensors

263

115

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Aircraft operators are faced with increasing requirements to extend the service life of air platforms beyond their designed life cycles, resulting in heavy maintenance and inspection burdens as well as economic pressure. Structural health monitoring (SHM) based on advanced sensor technology is potentially a cost-effective approach to meet operational requirements, and to reduce maintenance costs. Fiber optic sensor technology is being developed to provide existing and future aircrafts with SHM capability due to its unique superior characteristics. This review paper covers the aerospace SHM requirements and an overview of the fiber optic sensor technologies. In particular, fiber Bragg grating (FBG) sensor technology is evaluated as the most promising tool for load monitoring and damage detection, the two critical SHM aspects of air platforms. At last, recommendations on the implementation and integration of FBG sensors into an SHM system are provided.

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Section: Overview Of Fiber Optic Sensor Technologiesmentioning

confidence: 99%

Section: Overview Of Fiber Optic Sensor Technologiesmentioning

confidence: 99%

Fiber Optic Sensors for Structural Health Monitoring of Air Platforms

Guo

Xiao

Mrad

et al. 2011

Sensors

263

115

View full text Add to dashboard Cite

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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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“…OTDR (optical time domain reflectometry) has been used for monitoring the fiber optical communication links and measuring the fiber lengths for many years [1]. The principle of OTDR is to measure the Rayleigh backscattered lights and Fresnel reflections as a function of distance [2].…”

Section: Introduction mentioning

confidence: 99%

“…A theoretical analysis of the OTDR for single mode fibers is presented in Ref. [1]. On the other hand, the OFDR (optical frequency domain reflectometry) technique for detecting very weak reflections in optical fibers is also demonstrated [3].…”

Section: Introduction mentioning

confidence: 99%

Precise Optical Fiber Length Measurement System Based on Fresnel Reflection

Durak¹,

Başgümüş²,

Sadik³

et al. 2016

JEE

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In this study, a precise optical fiber length measurement system is proposed. The measurement technique is based on the measurement of relative Fresnel reflected light intensity in a test fiber. Time delayed optical reflected pulses are obtained from a single nanosecond pulse injected at the input due to the difference in lengths of the reference and test fibers. The lengths of the different optical fibers have been measured with this technique with high resolution and fast response time. The measured results show that, the proposed technique has a comparable performance with the well-known length measurement systems.

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Single-Mode Fiber OTDR: Experiment and Theory

Cited by 33 publications

References 18 publications

Fiber Optic Sensors for Structural Health Monitoring of Air Platforms

Fiber Optic Sensors for Structural Health Monitoring of Air Platforms

Highly accurate fiber transfer delay measurement with large dynamic range

Precise Optical Fiber Length Measurement System Based on Fresnel Reflection

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