Simultaneous Temperature and Strain Measurement Using Two Types of High-Birefringence Fibers in Sagnac Loop Mirror

Sun, Greg; Moon, Dae Seung; Chung, Youngjoo

doi:10.1109/lpt.2007.908775

Cited by 85 publications

(38 citation statements)

References 7 publications

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“…And the theoretical sensitivities are ~6.1 nm/°C and ~6.5 nm/°C from Eq. (14). It is clear that the theoretical and the experimental results are in accordance.…”

Section: Photonics Crystal Fiber Loop Mirrors and Their Applications 207supporting

confidence: 58%

“…It can be provided the measurement range of ~84 °C with the same temperature sensitivity ~6.6 nm /°C according to Eq. (14), in which the length of the sensing fiber is the same as the length of FBG sensing head and is shortened 72 times than that of the conventional HiBi-FLM temperature sensor.…”

Section: Photonics Crystal Fiber Loop Mirrors and Their Applications 207mentioning

confidence: 99%

“…However, when a HiBi-FLM is used to measure strain or other parameters, its cross-sensitivity to temperature may degrade sensor performance since the optical path length of the HiBi-FLM shows temperature dependence caused by thermal refractive-index change and thermal expansion effect. Thus, the temperature effect must be discriminated or eliminated when they are used for sensing [13][14][15]. The photonic crystal fiber (PCF) is a new class of optical fiber that emerged in recent years.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photonics Crystal Fiber Loop Mirrors and Their Applications'

Chen¹,

Dong²,

Fu³

et al. 2012

Recent Progress in Optical Fiber Research

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“…And the theoretical sensitivities are ~6.1 nm/°C and ~6.5 nm/°C from Eq. (14). It is clear that the theoretical and the experimental results are in accordance.…”

Section: Photonics Crystal Fiber Loop Mirrors and Their Applications 207supporting

confidence: 58%

Section: Photonics Crystal Fiber Loop Mirrors and Their Applications 207mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photonics Crystal Fiber Loop Mirrors and Their Applications'

Chen¹,

Dong²,

Fu³

et al. 2012

Recent Progress in Optical Fiber Research

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“…Path length differences produce interference fringes that have strong strain and temperature dependence. Sagnac fiber loops can be assembled using a highly birefringent fiber (Sun et al 2007) as shown in Figure 5.7. Linearly polarized light counter-propagates through the loop, which is exposed to temperature changes.…”

Section: Fundamentals Of Operationmentioning

confidence: 99%

Technical Readiness and Gaps Analysis of Commercial Optical Materials and Measurement Systems for Advanced Small Modular Reactors

Anheier¹,

Suter²,

Qiao³

et al. 2013

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Energy Research and Development Roadmap and industry stakeholders by evaluating optically based instrumentation and control (I&C) concepts for advanced small modular reactor (AdvSMR) applications. These advanced designs will require innovative thinking in terms of engineering approaches, materials integration, and I&C concepts to realize their eventual viability and deployment. The primary goals of this report include:1. Establish preliminary I&C needs, performance requirements, and possible gaps for AdvSMR designs based on best-available published design data.2. Document commercial off-the-shelf (COTS) optical sensors, components, and materials in terms of their technical readiness to support essential AdvSMR in-vessel I&C systems.3. Identify technology gaps by comparing the in-vessel monitoring requirements and environmental constraints to COTS optical sensor and materials performance specifications.4. Outline a future research, development, and demonstration (RD&D) program plan that addresses these gaps and develops optical-based I&C systems that enhance the viability of future AdvSMR designs.The DOE-NE roadmap outlines RD&D activities intended to overcome technical barriers that currently limit advances in nuclear energy. As part of this strategy, DOE-NE is sponsoring research on advanced reactor supportive technologies to reduce the identified barriers. Key challenges that must be overcome include the high capital costs to develop nuclear power plants, maintaining safety performance as the reactor fleet expands, minimizing nuclear waste, and maintaining strong proliferation resistance. AdvSMR designs are a major component of this strategy, because these designs offer a number of unique advantages. The modular and small size of AdvSMR designs naturally lead to reduced capital investments and, potentially, construction savings through factory fabrication. However, new economic and technical challenges accompany the many attractive features offered by AdvSMR designs. Specifically, the modest power output of AdvSMRs does not provide the economy of scale afforded by large reactors. In addition, many of the AdvSMR designs operate at much higher temperatures than lightwater reactors and require instrumentation to withstand harsh, in-vessel environments arising from unconventional, chemically aggressive coolants and unique reactor system configurations.Addressing these I&C challenges will be critically important to the AdvSMR development program to ensure the viability and future success of advanced reactor designs. Solutions will likely be found through evolution of conventional reactor technology, and the development of entirely new concepts. Early pressure/boiling water reactors used conventional I&C technologies (e.g., thermocouples, ionchambers, strain-gauge pressure sensors) to satisfy design requirements. Because these technologies worked well in the relatively low-temperature reactor designs, the demand for alternate I&C technologies was limited. At the time, optical-based reactor monitoring concepts were g...

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“…The only way of varying the filter interval is to use different Hi-Bi fiber length in the FLM; it is not practical in real optical systems. To avoid the disadvantage, many techniques have been proposed theoretically and experimentally such as the use of multi sections of Hi-Bi fibers [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Fiber Loop Mirror Filter With Two-Stage High Birefringence Fibers

Lim¹,

Pua²,

Awang³

et al. 2009

PIER C

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Abstract-A fiber loop mirror (FLM) with two-stage high birefringence (Hi-Bi) fibers is theoretically and experimentally studied for various rotation angles and Hi-Bi fiber lengths. The experimental spectra are observed to be in good agreement with the theoretical spectra, verifying our theoretical model. The wavelength interval of the comb filter depends on the Hi-Bi fiber lengths and rotation angles. By varying the rotation angle from 0 • to 90 • , a comb-like transmission spectrum with small wavelength spacing is evolving into an exotic but periodic transmission spectrum and eventually become a larger wavelength spacing transmission spectrum. The FLM is useful in many applications such wavelength division multiplexing power equalization and management, switchable multi-wavelength fiber laser, optical switch and etc.

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Simultaneous Temperature and Strain Measurement Using Two Types of High-Birefringence Fibers in Sagnac Loop Mirror

Cited by 85 publications

References 7 publications

Photonics Crystal Fiber Loop Mirrors and Their Applications'

Photonics Crystal Fiber Loop Mirrors and Their Applications'

Technical Readiness and Gaps Analysis of Commercial Optical Materials and Measurement Systems for Advanced Small Modular Reactors

Fiber Loop Mirror Filter With Two-Stage High Birefringence Fibers

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