Temperature independent polarization-maintaining photonic crystal fiber with regular pentagon air hole distribution

Yang, Huajun; Huang, Weiliang; Jiao, Shangbin; Sun, X.; Hong, Wei; Li, Qiao

doi:10.1016/j.ijleo.2019.03.120

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…These scholars used a λ/4 waveplate with a negative temperature coefficient to compensate for the positive changes in the Fielder constant, resulting in an output error of less than 0.2% in the range of -40 to 85°C [90]. In the linear birefringence suppression method, new special fibers, such as twisted, highly refractive fibers and polygonal polarization-preserving photonic crystal fibers [91], can effectively suppress the linear birefringence effect caused by nonidealized bending and external squeezing. However, the high cost of special optical fibers limits the widespread use of this approach.…”

Section: ) All-fibermentioning

confidence: 99%

High-Current Sensing Technology for Transparent Power Grids: A Review

Sun,

Huang,

Peng

2024

IEEE Open J. Ind. Electron. Soc.

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The global energy industry is moving towards a trend of green and low-carbon transformation. A transparent power grid represents a new development form under this energy transition trend, integrating the power grid with new generation information and communication technologies, exemplified by the internet. The use of micro smart sensors allows real-time monitoring of many important parameters of power systems via current, which is crucial for ensuring safe, stable, intelligent, and green power grid operation. Here, based on the development logic of current sensing technology for traditional-smarttransparent power grids, we focus our research on high-current sensing in a transparent power grid. First, we review the widely used traditional current sensing methods of shunts and Rogowski coils. More advanced optical fiber current sensing methods and microelectromechanical system current sensing chips are then introduced, which are more suitable for the smart sensing requirements of transparent power grids. In addition, we present and discuss the technical characteristics, research status, application scope, advantages and disadvantages, and future development directions of the above methods in detail. Finally, we address many essential challenges including miniaturization, integration, low power consumption, passive wireless sensing, long-range operation, and complex environmental parameters in the comprehensive intelligent and transparent sensing of current parameters in power grids. To address these challenges, we present three possible development directions: sensor improvement, development of communication and networking technologies for sensors, and advancement of intelligent and fast processing methods through communication.

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Section: ) All-fibermentioning

confidence: 99%

High-Current Sensing Technology for Transparent Power Grids: A Review

Sun,

Huang,

Peng

2024

IEEE Open J. Ind. Electron. Soc.

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“…1,2 As a promising solution in modern society, the optical fiber has been applied not only to communication systems but also to a variety of sensors or high optical power deliveries as in laser systems. [3][4][5][6] Accordingly, one of the major trends in optical fiber science is to be able to accommodate and obtain appropriate fibers with polarization maintaining (PM), which enables to preserve the polarization state of the source input light beam to match with the state of the output beam under stable condition, as in fiber optic gyroscope, interferometric fiber sensing, and optical long-distance coherent communication systems. 5,6 Also, chromatic dispersion characteristics for those optical fiber applications are imperatively necessary to be optimized and managed to incorporate a near-zero dispersion at the operating wavelength in terms of avoiding the catastrophic build-up of spurious waves, because these are considered as major sources of signal degradation.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6] Accordingly, one of the major trends in optical fiber science is to be able to accommodate and obtain appropriate fibers with polarization maintaining (PM), which enables to preserve the polarization state of the source input light beam to match with the state of the output beam under stable condition, as in fiber optic gyroscope, interferometric fiber sensing, and optical long-distance coherent communication systems. 5,6 Also, chromatic dispersion characteristics for those optical fiber applications are imperatively necessary to be optimized and managed to incorporate a near-zero dispersion at the operating wavelength in terms of avoiding the catastrophic build-up of spurious waves, because these are considered as major sources of signal degradation. 2 During recent past decades, to achieve those goals, photonic crystal fibers (PCFs) have been extensively investigated 3,7 because of unique transmission properties that cannot be easily achieved from conventional step and graded index fibers.…”

Section: Introductionmentioning

confidence: 99%

“…Optical communications especially have contributed human kind to interact with each other more safely and conveniently 1,2 . As a promising solution in modern society, the optical fiber has been applied not only to communication systems but also to a variety of sensors or high optical power deliveries as in laser systems 3–6 . Accordingly, one of the major trends in optical fiber science is to be able to accommodate and obtain appropriate fibers with polarization maintaining (PM), which enables to preserve the polarization state of the source input light beam to match with the state of the output beam under stable condition, as in fiber optic gyroscope, interferometric fiber sensing, and optical long‐distance coherent communication systems 5,6 .…”

Section: Introductionmentioning

confidence: 99%

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High birefringence and near‐zero dispersion control of nonlinear photonic crystal fibers with a double‐cladded coaxial core

Kim

2023

Micro & Optical Tech Letters

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Optical propagation characteristics of high birefringence (HB), near-zero chromatic dispersion, and small effective mode area are first investigated along with simultaneously effective controllability for the new double-cladded coaxial core photonic crystal fibers with the breakthrough air-hole defects at the middle-top, middle-bottom, right-top, and left-bottom, as pairs, which enable the adaptation of novel systematic approach for design goals in the inner first hexagonal cladding layer. Compared with results (around 3.2 × 10 −4 ) of well-known HB optical fibers, superior performance for preserving the lightwave polarization state by about three times higher HB levels has been achieved with additive advantages of fabrication from only pure fused silica material and broadly unlimited stable single-mode operation.

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“…Yang et al [13] used a temperature stabilization chamber to control the working temperature of a SINS. Some researchers have tried to find temperature-insensitive materials for inertial sensors [14].…”

Section: Introductionmentioning

confidence: 99%

A system-level calibration method including temperature-related error coefficients for a strapdown inertial navigation system

Zichao

Xie

et al. 2021

Meas. Sci. Technol.

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The calibration of error coefficients for accelerometers and laser gyros is an effective way to improve the navigation precision of strapdown inertial navigation systems. The calibration parameters often change with temperature. This paper proposes a system-level calibration method including temperature-related error coefficients. The method includes an improved 18-step calibration scheme with temperature being changed by using a thermal chamber. A 42-dimensional Kalman filter is applied to estimate the error parameters including the bias, scale factor errors, installation errors and temperature-related error coefficients of accelerometers. This method has the great advantage of simplifying the calibration procedure and is widely applicable to all temperature-related error coefficients. Compared with the traditional calibration method at different temperature points, the calibration time of the proposed method is shortened by 24 h. The feasibility of this method is verified by simulations and navigation experiments. The results of navigation experiments show that the maximum positioning errors in pure inertial navigation decrease by approximately 30% after temperature compensation.

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Temperature independent polarization-maintaining photonic crystal fiber with regular pentagon air hole distribution

Cited by 10 publications

References 13 publications

High-Current Sensing Technology for Transparent Power Grids: A Review

High-Current Sensing Technology for Transparent Power Grids: A Review

High birefringence and near‐zero dispersion control of nonlinear photonic crystal fibers with a double‐cladded coaxial core

A system-level calibration method including temperature-related error coefficients for a strapdown inertial navigation system

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