The Experts below are selected from a list of 84303 Experts worldwide ranked by ideXlab platform
Anbo Wang - One of the best experts on this subject based on the ideXlab platform.
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a large serial time division multiplexed fiber bragg grating sensor network
2012Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Tyler Shillig, Anbo WangAbstract:We demonstrated a wavelength scanning time division Multiplexing of 1000 ultra-weak fiber Bragg gratings (FBG) for distributed temperature sensing. The strong Multiplexing capability and low crosstalk of the ultra-weak FBG sensors is investigated through both theoretical analysis and experiment. An automated FBG fabrication system was developed for fast 1000-FBG fabrication. The measurement accuracy of Bragg wavelengths for more than 80% FBGs is less than 20 pm, corresponding to 2 $^{\circ}$ C in temperature.
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a quasi distributed sensing network with time division multiplexed fiber bragg gratings
2011Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Weihong Bi, Anbo WangAbstract:We propose a serial Time-Division-Multiplexing sensor network based on ultraweak fiber Bragg gratings (FBGs). Twelve ultraweak FBGs are distinguished with a spatial resolution of about 0.2 m, and their spectra are resolved with an accuracy of about 10 pm. The low crosstalk of the gratings makes it possible to multiplex over 1000 gratings along a single optical fiber.
Yunmiao Wang - One of the best experts on this subject based on the ideXlab platform.
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a large serial time division multiplexed fiber bragg grating sensor network
2012Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Tyler Shillig, Anbo WangAbstract:We demonstrated a wavelength scanning time division Multiplexing of 1000 ultra-weak fiber Bragg gratings (FBG) for distributed temperature sensing. The strong Multiplexing capability and low crosstalk of the ultra-weak FBG sensors is investigated through both theoretical analysis and experiment. An automated FBG fabrication system was developed for fast 1000-FBG fabrication. The measurement accuracy of Bragg wavelengths for more than 80% FBGs is less than 20 pm, corresponding to 2 $^{\circ}$ C in temperature.
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a quasi distributed sensing network with time division multiplexed fiber bragg gratings
2011Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Weihong Bi, Anbo WangAbstract:We propose a serial Time-Division-Multiplexing sensor network based on ultraweak fiber Bragg gratings (FBGs). Twelve ultraweak FBGs are distinguished with a spatial resolution of about 0.2 m, and their spectra are resolved with an accuracy of about 10 pm. The low crosstalk of the gratings makes it possible to multiplex over 1000 gratings along a single optical fiber.
Anand Asundi - One of the best experts on this subject based on the ideXlab platform.
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integrated real time monitoring system for strain temperature distribution based on simultaneous wavelength and time division Multiplexing technique
2014Co-Authors: Yongbo Dai, Anand Asundi, Yanju Liu, Jinsong LengAbstract:Abstract Based on the combination of wavelength- and Time-Division Multiplexing technique, a novel fiber Bragg grating (FBG) sensor Multiplexing system is proposed, which can be used for monitoring the two-dimensional strain and temperature field distribution in large structures. The FBG sensing unit is encoded simultaneously in both wavelength and time domains. Using the semiconductor optical amplifier (SOA) resonant cavity technology, a large capacity Multiplexing technology with mixed Time-Division and wave-division Multiplexing (TDM+WDM) is presented. The sensor array contains many groups with each group composed of many sensors. The group is addressed by TDM mode and each sensor of the groups is accessed by WDM mode. Therefore, the total Multiplexing capacity is multiplication of TDM and WDM. In theory, more than 1000 sensors can be multiplexed on one single fiber. The feasibility of the scheme was experimentally demonstrated through a sensor system with a two dimensional FBG sensing network with 5×5 sensors arrays. In addition, the strain/temperature distribution in an aluminum plate was measured at real time under different loading/heating by using above FBG sensing network.
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A novel Time-Division Multiplexing fiber Bragg grating sensor interrogator for structural health monitoring
2009Co-Authors: Yongbo Dai, Jinsong Leng, Gang Deng, Yanju Liu, Anand AsundiAbstract:A novel fiber Bragg grating (FBG) sensor system for measurement of strain and temperature is proposed in this paper. The proposed sensor technique is based on Time-Division Multiplexing (TDM). A semiconductor optical amplifier (SOA), connected in a ring cavity, is used to serve as a gain medium and switch. The SOA is driven by a pulse generator, which operates the SOA at different periods of time to select reflected pulses from a particular sensor. The FBG sensors have identical center wavelengths and can be deployed along the same fiber. This technique relieves the spectral bandwidth issue and permits the interrogation of up to 100 FBGs along a fiber, if the reflectivity of the individual sensors is sufficiently low to avoid shadowing effects. This system is particularly suitable for the application in structural health monitoring (SHM) where large numbers of sensors are required in wide measurement ranges. Crown Copyright © 2009.
Jianmin Gong - One of the best experts on this subject based on the ideXlab platform.
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a large serial time division multiplexed fiber bragg grating sensor network
2012Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Tyler Shillig, Anbo WangAbstract:We demonstrated a wavelength scanning time division Multiplexing of 1000 ultra-weak fiber Bragg gratings (FBG) for distributed temperature sensing. The strong Multiplexing capability and low crosstalk of the ultra-weak FBG sensors is investigated through both theoretical analysis and experiment. An automated FBG fabrication system was developed for fast 1000-FBG fabrication. The measurement accuracy of Bragg wavelengths for more than 80% FBGs is less than 20 pm, corresponding to 2 $^{\circ}$ C in temperature.
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a quasi distributed sensing network with time division multiplexed fiber bragg gratings
2011Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Weihong Bi, Anbo WangAbstract:We propose a serial Time-Division-Multiplexing sensor network based on ultraweak fiber Bragg gratings (FBGs). Twelve ultraweak FBGs are distinguished with a spatial resolution of about 0.2 m, and their spectra are resolved with an accuracy of about 10 pm. The low crosstalk of the gratings makes it possible to multiplex over 1000 gratings along a single optical fiber.
Dorothy Y Wang - One of the best experts on this subject based on the ideXlab platform.
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a large serial time division multiplexed fiber bragg grating sensor network
2012Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Tyler Shillig, Anbo WangAbstract:We demonstrated a wavelength scanning time division Multiplexing of 1000 ultra-weak fiber Bragg gratings (FBG) for distributed temperature sensing. The strong Multiplexing capability and low crosstalk of the ultra-weak FBG sensors is investigated through both theoretical analysis and experiment. An automated FBG fabrication system was developed for fast 1000-FBG fabrication. The measurement accuracy of Bragg wavelengths for more than 80% FBGs is less than 20 pm, corresponding to 2 $^{\circ}$ C in temperature.
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a quasi distributed sensing network with time division multiplexed fiber bragg gratings
2011Co-Authors: Yunmiao Wang, Jianmin Gong, Dorothy Y Wang, Bo Dong, Weihong Bi, Anbo WangAbstract:We propose a serial Time-Division-Multiplexing sensor network based on ultraweak fiber Bragg gratings (FBGs). Twelve ultraweak FBGs are distinguished with a spatial resolution of about 0.2 m, and their spectra are resolved with an accuracy of about 10 pm. The low crosstalk of the gratings makes it possible to multiplex over 1000 gratings along a single optical fiber.
