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【期刊论文】Fiber-Laser-Based Wavelength-Division Multiplexed Fiber Bragg Grating Sensor System
余有龙, Youlong Yu, Luenfu Lui, Hwayaw Tam, and Wenghong Chung
IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 13, NO.7, JULY 2001,-0001,():
-1年11月30日
Abstract-A wavelength-division-multiplexing technique for interrogating 10-cascaded fiber Bragg grating sensing elements based on a ring-compounded-cavity fiber laser is reported. A feedback control technique was introduced to a tunable Fabr-Perot filter that tracks the wavelength-shift of the sensor. The sensors were demodulated using an unbalanced scanning Michelson interferometer and a sensitivity of 1.682/has been demonstrated.
Index Terms-Demodulation and fiber Bragg grating sensor system, fiber Bragg grating, interrogation, ring-cavity laser, wavelength-division multiplexed.,
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【期刊论文】Passive Temperature Compensation Technique for Fiber Bragg Grating Displacement Sensor
余有龙, Youlong Yu, Hwayaw Tam, Zhiguo Liu, and Wenghong Chung
,-0001,():
-1年11月30日
A novel fiber Bragg grating displacement sensor is introduced. Using a uniform density and thickness overlapped dual-isosceles triangular cantilever beam as strain agent, this sensor is demonstrated experimentally and theoretically to be able to compensate the wavelength-shift induced by temperature automatically. The measured sensitivity of this sensor is 0.1051nm/mm within the working range of-18, 18mm.
fiber optics, Bragg gratings, displacement measurement, sensors, compensation.,
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179下载
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【期刊论文】Fiber Bragg Grating Sensor for Simultaneous Measurement of Displacement and Temperature
余有龙, Youlong Yu, Hwayaw Tam, Wenghong Chung, and Muhtesem Suleyman Demokan
,-0001,():
-1年11月30日
A new approach for measuring displacement and temperature simultaneously using a specially designed isosceles triangular cantilever beam as a strain agent is demonstrated. A fiber Bragg grating epoxied on the beam surface is experimentally demonstrated to have a temperature sensitivity of about 0.113 nm/℃ below 60℃.
optical fiber sensors, displacement measurement, temperature measurement,, fiber Bragg grating, sensitivity
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149下载
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【期刊论文】Optical XOR and NXOR logic operations with erasable self-pumped phase conjugation
余有龙, Youlong Yu, Zuohong Jiang, Jie Ying and Xiaoyi Dong
,-0001,():
-1年11月30日
The phenomenon of erasable self-pumped phase conjugation (SPPC) is explained theoretically. Encoded by intensity, all-optical XOR and NXOR logic functions are performed experimentally by controlling the incident and the erasure beams of SPPC. The time response curves of both operations are shown.
self-pumped phase conjugation, optical logic operation
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【期刊论文】A Novel Demodulation Scheme for Fiber Bragg Grating Sensor System
余有龙, Youlong Yu and Hongxia Zhao
IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 17, NO.1, JANUARY 2005,-0001,():
-1年11月30日
Abstract-A novel fiber Bragg grating (FBG) wavelength demodulation scheme based on a compound interference configuration is introduced. This scheme measures the strain-induced wavelength-shift of the FBG in terms of phase-shift signal. The sensing resolution and sensitivity were demonstrated to be 6.2 n and 1.59, respectively, which match the theoretical value of 1.61 very well.
Index Terms-Compound interference, fiber Bragg grating (, FBG), , fiber optics sensor, interferometric demodulation.,
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