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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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    In-fiber Long-period Grating and Fiber Bragg Grating-based Sensor for Simultaneously Monitoring Remote Temperature and Stress
    (2018-01-01)
    Chang, Hung-Ying
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    Yeh, Chien-Hung
    ;
    Huang, Chuan-Ying
    ;
    Fu, Ming-Yue
    ;
    Chow, Chi-Wai
    In this study, we experimentally demonstrated that a high-sensitivity fiber sensor can be used for the remote sensing of temperature and stress simultaneously. The proposed sensor includes several sensing heads, each of which is composed of a long-period grating (LPG) and a fiber Bragg grating (FBG). Moreover, the optical characteristics of both the FBG and LPG are different. On the basis of these different optical features and the sensing transfer matrix, temperature and stress can both be remotely measured simultaneously. The temperature sensitivities of the grating-wavelength shift and grating-reflection intensity are about 0.0082 nm/degrees C and 0.044 dBm/degrees C, respectively. The strain sensitivities of the grating wavelength shift and grating-reflection intensity are respectively around 0.0133 nm/g and 0.0089 dBm/g. Therefore, the fiber sensor can provide a simple method with excellent sensitivity for applications of structure-security monitoring and industrial engineering measurements.
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    L band Tunable Fiber Laser Based on Mirror Reflector and Tunable Fiber Gratings
    (2009)
    Liaw, S. -K.
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    Seung, O.
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    Lai, C. -L.
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    Yu, Y. -L.
    ;
    Hsu, K. -C.
    An L band tunable fiber laser based on tunable FBGs and a broadband fiber mirror is demonstrated. A lasing output power at 1582.0 nm has side-mode-suppression-ratio and pumping efficiency of 55 dB and 12.2%, respectively
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    A Fiber Optic Sensored Triaxial Testing Device
    (2011-03-01)
    Lee, Jui-Ting
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    Tien, Kai-Cheng
    ;
    Ho, Yen Te
    ;
    Huang, An-Bin
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    土木工程學系
    The physical quantities involved in a triaxial testing device have mostly been monitored with electric sensors. These sensors are currently subject to short circuit when submerged under water and electromagnetic interference (EMI). Waterproofing and EMI noise filtration have often been a challenge to the triaxial test set-up. These drawbacks can be substantially minimized when using optic fiber sensors. The optic fiber Bragg grating (FBG) sensors have the additional advantage of being partially distributive where multiple sensors can share the same signal transmission line. Taking advantage of these unique capabilities, the authors explored the possibility of converting all pressure/force and linear displacement transducers in a triaxial testing device into FBG based sensors. A series of shearing tests on unsaturated and saturated soil specimens were carried out using the new FBG sensored triaxial testing device. In most cases, the measurement of physical quantities was paired with electric sensors so that the results can be compared. This paper describes the principles of the individual FBG sensor designs and demonstrates their applications in triaxial testing.