Contents
2011
Volume: 1 Issue 1
8 Article(s)
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Review
Recent Progress of In-Fiber Integrated Interferometers
Libo YUAN
A brief review of recent progress made in a range of in-fiber integrated interferometers for measuring is presented, with particular attention paid to the multi-core based in-fiber integrated techniques, which have the potential to be exploited in a variety of wide applications.A brief review of recent progress made in a range of in-fiber integrated interferometers for measuring is presented, with particular attention paid to the multi-core based in-fiber integrated techniques, which have the potential to be exploited in a variety of wide applications..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 1 (2011)
Tilted Fiber Bragg Gratings: Principle and Sensing Applications
Xiaoyi DONG, Hao ZHANG, Bo LIU, and Yinping MIAO
In this paper, the mode coupling mechanism of tilted fiber Bragg gratings (TFBGs) is briefly introduced at first. And a general review on the fabrication, theoretical and experimental research development of TFBGs is presented from a worldwide perspective, followed by an introduction of our current research work on TFBIn this paper, the mode coupling mechanism of tilted fiber Bragg gratings (TFBGs) is briefly introduced at first. And a general review on the fabrication, theoretical and experimental research development of TFBGs is presented from a worldwide perspective, followed by an introduction of our current research work on TFBGs at the Institute of Modern Optics, Nankai University (IMONK), including TFBG sensors for single-parameter measurements, temperature cross sensitivity of TFBG sensors, and TFBG-based interrogation technique. Finally, we would make a summary of the related key techniques and a remark on prospects of the research and applications of TFBGs..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 6 (2011)
Micro/Nanofiber Optical Sensors
Lei ZHANG, Jingyi LOU, and and Limin TONG
As a low-dimensional optical fiber with diameter close to or below the wavelength of light, optical micro/nanofiber (MNF) offers a number of favorable properties for optical sensing, which have been exploited in a variety of sensing applications, including physical, chemical, and biological sensors. In this paper we reAs a low-dimensional optical fiber with diameter close to or below the wavelength of light, optical micro/nanofiber (MNF) offers a number of favorable properties for optical sensing, which have been exploited in a variety of sensing applications, including physical, chemical, and biological sensors. In this paper we review the principles and applications of silica, glass, and polymer optical micro/nanofibers for physical and chemical sensing..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 31 (2011)
Fiber Laser Sensing System and Its Applications
Yuliang LIU, Wentao ZHANG, Tuanwei XU, Jun HE, Faxiang ZHANG, and and Fang LI
An overview of fiber laser sensing is presented. The design and the characteristics of distributed feedback (DFB) fiber lasers for high performance sensing applications are described. Demodulation techniques based on unbalanced fiber interferometer are discussed, especially for the noise level, the dynamic range, and tAn overview of fiber laser sensing is presented. The design and the characteristics of distributed feedback (DFB) fiber lasers for high performance sensing applications are described. Demodulation techniques based on unbalanced fiber interferometer are discussed, especially for the noise level, the dynamic range, and the crosstalk in dense-wavelength-division multiplexing. Finally, the fiber laser sensing system configurations and field demonstrations for different applications are illustrated..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 43 (2011)
Recent Developments in Fiber Optic Spectral White-Light Interferometry
[in Chinese], and [in Chinese]
Recent developments in spectral white-light interferometry (WLI) are reviewed. Firstly, the techniques for obtaining optical spectrum are introduced. Secondly, some novel measurement techniques are reviewed, including the improved peak-to-peak WLI, improved wavelength-tracking WLI, Fourier transform WLI, and 3 × 3Recent developments in spectral white-light interferometry (WLI) are reviewed. Firstly, the techniques for obtaining optical spectrum are introduced. Secondly, some novel measurement techniques are reviewed, including the improved peak-to-peak WLI, improved wavelength-tracking WLI, Fourier transform WLI, and 3 × 3 coupler based WLI. Furthermore, a hybrid measurement for the intensity-type sensors, interferometric sensors, and fiber Bragg grating sensors is achieved. It is shown that these developments have assisted in the progress of WLI..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 62 (2011)
Pressure Sensor Based on the Fiber-Optic Extrinsic Fabry-Perot Interferometer
[in Chinese], and [in Chinese]
Pressure sensors based on fiber-optic extrinsic Fabry-Perot interferometer (EFPI) have been extensively applied in various industrial and biomedical fields. In this paper, some key improvements of EFPI-based pressure sensors such as the controlled thermal bonding technique, diaphragm-based EFPI sensors, and white lightPressure sensors based on fiber-optic extrinsic Fabry-Perot interferometer (EFPI) have been extensively applied in various industrial and biomedical fields. In this paper, some key improvements of EFPI-based pressure sensors such as the controlled thermal bonding technique, diaphragm-based EFPI sensors, and white light interference technology have been reviewed. Recent progress on signal demodulation method and applications of EFPI-based pressure sensors has been introduced. Signal demodulation algorithms based on the cross correlation and mean square error (MSE) estimation have been proposed for retrieving the cavity length of EFPI. Absolute measurement with a resolution of 0.08 nm over large dynamic range has been carried out. For downhole monitoring, an EFPI and a fiber Bragg grating (FBG) cascade multiplexing fiber-optic sensor system has been developed, which can operate in temperature 300 ℃ with a good long-term stability and extremely low temperature cross-sensitivity. Diaphragm-based EFPI pressure sensors have been successfully used for low pressure and acoustic wave detection. Experimental results show that a sensitivity of 31 mV/Pa in the frequency range of 100 Hz to 12.7 kHz for aeroacoustic wave detection has been obtained..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 72 (2011)
Progress of Optical Fiber Sensors and Its Application in Harsh Environment
Min ZHANG, Xiaohong MA, Liwei WANG, Shurong LAI, Hongpu ZHOU, Huafeng ZHAO, and and Yanbiao LIAO
Fiber sensors have been developed for industry application with significant advantages. In this paper, Fiber sensors for oil field service and harsh environment monitoring which have been investigated in Tsinghua University are demonstrated. By discussing the requirements of practical applications, the key technologiesFiber sensors have been developed for industry application with significant advantages. In this paper, Fiber sensors for oil field service and harsh environment monitoring which have been investigated in Tsinghua University are demonstrated. By discussing the requirements of practical applications, the key technologies of long-period fiber grating (LPFG) based fiber sensor, optical spectrum analyzer for oil detection, laser induced breakdown spectroscopy (LIBS) system for soil contamination monitoring, and seismic sensor arrays are described..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 84 (2011)
Recent Progress of Fiber Sensing Technologies in Tianjin University
Tiegen LIU, Kun LIU, Junfeng JIANG, Enbang LI, Hongxia ZHANG, Dagong JIA, and and Yimo ZHANG
The up to date progress of fiber sensing technologies in Tianjin University are proposed in this paper. Fiber-optic temperature sensor based on the interference of selective higher-order modes in circular optical fiber is developed. Parallel demodulation for extrinsic Fabry-Perot interferometer (EFPI) and fiber Bragg gThe up to date progress of fiber sensing technologies in Tianjin University are proposed in this paper. Fiber-optic temperature sensor based on the interference of selective higher-order modes in circular optical fiber is developed. Parallel demodulation for extrinsic Fabry-Perot interferometer (EFPI) and fiber Bragg grating (FBG) sensors is realized based on white light interference. Gas concentration detection is realized based on intra-cavity fiber laser spectroscopy. Polarization maintaining fiber (PMF) is used for distributed position or displacement sensing. Based on the before work and results, we gained National Basic Research Program of China on optical fiber sensing technology and will develop further investigation in this area..
Photonic Sensors
- Publication Date: Jan. 01, 1900
- Vol. 1, Issue 1, 90 (2011)
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