本期继续补一下去年4季度的文献。

美国匹兹堡大学的C. M. Jewart等人报道了suspended-core光纤光栅的弯曲不敏感特性（C. M. Jewart, et al., "Bending insensitivity of fiber Bragg gratings in suspended-core optical fibers," OPTICS LETTERS, vol. 36, pp. 4491-4493, Dec 2011.）。由于与纤芯连接的桥状结构，减少了弯曲应力向纤芯的传递，在弯曲半径6.35 mm时，损耗仅有0.14 dB。

图1  suspended-core光纤结构

墨西哥的D. Monzon-Hernandez等人报道了采用两个光纤拉锥进行弯曲传感的试验（D. Monzon-Hernandez, et al., "Compact optical fiber curvature sensor based on concatenating two tapers," OPTICS LETTERS, vol. 36, pp. 4380-4382, Nov 2011.）。两个拉锥之间在弯曲时，包层模发生干涉，形成光纤内的MZ干涉仪。下图2为拉锥之间间距不同时干涉仪的输出。

图2  拉锥间距5 mm（上）和40 mm时干涉仪的输出

国防科大的张学亮等人报道了采用单个FBG的Michelson干涉仪传感方案（X. Zhang, et al., "Sensing system with Michelson-type fiber optical interferometer based on single FBG reflector," Chin. Opt. Lett., vol. 9, p. 110601, 2011.），该方案如图3所示，其优势在于简化了传感头的复杂度，但是，如作者所说，如何保证环形激光器和FBG的温度漂移问题十分关键。

图3  单个FBG的Michelson干涉仪传感

四川流体物理研究所的X. Y. Deng等人报道了采用FBG测量冲击应力的结果（X. Y. Deng, et al., "Research on the fiber Bragg grating sensor for the shock stress measurement," REVIEW OF SCIENTIFIC INSTRUMENTS, vol. 82, Oct 2011.）。

德国GE研究机构的研究人员报道了FBG流量传感器的测试结果（R. Pannekeet, et al., "Experimental Test Results for a Fiber Bragg Grating-based Flow Sensor," Journal of Intelligent Material Systems and Structures, vol. 22, pp. 1411-1417, Sep 2011.），图4。

图4  FBG流量传感器

吉林大学的Chao Chen等人报道了用FBG监测飞秒激光与玻璃相互作用是的温度效应，文章报道了不同重复频率和不同照射光强下玻璃的温度变化（C. Chen, et al., "Monitoring Thermal Effect in Femtosecond Laser Interaction With Glass by Fiber Bragg Grating," JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 29, pp. 2126-2130, Jul 2011.），图5。

图5  Chao Chen等人报道的研究框图

澳大利亚新南威尔士大学的M. Li等人报道了基于环形腔激光器的气体吸收传感器（M. Li, et al., "Performance Analysis and Design Optimization of an Intracavity Absorption Gas Sensor Based on Fiber Ring Laser," Lightwave Technology, Journal of, vol. 29, pp. 3748-3756, 2011.）。

浙江师范大学的D. R. Chen等人报道了采用双芯PCF的光纤液压传感器（D. R. Chen, et al., "Dual-Core Photonic Crystal Fiber for Hydrostatic Pressure Sensing," IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 23, pp. 1851-1853, Dec 2011.），图6。

图6  双芯PCF光纤液压传感器

马来西亚的S. W. Harun等人报道了采用凹面镜的光纤位移传感器（S. W. Harun, et al., "Theoretical and experimental studies on coupler based fiber optic displacement sensor with concave mirror," Optik - International Journal for Light and Electron Optics.）。

南京大学的Y. Chen等人报道了Teflon涂覆的微光纤谐振腔的温度特性（Y. Chen, et al., "Teflon-coated microfiber resonator with weak temperature dependence," OPTICS EXPRESS, vol. 19, pp. 22923-22928, Nov 2011.）。

南京大学的L. Gao等人报道了利用多纵模激光器排频的光纤振动传感器（L. Gao, et al., "Multi-longitudinal mode fiber-optic vibration sensor," in Microwave Photonics, 2011 International Topical Meeting on & Microwave Photonics Conference, 2011 Asia-Pacific, MWP/APMP, 2011, pp. 133-136.），图7。

图7  利用纵模排频的振动传感器

澳大利亚新南威尔士大学的A. I. Azmi等人报道了采用相移光栅的振动传感系统（A. I. Azmi, et al., "Performance Enhancement of Vibration Sensing Employing Multiple Phase-Shifted Fiber Bragg Grating," JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 29, pp. 3453-3460, Nov 2011.），图8。

图8  采用相移光栅的振动传感器

南开大学的B. Liu等报道了利用DBR光纤激光器的偏振模排频进行温度和横向应力同时测量的结果（B. Liu and H. Zhang, "Polarimetric distributed Bragg reflector fiber laser sensor array for simultaneous measurement of transverse load and temperature," Optical Fiber Technology, vol. 17, pp. 619-625, Dec 2011.），图9。

图9  利用DBR光纤激光器的偏振模排频进行温度和横向应力同时测量

日本的K. Wada等人报道了采用保偏光纤的平衡Sagnac干涉仪振动传感器（K. Wada, et al., "Balanced polarization maintaining fiber Sagnac interferometer vibration sensor," Opt. Express, vol. 19, pp. 21467-21474, 2011.），图10。

图10  基于Sagnac干涉仪的振动传感器

爱尔兰的K. Bremer等人报道了内置FBG的FP传感器用于温度和压力的测量（K. Bremer, et al., Temperature compensated miniature all-glass fibre optic pressure sensor. New York: Ieee, 2011.），图11。

图11  EFPI/FBG复合传感器

美国Lehigh大学的Q. S. Cui等人报道了基于BOTDA的分布式振动传感器（Q. S. Cui, et al., "Truly Distributed Fiber Vibration Sensor Using Pulse Base BOTDA With Wide Dynamic Range," IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 23, pp. 1887-1889, Dec 2011.）。

加拿大的M. A. Farahani等人提出了采用互相关算法在BOTDA中估计布里渊频移的方法（M. A. Farahani, et al., "Accurate estimation of Brillouin frequency shift in Brillouin optical time domain analysis sensors using cross correlation," OPTICS LETTERS, vol. 36, pp. 4275-4277, Nov 2011.）。报道称采用互相关算法可以减小噪声的影响并与初始拟合参数的设置无关。

哈尔滨工程大学的X. H. Yang等人报道了采用亚微米有机硅胶光纤进行氧传感器研究的结果（X. H. Yang, et al., "Submicrometer organic silica gel fiber for oxygen sensing," OPTICS LETTERS, vol. 36, pp. 4656-4658, Dec 2011.）。

中国台湾的J. T. Lee等人报道了在三轴测试系统中光纤传感器的应用（J. T. Lee, et al., "A Fiber Optic Sensored Triaxial Testing Device," Geotechnical Testing Journal, vol. 34, pp. 103-111, Mar 2011）。在该测试系统中，使用了光纤光栅力/压力/位移传感器代替了传统的电学传感器，如图12。

图12  光纤传感器在三轴测试系统中的应用

印度的P. Banerji等人报道了光纤应变传感器在预应力箱型梁大桥监测中的应用（P. Banerji, et al., Application of Fiber-Optic Strain Sensors for Monitoring of a Pre-Stressed Concrete Box Girder Bridge. New York: Ieee, 2011.），图13为箱型梁内传感器的布设。

图13  箱型梁内传感器的布设

渥太华大学的Y. K. Dong等人报道了BOTDA在大型发电机监测中的应用（Y. K. Dong, et al., "Online monitoring of the distributed lateral displacement in large AC power generators using a high spatial resolution Brillouin optical fiber sensor," Smart Materials & Structures, vol. 20, Nov 2011.）。

其它部分在这段时间内发表的光纤传感文献：

R. Bernini, et al., "Long-range distributed Brillouin fiber sensors by use of an unbalanced double sideband probe," OPTICS EXPRESS, vol. 19, pp. 23845-23856, Nov 2011.

Y. Q. Yuan and L. Y. Ding, "Theoretical investigation for excitation light and fluorescence signal of fiber optical sensor using tapered fiber tip," OPTICS EXPRESS, vol. 19, pp. 21515-21523, Oct 2011.

S. Girard, et al., "Transient radiation-induced effects on solid core microstructured optical fibers," OPTICS EXPRESS, vol. 19, pp. 21760-21767, Oct 2011.

A. Voskoboinik, et al., "Sweep-free distributed Brillouin time-domain analyzer (SF-BOTDA)," OPTICS EXPRESS, vol. 19, pp. 842-847, Dec 2011.

R. Bernini, et al., "Long-range distributed Brillouin fiber sensors by use of an unbalanced double sideband probe," OPTICS EXPRESS, vol. 19, pp. 23845-23856, 2011.

D. Liu, et al., "A Fiber Bragg Grating Sensor Network Using an Improved Differential Evolution Algorithm," IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 23, pp. 1385-1387, Oct 2011.

M. R. A. Hassan, et al., "Dual-phase sensing for early detection of prepreg structural failures via etched cladding Bragg grating," Sensors and Actuators a-Physical, vol. 171, pp. 126-130, Nov 2011.

J. Ge, et al., "A novel fiber-optic ice sensor capable of identifying ice type accurately," Sensors and Actuators A: Physical.

此外，在2011年光学仪器与技术会议（SPIE vol. 8201）中有很多与光纤传感相关的文献，详见http://spie.org/x648.html?product_id=900019&origin_id=x4323&start_year=2011&end_year=2011.