荧光寿命的检测是荧光光学传感器的核心内容,国际上尝试了多种方法来拟合这种理论上为单指数衰减信号的荧光衰减曲线.这些方法包括非线性函数标准拟合方法,即Levenburg-Marquardt方法,以及Prony方法、FFT方法,对数拟合法等等.为了克服在实际应用中发生的信号退化,需要在测量信号衰减寿命的同时测量信号的初始强度.文章介绍了一种加权的对数拟合法,经计算机仿真及实际数据测试均可以得到和Levenburg-Marquardt方法非常接近的结果,且拟合时间大大缩短,测量稳定性大大提高.仿真测试及具体实验测试结果显示了这种方法的有效性.该方法不仅与Levenburg-Marquardt方法的偏差曲线非常相似,而且实验测得的荧光寿命与Levenburg-Marquardt方法偏差在0.2%以内.
参考文献
[1] | 沈林放,钱景仁.高稳定宽频带掺饵光纤超荧光光源[J].光学学报,2001,21(3):300-304. |
[2] | 李乙钢,刘伟伟,付成鹏,等.大功率掺Yb双包层光纤宽带超荧光光源[J].光学学报,2001,21(10):1171-1173. |
[3] | 赵春柳,关柏鸥,董新永,等.新型双波长激光增益控制掺钮光纤放大器[J].光学学报,2002,22(11):1331-1335. |
[4] | 孙宏志,梁建中,胡谊梅,等.高效率可调谐掺镜双包层光纤激光器研究[J].光学学报,2002,22(11):1372-1374. |
[5] | Jung J, Lee B. Erbium-doped fiber temperature sensor with high resolution using 1 480 nm pump laser[J]. Proceedings of SPIE,1999,3746 :538-541. |
[6] | Wade S A, Muscat J C, Collins S F, et al. Nd3+ doped optical fiber temperature sensor using the fluorescence intensity ratio technique[J]. Review of Scientific Instruments, 1999,70(11) :4279-4282. |
[7] | Zhang Z Y, Grattan K T V, Hu Y L, et al. Prony's method for exponential lifetime estimations in fluorescence-based thermometers [J]. Review of Scientific Instruments, 1996,67(7) :2590-2594. |
[8] | 李伟,陈坚,相秉仁,等.基于荧光猝灭原理的光纤化学传感器定量分析模型的建立与应用[J].化学学报,2001,59(1);109-114. |
[9] | 阮复昌,李向明,莫炳禄,等.一种用于测定氧浓度的荧光传感器的开发及研究[J].传感技术学报,1997(3): 22-26. |
[10] | Gratten K T V, Sun T, Wade S A, et al. Optical fiber fluorescence-based sensor techniques for high temperature measurement[A].Proceedings of 1st International Symposium on Optical and Quantum Technology [C]. Bangkok, Thailand, 2001.8-16. |
[11] | Zhang Z Y, Grattan K T V, Palmer A W. A novel signal processing scheme for a fluorescence based fiber-optic temperature sensor [J]. Review of Scientific Instruments, 1991,62(5) .. 1735-1742. |
[12] | Fernicola V, Crovini L. Digital optical fiber point sensor for high-temperature measurement [J]. Journal of Lightwave Technology, 1995,13(7) : 1331-1334. |
[13] | Sun W M, Zhang J Z, Yu L, et al. Measurement of deeay time based on FFT[J]. Optics & Laser Technology, 2004, 36(4) :323-326. |
[14] | Sun T, Grattan K T V, Sun W M. Fluorescence based optical fibre fire alarm system[A]. Proceeding of OFS2002 [C]. Hilton Portland, USA, 2002. 471-474. |
[15] | 赵言诚,孙伟民,孙秋华,等.全光纤火警报警系统[J].光学技术,2003,29(3);301-303. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%