AN INTEGRATED OPTICAL SENSOR FOR MEASURING GLUCOSE-CONCENTRATION

被引:63
作者
LIU, Y
HERING, P
SCULLY, MO
机构
[1] UNIV NEW MEXICO,DEPT PHYS & ASTRON,ALBUQUERQUE,NM 87131
[2] UNIV DUSSELDORF,INST LASERMED,W-4000 DUSSELDORF 1,GERMANY
[3] MAX PLANCK INST QUANTUM OPT,W-8046 GARCHING,GERMANY
来源
APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY | 1992年 / 54卷 / 01期
关键词
07.60; 42.80F; 42.81;
D O I
10.1007/BF00331729
中图分类号
O59 [应用物理学];
学科分类号
摘要
We used an optical sensor combined with a Mach-Zehnder interferometric waveguide and optical fibers to measure slight changes of aqueous sugar concentrations. The merits of this sensor are simplicity, reliability, high sensitivity and continuous monitoring. The technique is based on the fact that the refractive index of sugar solution changes with the concentration of sugar. In the experiment, one arm of the interferometer is clad with glue and is thus isolated from the sugar solution. The other one is exposed to the sugar solution. A single mode fiber is directly glued onto the interferometric waveguide, to guide the light into the interferometer. If the concentration of sugar covering the waveguide changes, the phase of propagating light in the exposed arm will be changed, while the phase in the other arm is fixed. Hence the output intensity from the interferometer is directly related to the concentration of the sugar solution. The result of this experiment yields the relation between the sugar concentration and output signal. From 0% to 1% concentration of sugar solution, there is only a 1.4 x 10(-3) refractive index difference. Two sets of experimental data have been obtained, showing a linear relation between the sugar concentration and the output signal from our sensor. This sensor could be used for continuous monitoring of blood sugar in the human body.
引用
收藏
页码:18 / 23
页数:6
相关论文
共 3 条
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