光纤Fabry-Perot谐振腔的精细度对相位灵敏度的影响

分析了光纤Fabry-Perot谐振腔的工作原理及其工作点的选择问题，推导了谐振腔的光学相位灵敏度与精细度的关系，给出了理论公式及曲线，并与光纤Math-Zehnder干涉进行了对比，指出了在相位灵敏度上两者的巨大差距，证明了光纤Fabry-Perot干涉的独特优点.介绍了光纤Fabry-Perot干涉的实验系统，提出了检测及计算Fabry-Perot谐振腔有效精细度的方法，实验结果与理论仿真基本吻合.     

Research on cotton fiber qualities evaluation based on optoelectronic techniques

The fine and mature cotton fibers can make it possible to spin a finer yarn, and fineness and maturity of cotton fibers were essential qualitative characteristic, however, there was no direct or indirect measurement method that was both fast and reliable to estimate them. In this paper, a novel method was put forward to assess cotton fiber fineness and maturity based on optoelectronic measuring techniques. The experimental results were compared between the microscope measurement and system measurement and the linear fit results of two measuring methods of that linear fit were 0.98788, and standard deviation was 0.19081. Average cross-sectional widths of cotton samples measured by the microscope and the system had a fairly low correlation with the micronaire data. The linear fit results of the fiber maturity ratio of two measuring methods were 0.95587, and standard deviation was 0.33203. This method can be done in the lab and be used in the industry adherent to the present measurement instruments, for example AFIS, after improved.