【摘 要】
：
介绍了一种利用快速傅里叶变换算法对稀土掺杂物质的荧光寿命进行数据拟合的方法.稀土掺杂物质可用来制备多种光学传感器,用于温度、pH值等多种参量测量领域.本方法利用快速
【机 构】
：
哈尔滨工程大学理学院,哈尔滨工程大学信息和通信工程学院,School of Engineering
论文部分内容阅读
介绍了一种利用快速傅里叶变换算法对稀土掺杂物质的荧光寿命进行数据拟合的方法.稀土掺杂物质可用来制备多种光学传感器,用于温度、pH值等多种参量测量领域.本方法利用快速傅里叶变换(FFT)结果作为基础,从非零项的相位角的正切值得出被测的荧光寿命,具有速度快、误差小、不受本底干扰等一系列优点.以掺铒光纤为例,通过数字仿真将本方法与其它几种传统的拟合方法进行了比较.快速傅里叶变换方法的测量偏差不到Prony方法的50%,为对数似合(log-fit)方法测量偏差的1/6.另外,快速傅里叶变换方法由于不受本底噪声影响,可以不必在信号处理时去掉本底噪声,因而可以明显缩短测量时间.
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