本程序可读取Yokogawa 光谱仪多个数据文件(CSV格式)并寻峰。数据文件为多个光栅串的测试光谱。串联光栅波长间隔等距，可确定等距串联光栅的中心波长和峰值强度，将数据存入mat file
使用前请设置若干重要参数 【wl_start】 【wl_end】 【FBGs_num】 【Min_PowerValue】【Peaks_seperation】
其他相关变量说明
　【OSA_data】　所读入的光谱全图 里面可能包含更宽的波长
　【OSA_data_FBGs】截取光栅串所在波长区间，由【wl_start】 【wl_end】决定
导出的数据文件为 FBGs.mat， 其中所保存的 重要变量为 【FBGs_peaks】
　【FBGs_peaks】 第1列：峰值所在序号； 第2列：横轴-光栅串中心波长值； 第3列：纵轴-光栅串光强值(This m-code can read multiple data files (CSV format) of the Yokogawa spectrometer and find the peaks. The data file is measured spectrum for multiple FBG series. The wavelength interval of the FBGs is equal distance, and the center wavelength and peak intensity of the FBGs can be determined, and　stored in mat file.
Please set up a number of important parameters before use
[wl_start] [wl_end] [FBGs_num] [Min_PowerValue] [Peaks_seperation]
Other relevant variables
[OSA_data] The full spectrum of the spectra read in OSA_data may contain wider wavelength range
[OSA_data_FBGs] the wavelength range of the FBGs is determined by [wl_start] [wl_end]
The exported data file is FBGs.mat, where the important variable is [FBGs_peaks].
[FBGs_peaks] first column: peak number, second column: axis - center wavelength value, third column: longitudinal axis - peak intensity.)