基于FPGA的静态傅里叶变换光谱探测系统研究  

Study on Static Fourier Transform Spectrometry System Based on FPGA

作　　者：付林[1] 刘辉志[2] 

机构地区：[1]中山职业技术学院电子信息工程系,广东中山528404 [2]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《半导体光电》2011年第2期287-291,共5页Semiconductor Optoelectronics

摘　　要：为克服傅里叶变换光谱仪的机械扫描和光谱复原中软件处理实时性差的缺点,研究了一种基于FPGA的静态傅里叶变换光谱探测系统。根据傅里叶变换光谱理论,确立了选用等效斜楔干涉具和线阵COMS的方案,使用FPGA来实现,并详细介绍了系统工作原理。利用硬件描述语言VerilogHDL,在Vitex pro-2FPGA芯片上,实现了探测系统CMOS驱动电路、光谱复原处理电路等逻辑设计,并通过第三方仿真软件Modelsim6.3f完成了各模块的功能仿真。应用该实验系统对波长为635nm的半导体激光器进行了光谱探测,测试结果与MATLAB仿真计算值一致。实验结果表明该光谱探测系统具有运算速度快、实时性和可靠性好等优点。In order to overcome the mechanical scanning and poor real-time software processing in spectrum recovery,a sort of static Fourier transform spectrometry system based on FPGA was studied.Based on the Fourier transform spectrometry theory,the design scheme of the system is established by using a modified wedge interferometer,a linear CMOS detector and FPGA.The principles of the system are described in detail.In the Field Programmable Gate Array of Xilinx＇s chip,the Verilog Hardware Designing Language is used to design the system modules,which contain the CMOS driving circuit,spectrum recovery processing circuit and so on.And the functional simulations of each module are completed with the third-party simulation software： Modelsim6.3f.The system is used to measure the spectra of 635 nm semiconductor lasers.The measurement results are concordant with the MATLAB simulation values.It shows that this system has the advantages of real-time,high reliability and fast speed.

关 键 词：傅里叶变换光谱 光谱复原处理 等效斜楔干涉具 线阵COMS 

分 类 号：O657.33[理学—分析化学]