声光频谱分析器的信号处理
THE DATA PROCESSING TECHNIQUE OF THE IOAOSA
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摘要: 集成光学声光频谱分析器是由半导体激光器、导波声光调制器、波导短程透镜和CCD探测器阵列所构成。CCD探测器把接收的光信号转换成电信号,再由TMS32010系统与IBM-PC机组成的主从工作机的信号处理中心进行处理。微机系统中的CPU采用TMS-32010。CCD视频信号采集用循环间隔采样方式。此样机达到的指标:系统带宽为100MHz,分辨率为8MHz,动态范围为20dB。Abstract: An IOAOSA (Integrated Optical Acoustooptic Spectrum Analyzer) system consists of semiconductor laser, acoustooptic modulator, geodesic lenses, and CCD detector array. The optical signal is converted to electrical signal by CCD array of the IOAOSA processor, and then the signal is processed by the signal processing center which consists of TMS32010 system and IBM-PC. The TMS32010 is used in the microcomputer system. It has very high speed. A cyclic sample method is used to collect the data of the CCD video signal, sampling one point every 40 points. After processing, the frequency bandwidth. the resolution and the dynamic range of the system are measured to be 100MHz, 8MHz and 20dB respectively.
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M. K. Barnoski, Bor-Uei Chen et al., IEEE Trans. on CAS, CAS-26(1979) 12, 1113-1124.[2]J. W.顾德门, Fourier光学导论,科学出版社,北京,1979年,第五章,第二节.[3]中国科学院声学所中国软件技术开发部, TMS32010 数字信号处理器软件和硬件开发技术,1987年5月. -
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