基于强度调制的新型偏振光谱仪调制器优化设计

强度调制是一种高光谱偏振信息获取新方法,可有效地解决现有测量法存在的不足。调制器是其中的关键硬件模块之一。从调制器实现偏振、光谱信息调制的基本原理入手,结合偏振、光谱信息的解调理论,提出了调制器参数优化设计方法,并对该方法进行了计算机数值模拟。结果表明:经过优化设计的调制器产生的各个载波信号的频率在光谱仪的采样带宽内均匀分布,有效地拓展了可测Stokes矢量元素谱的带宽范围,也为后续的偏振、光谱信息的高保真解调奠定了基础。

Optimum design of the modulator in the novel spectropolarimeter based on intensity modulation

The intensity modulation is a novel method to acquiring high-spectrum polarization information and can be used to resolve the backwards of the old methods.The modulator is one of the key models in it.The optimum design method of the modulator is proposed from the principle that the Stokes elements spectrum is modulated by the modulator and that how they are demodulated.The optimum design method is stimulated on computer.The results show the carrier frequency produced by optimized modulator is distributed evenly in the bandwidth of the spectrometer,and this makes it possible to measure higher frequency Stokes elements spectrum.The optimized modulator is also the base that the Stokes elements spectrum can be demodulated high fidelity.