Chu Qihang, Li Xiaotian, Sun Ci, Chen Jun, Wang Jianing, Sun Yuqi
Opt Express. 2022 Mar 28;30(7):10547-10562. doi: 10.1364/OE.448504.
A cross-dispersed spatial heterodyne spectrometer (CDSHS) that integrates a spatial heterodyne spectrometer (SHS), a reflection grating, and a cylindrical lens is presented. Expressions for the width, height, and location of the cross-dispersed interferograms corresponding to narrow spectral regions are given. An example CDSHS design, including numerical simulations of the interferogram and the spectrum, is provided to illustrate the designed system. The results show that the CDSHS can simultaneously disperse longitudinally and laterally to record interferograms corresponding to different narrow spectral regions with different rows on a charge-coupled device, and obtain independent detailed spectra simultaneously with a high signal-to-noise ratio. Additionally, high-intensity light rays at a specific wavelength in the CDSHS do not interfere with the detailed spectra of the other wavelengths. Simultaneously, the CDSHS offers advantages including high resolution, high throughput, broadband operation, compactness, and zero moving parts. The CDSHS shows great application potential in fields including multiple spectral feature measurement, weak spectral measurements.
本文介绍了一种交叉色散空间外差光谱仪（CDSHS），它集成了空间外差光谱仪（SHS）、反射光栅和柱面透镜。给出了对应于窄光谱区域的交叉色散干涉图的宽度、高度和位置的表达式。提供了一个CDSHS设计实例，包括干涉图和光谱的数值模拟，以说明所设计的系统。结果表明，CDSHS可以同时进行纵向和横向色散，在电荷耦合器件上用不同的行记录对应于不同窄光谱区域的干涉图，并以高信噪比同时获得独立的详细光谱。此外，CDSHS中特定波长的高强度光线不会干扰其他波长的详细光谱。同时，CDSHS具有高分辨率、高通量、宽带操作、紧凑性和零运动部件等优点。CDSHS在多光谱特征测量、微弱光谱测量等领域具有巨大的应用潜力。
