Li Zhiyun, Deen M Jamal, Fang Qiyin, Selvaganapathy P R
School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada.
Appl Opt. 2012 Oct 1;51(28):6855-63. doi: 10.1364/AO.51.006855.
In order to simplify the design process of microfabricated concave gratings, simplified algorithms for fast characterization of the concave grating were developed. These algorithms can be used to assist system designers using ray-tracing software in the determination of optimum design parameters considering the requirements and restrictions for specific applications. According to the algorithms, it is feasible to design a flat field microconcave grating with a 4 mm grating radius as a key component in a micro-Raman spectrometer system for inline environmental monitoring applications. This microspectrometer operates over the spectral wavelength band from 785 nm to 1000 nm and has a spectral resolution of 2 nm at 900 nm. The total size of the system is 1 mm×4 mm×3.7 mm, making it one of the smallest for this wavelength range and spectrum resolution.
为了简化微纳加工凹面光栅的设计过程，开发了用于快速表征凹面光栅的简化算法。这些算法可用于协助使用光线追踪软件的系统设计师，在考虑特定应用的要求和限制的情况下确定最佳设计参数。根据这些算法，设计一个光栅半径为4毫米的平场微凹面光栅作为在线环境监测应用的微拉曼光谱仪系统的关键部件是可行的。该微型光谱仪在785纳米至1000纳米的光谱波段上运行，在900纳米处具有2纳米的光谱分辨率。系统的总尺寸为1毫米×4毫米×3.7毫米，使其成为该波长范围和光谱分辨率下最小的系统之一。
