宽谱段可编程精细大气光谱探测技术研究

As one new kind of the scientific instrument for atmospheric composition detection,a wide-spectral-band and super-fine programmable imaging spectrometer prototype, which combines the high-speed electronic tunability of AOTF and the super-fine spectral resolution of the immersion echelle grating, will be developed. The spectral overlap is avoided by choosing the diffracting order of the immersion echelle grating by AOTF. The instrument can arbitrarily select and analyze the super-fine structure of any narrow spectral pass-band in the wide range of spectral band(1.5um～2.5um) and be used for the detection of the content and distribution of atmospheric composition.The technical scheme effectively solves the contradiction of the wide spectral band and the super-fine spectral resolution and has such characteristics as wide spectral range, super-fine spectral analysis, high detection sensitivity, high repetition precision and on-demand acquisition of spectral information. The compactness, configurability and no moving parts effectively ensure the technically feasible realization, agile operation and consistent measuring. As a space-borne or airborne payload or a common scientific instrument, it has the vast application potential in the field of atmospheric detection, environmental monitoring etc.

本项目面向大气成份探测需求，结合声光可调谐滤光器(AOTF)的通带可快速电调谐特性和浸入式中阶梯光栅的超精细分光能力，利用AOTF 选择浸入式中阶梯光栅级数以消除衍射级间光谱混叠，提出了一种新型宽谱段可编程精细大气光谱探测方案，具有宽波段范围（1.5um～2.5um）内任意选择光谱窄带进行精细分析的能力（光谱分辨率达0.2nm）。该方案有效解决了宽谱段和高光谱分辨率的矛盾以及光谱分辨率高时光栅尺寸过大的难题，具有宽光谱覆盖、超精细分光、高探测灵敏度、高重复精度、按需光谱获取、小型紧凑、配置灵活、无运动部等特色，可以适用于星载、空载等各种平台，也可以开发成通用科学仪器，在大气探测、环境监测等领域具有广泛应用前景。

本项目面向大气成份探测需求，结合声光可调谐滤光器(AOTF)的通带可快速电调谐特性和浸入式中阶梯光栅的超精细分光能力，利用 AOTF 选择浸入式中阶梯光栅级数以消除衍射级间光谱混叠，提出了一种新型宽谱段可编程精细大气光谱探测方案，具有宽波段范围（1.5um～2.5um）内任意选择光谱窄带进行精细分析的能力（光谱分辨率达 0.2nm）。该方案有效解决了宽谱段和高光谱分辨率的矛盾以及光谱分辨率高时光栅尺寸过大的难题，具有宽光谱覆盖、超精细分光、高探测灵敏度、高重复精度、按需光谱获取、小型紧凑、配置灵活、无运动部等特色，可以适用于星载、空载等各种平台，也可以开发成通用科学仪器，在大气探测、环境监测等领域具有广泛应用前景。