提出并实验演示了一种新型的超高分辨率光谱测量技术，通过将二维分光的高分辨率面阵光谱仪和可调谐法布里-珀罗(F-P)干涉仪相结合来实现超高分辨率的光谱测量，其中高分辨率面阵光谱仪的分辨率优于可调谐F-P干涉仪的自由光谱范围(FSR)。所采用的可调谐F-P干涉仪光谱范围为780~840 nm，FSR为3.75 GHz，精细度大于100。利用虚拟成像阵列和平面衍射光栅构建了二维分光面阵光谱仪，实现了17.4 nm(792~809.4 nm)光谱范围内0.7 GHz的光谱分辨率，分辨率值高于可调谐F-P的FSR。二者的结合实现了优于37.5 MHz的超高光谱分辨率。利用所构建的光谱仪实际测量了锁模钛宝石激光器的激光光谱，证实可以较为清晰地分辨其间隔为76.3 MHz的各个纵模。

A new method for hyperfine spectrum measurement is mentioned and experimentally demonstrated. Ultra-high-resolution spectrometry is obtained through incorporating a two-dimensional (2-D) dispersing CCD spectrometer and a tunable Fabry- Perot (F- P) filter and the spectral resolution of the 2- D dispersing CCD spectrometer is better than that of the tunable F-P filter. The F-P scanning interferometer covers a wavelength range of 780~840 nm with a free spectral range (FSR) of 3.75 GHz and a fineness of 100. With the use of 2- D dispersing CCD spectrometer consisting of a virtually-imaged phased-array (VIPA) and a diffraction grating, realtime high- resolution spectral measurement has been realized in a wide spectral range. Resolution as high as 0.7 GHz obtained with the 2-D dispersing CCD spectrometer in a spectral range of 17.4 nm (792~809.4 nm), is higher than that of the tunable F- P filter. By combining the 2- D spectrometer with a tunable F- P based scanning interferometer, hyperfine spectral resolution higher than 37.5 MHz is achieved. The laser spectrum of the modelocked Ti:sapphire laser is measured with the spectrometer, proving that its longitudinal mode with the spacing of 76.3 MHz can be distinguished clearly.