Spectrographs with ultra-high spectral resolution,ultra-high wavelength calibration accuracy, and wide spectral range hold immense potential in broad scientific frontiers,such as precise spectral measurement,femtosecond pulse shaping,and spectral beam combining,etc.

In this paper,we have constructed a virtually imaged phased array(VIPA)based spectrograph, leveraging a laser frequency comb for precise wavelength calibration.The calibration methods specifically for the broadband VIPA spectrograph are presented.The spectrograph achieves a resolution exceeding 650 000,a wavelength calibration accuracy better than 0.05 pm,and a remarkable bandwidth of over 110 nm.Spectral measurements are conducted with the spectrograph,and the results validate the performance.