Abstract：In this paper, the authors reported a new method for measuring transient time-dependent spectra using multi-fiber delay coupler and optical multi-channel analysis technique. The fiber delay coupler consists of five fibers with different lengths and its time-delay between two fibers is determined by the different fiber lengths. The light beams that came from the fiber coupler were coupled by a lens system into the slit of a spectrograph and formed a spectral pattern on the focus plane of the spectrometer. A two-dimensional CCD detector convested the optical pattern into an electrical pattern, and then the transient time-dependent spectra were obtained by a personal computer. The experimental setup was constructed, and the transient time-dependent spectra were measured for KCl crystal shocked by a high speed pill. The time resolution was 20 ns, and the spectral intensity resolution reached 1/18 bit.
[1] LI Yuan-qian, HU Jing-mei, YANG Jing-guo et al. Analytica Chimica Acta, 2002, 461: 181. [2] YANG Jing-guo, LI Yuan-qian, HA Yuan-qing et al(杨经国，黎源倩，哈元清等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，1999，19(2)：212. [3] Thompson C E. LLNL. Report.，1996. [4] YANG Jing-guo, MENG Jian-ping, HA Yuan-qian et al. SPIE, 2002，4829：533 . [5] MENG Jian-ping et al(蒙建平等). Laser Journal(激光杂志)，2001，22(4)：22. [6] HE Ying-hong et al(贺应红等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，录用待发表.
