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报道新型差分速度调制激光光谱技术的实验研究工作．利用这种新型差分速度调制激光光谱技术，测量了Ｎ_２~＋ Ａ~２∏_ｕ－Ｘ~２∑_ｇ~＋（２，０）带的跃迁谱线，得到的谱线信噪比超过５００：１，较非差分速度调制光谱技术提高６０倍左右．利用这套光谱仪，观测到了ＣＳ~＋Ａ~２∏_（３／２）－Ｘ~２∑~＋（１，０）带的高分辨电子吸收光谱，表明这种激光光谱技术在探测分子离子方面有着广阔的应用前景．
Reported the experimental research of the new differential speed modulation laser spectroscopy. The transition spectrum of N_2 ~ + A ~ 2Π_u-X ~ 2Σ_g ~ + (2,0) band was measured by this new differential velocity modulation laser spectroscopy. The obtained signal-to- 1, 60 times faster than non-differential speed modulation spectroscopy. The high resolution electron absorption spectrum of CS ~ + A ~ 2Π_ (3/2) -X ~ 2Σ ~ + (1,0) band was observed by using this spectrometer, indicating that this laser spectroscopy is effective in detecting molecular ions Has a broad application prospects.