Picqué N, Guelachvili G
Laboratoire de Photophysique Moléculaire, Unité Propre du Centre National de la Recherche Scientifique, Université de Paris-Sud, Bâtiment 350, 91405 Orsay Cedex, France.
Appl Opt. 2000 Aug 1;39(22):3984-90. doi: 10.1364/ao.39.003984.
The first instrumental setup, to our knowledge, that is capable of recording in a few hours the time-resolved Fourier transform (TRFT) interferograms of gas-phase spectra that cover several thousands of inverse centimeters with spectral- and time-resolution limits that are equal, at best, to 2.5 x 10(-3) cm(-1) and 2 ns, respectively, is reported. It was developed on the stepping-mode Connes-type interferometer of the Laboratoire de Photophysique Moléculaire Université de Paris Sud. Also, for the first time, to our knowledge, these high-resolution TRFT spectra, illustrated with the Doppler-limited emission spectra of the N(2) transitions (B-A) and (B'-B) between 5500 and 11 000 cm(-1) and of the atomic Ar lines between 1800 and 4000 cm(-1), are recorded in the infrared spectral range. To obtain identical results that have the same signal-to-noise ratio, we should have increased the recording time of our unique previous high-information TRFT spectra by approximately 50,000. In other words, one hour is now long enough to obtain what would previously have required six years to record.
据我们所知，首个能够在数小时内记录气相光谱的时间分辨傅里叶变换（TRFT）干涉图的仪器装置已被报道，其光谱覆盖范围达数千波数厘米，光谱分辨率和时间分辨率极限分别至多为2.5×10⁻³厘米⁻¹和2纳秒。该装置是在巴黎南大学分子光物理实验室的步进模式康奈斯型干涉仪上研发的。此外，据我们所知，这些高分辨率TRFT光谱首次在红外光谱范围内被记录，文中展示了N₂在5500至11000厘米⁻¹之间的（B - A）和（B' - B）跃迁以及Ar原子在1800至4000厘米⁻¹之间谱线的多普勒极限发射光谱。为了获得具有相同信噪比的相同结果，我们需要将之前唯一的高信息TRFT光谱的记录时间增加约50000倍。换句话说，现在一小时就足以获得之前需要六年时间才能记录到的结果。
