Picqué Nathalie, Guelachvili Guy, Kachanov Alexander A
Laboratoire de Photophysique Moléculaire, Unité Propre du Centre National de la Recherche Scientifique, Université de Paris-Sud, Bâtiment 350, 91405 Orsay-Cedex, France.
Opt Lett. 2003 Mar 1;28(5):313-5. doi: 10.1364/ol.28.000313.
Spectra composed of hundreds of time components for absorption path lengths of up to 130 km have been recorded near 1050 nm by combination of two recent techniques, intracavity laser spectroscopy with vertical external cavity surface-emitting multiple-quantum-well lasers and time-resolved Fourier transform spectroscopy. A sensitivity of 1 x 10(-10) cm(-1) Hz(-1/2) is achieved for 10(4) simultaneously acquired spectral elements, 3 orders of magnitude better than the sensitivity obtained in previous similar experiments. Specific advantages of the method, especially for frequency and intensity metrology of weak absorption transitions, are discussed.
通过将腔内激光光谱技术与垂直外腔面发射多量子阱激光器以及时间分辨傅里叶变换光谱这两种最新技术相结合，在1050纳米附近记录到了吸收路径长度高达130千米、由数百个时间成分组成的光谱。对于10⁴个同时获取的光谱元素，实现了1×10⁻¹⁰厘米⁻¹赫兹⁻¹/²的灵敏度，比之前类似实验获得的灵敏度提高了3个数量级。文中讨论了该方法的具体优势，特别是在弱吸收跃迁的频率和强度计量方面。
