2008/03/11 by Jason Chou, J. Chou, Daniel R. Solli +3 · 2 citations
Chemistry · Engineering · Physics and Astronomy · #Spectroscopy and Laser Applications #Spectroscopy and Quantum Chemical Studies #Terahertz technology and applications #physics.optics
paper · pdf · doi:10.1063/1.2896652
The following article has been accepted by Applied Physics Letters
arxiv created 2008/03/11 · openalex publication_date 2008/03/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Dispersive Fourier transformation is a powerful technique in which spectral information is mapped into the time domain using chromatic dispersion. It replaces a spectrometer with an electronic digitizer and enables real-time spectroscopy. The fundamental problem in this technique is the trade-off between the detection sensitivity and spectral resolution, a limitation set by the digitizer’s bandwidth. This predicament is caused by the power loss associated with optical dispersion. We overcome this limitation using Raman-amplified spectrum-to-time transformation. An extraordinary lossless −11.76ns∕nm dispersive device is used to demonstrate single-shot gas absorption spectroscopy with a 950MHz resolution—a record in real-time spectroscopy.