Real-time Spectroscopy with Sub-GHz Resolution using Amplified Dispersive Fourier Transformation
Abstract
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 loss-less -11.76 ns/nm dispersive device is used to demonstrate single-shot gas absorption spectroscopy with 950 MHz resolution--a record in real-time spectroscopy.
Keywords
Cite
@article{arxiv.0803.1654,
title = {Real-time Spectroscopy with Sub-GHz Resolution using Amplified Dispersive Fourier Transformation},
author = {J. Chou and D. R. Solli and B. Jalali},
journal= {arXiv preprint arXiv:0803.1654},
year = {2009}
}
Comments
The following article has been accepted by Applied Physics Letters