title: Ultrafast and versatile spectroscopy by temporal Fourier transform.
abstract: One of the most remarkable and useful properties of a spatially converging lens system is its inherent ability to perform the Fourier transform; the same applies for the time-lens system. At the back focal plane of the time-lens, the spectral information can be instantaneously obtained in the time axis. By implementing temporal Fourier transform for spectroscopy applications, this time-lens-based architecture can provide orders of magnitude improvement over the state-of-art spatial-dispersion-based spectroscopy in terms of the frame rate. On the other hand, in addition to the single-lens structure, the multi-lens structures (e.g. telescope or wide-angle scope) will provide very versatile operating conditions. Leveraging the merit of instantaneous response, as well as the flexible lens structure, here we present a 100-MHz frame rate spectroscopy system - the parametric spectro-temporal analyzer (PASTA), which achieves 17 times zoom in/out ratio for different observation ranges.
authors.affiliation: Photonic Systems Research Laboratory, Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.
authors.forename: Chi
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Photonic Systems Research Laboratory, Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wei
authors.affiliation: College of Engineering, Swansea University, Singleton Park, Wales SA2 8PP, UK.
authors.forename: Michel E
authors.initials: ME
authors.lastname: Marhic
authors.affiliation: Photonic Systems Research Laboratory, Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.
authors.forename: Kenneth K Y
authors.initials: KK
authors.lastname: Wong