Dispersive Fourier-Transform Spectroscopy

Research | Dispersive Fourier-Transform Spectroscopy
Dispersive Fourier-Transform Spectroscopy
In contrast to traditional spectroscopy in which an optical spectrum is obtained by spatially dispersing light with a prism or diffraction grating onto a detector array, we employ a new type of spectroscopy method known as dispersive Fourier transformation – an optical process that maps the spectrum of an optical pulse into a time-domain waveform using group-velocity dispersion and simultaneously amplifies it in the optical domain. This technique removes spatial diffractive elements and a detector array in the conventional spectrometer and hence enables ultrafast real-time spectroscopic studies of various ultrafast phenomena for a better understanding of them as well as for developing a new class of applications.
[1] D. R. Solli, G. Herink, B. Jalali, and C. Ropers, “Fluctuations and correlations in modulation instability,” Nature Photonics doi:10.1038/nphoton.2012.126 (2012)

​[2] K. Goda, D. R. Solli, K. K. Tsia, and B. Jalali, “Theory of amplified dispersive Fourier transformation,” Physical Review A 80, 043821 (2009)
[3] D. R. Solli, J. Chou, and B. Jalali, “Amplified wavelength-time transformation for real-time spectroscopy,” Nature Photonics 2, 48 (2008)
[4] K. Goda, D. R. Solli, and B. Jalali, “Real-time optical reflectometry enabled by amplified dispersive Fourier transformation,” Applied Physics Letters 93, 031106 (2008)
[5] J. Chou, D. R. Solli, and B. Jalali, “Real-time spectroscopy with subgigahertz resolution using amplified dispersive Fourier transformation,” Applied Physics Letters 92, 111102 (2008)
[6] J. Chou, Y. Han, and B. Jalali, “Time-wavelength spectroscopy for chemical sensing,” IEEE Photonics Technology Letters 16, 1140 (2004)
[7] P. V. Kelkar, F. Coppinger, A. S. Bhushan, and B. Jalali, “Time-domain optical sensing,” Electronics Letters 35, 1661 (1999)

Peter Devore