Abstract
The second-order correlation function of incoherent light, which is usually measured in the time domain, can be alternatively measured in the frequency domain. Here, we use an all-optical technique in a highly nonlinear fiber for measuring the full spectrum of the fluctuations of the photocurrent (rf spectrum) generated by broadband radiation with different spectral coherence properties. Our experiments reveal that the rf spectrum of a light signal depends strongly on its spectral coherence properties. From a practical perspective, this ultrafast technique constitutes an alternative for measuring the intensity correlations of spectrally incoherent radiation.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
C. Michel, P. Suret, S. Randoux, H. R. Jauslin, and A. Picozzi
Opt. Lett. 35(14) 2367-2369 (2010)
Goëry Genty, Minna Surakka, Jari Turunen, and Ari T. Friberg
Opt. Lett. 35(18) 3057-3059 (2010)
Fabien Boitier, Antoine Godard, Aleksandr Ryasnyanskiy, Nicolas Dubreuil, Philippe Delaye, Claude Fabre, and Emmanuel Rosencher
Opt. Express 18(19) 20401-20408 (2010)