We present a simple technique for measuring coherence times for stationary light fields using a single detector with tunable time resolution. By measuring the equal-time second-order correlation function at varying instrument response functions it is possible to determine the coherence time and also the shape of the temporal decay without the need to record time-resolved data. The technique is demonstrated for pseudothermal light. Possible applications for dynamic light scattering and photon statistics measurements are discussed.
© 2012 Optical Society of America
Coherence and Statistical Optics
Original Manuscript: March 14, 2012
Revised Manuscript: May 24, 2012
Manuscript Accepted: May 28, 2012
Published: July 4, 2012
Marc Assmann and Manfred Bayer, "Coherence time measurements using a single detector with variable time resolution," Opt. Lett. 37, 2811-2813 (2012)