We describe a low-cost modification based on the research of Arecchi <i>et al</i>. [Opt. Commun. <b>3,</b> 284–288 (1971)] on a standard photon correlation spectroscopy setup for measuring small (≃1%) and fast (resolution, ≃10 ns) light fluctuations. Details of the electronics and optics permit the apparatus to be easily reproduced. Careful tests show that spurious correlations of ≤1% can be achieved with standard detectors only when taking precautions with the electronics. Moreover, measurements on latex spheres, ellipsoids, and protein solutions show that fast and very small light fluctuations (≃1−5%) can be studied versus scattering vector and light polarization.
© 1999 Optical Society of America
(040.5250) Detectors : Photomultipliers
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(290.1990) Scattering : Diffusion
(290.5850) Scattering : Scattering, particles
Giuseppe Chirico and Marco Gardella, "Photon Cross-Correlation Spectroscopy to 10-ns Resolution," Appl. Opt. 38, 2059-2067 (1999)