Construction of high-resolution software correlator in photon correlation spectroscopy

Guiqiang Liu; Guanling Yang; Siming Zeng

doi:10.1117/12.756694

8 January 2008 Construction of high-resolution software correlator in photon correlation spectroscopy

Guiqiang Liu, Guanling Yang, Siming Zeng

Proceedings Volume 6838, Optoelectronic Devices and Integration II; 68381U (2008) https://doi.org/10.1117/12.756694
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

A double-time model software correlator with 5ns time resolution was presented. This correlator includes 12 independent linear correlators. A simple algorithm used for counting the number of photon signals and computing the correlation function on line, was complied by using the graphical programming language Labview8.2. By using of a photomultiplier tube (PMT), a National Instruments Model PXI-5152 high-speed acquisition board, a National Instruments Model PXI-8105 control system, correlation functions can be worked out in real time over time scales of 5μs and processing in blocks down to time scales of ~10ms. Its performances were tested by using polystyrene spheres and silicon dioxide spheres diluted in water. These two kinds of nanoparticles are in different sizes. The correlation functions computed indicate that our correlator is feasible to compute the correlation functions in photon correlation spectroscopy (PCS).

Citation Download Citation

Guiqiang Liu, Guanling Yang, and Siming Zeng "Construction of high-resolution software correlator in photon correlation spectroscopy", Proc. SPIE 6838, Optoelectronic Devices and Integration II, 68381U (8 January 2008); https://doi.org/10.1117/12.756694

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