A widely tunable fs laser system with a repetition rate of 1ghz, consisting of a ghz fs oscillator and a harmonically pumped ghz opo, with a separate autocorrelator
as diagnostic tool.
Laser Light ScatteringDynamic light scattering was carried out by a commercial LLS spectrometer BI-200SM motor- driven goniometer equipped with BI-9000AT digital autocorrelator
or the BI-9025AT photon counter and a cylindrical 22mW uniphase HeNe laser (wave length 637nm) and BI-ISTW software was used.
The system was set by bypassing the high pass filter, while the low frequency Doppler shifts were input directly into an autocorrelator
Work has recently been completed at the University of Tennessee, Chattanooga Department of Physics, Geology and Astronomy on the software configuration of an autocorrelator
for use in dynamic light scattering experiments.
, the standard pulse-diagnostic device since the 1960s, requires recombining two pulses in a carefully aligned second harmonic generation (SHG) crystal that yields only a rough measure of the length of the pulse in time.
Zipfel has several other applications for the PD2-DIO board including an inexpensive autocorrelator
for a biophysical technique know as Fluorescence Correlation Spectroscopy (FCS) and to replace more expensive "multichannel sealers" he has previously used for several other types of biophysical and photophysical measurements.
The resulting scattered light is collected by a second fibre and then analyzed using the established technique of Dynamic Light Scattering and the company's own BL9000AT digital autocorrelator
Infrasonic Energy Autocorrelator
, Publicacion Observatorio San Calixto, La Paz, Bolivia, 10 pp.
option enables the Tristar to be connected to a dynamic light scattering instrument to determine the diffusion coefficients "on the fly".
Creating Use of LabView in a Dynamic Light Scattering Autocorrelator
BI-9000AT is state-of-the-art digital autocorrelator
and photon counter.
To estimate the Doppler scaling factor, a periodic property of the received preamble via a bank of autocorrelators
is used as shown in Fig.