About: http://webisa.webdatacommons.org/334211739

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Second, before the sample, the intensity (in principle other quantities such as frequency, phase and polarization as well) of the pump beam is modulated at a high frequency f (>1 MHz), while the probe beam is originally un-modulated.
http://www.w3.org/ns/prov#wasQuotedFrom	pubmedcentralcanada.ca