About: http://webisa.webdatacommons.org/101987398

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	Nonlinear frequency conversion in crystalline materials is used to provide a desired frequency which is not conveniently available from an existing source such as an existing laser.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com