About: http://webisa.webdatacommons.org/359583226

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	Lenses, diffraction gratings and other optical elements can be integrated to improve the coupling efficiency or provide frequency discrimination when desired.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk