About: gain medium

Premodifier: gain
Head noun: medium

Same concepts
http://dbpedia.org/resource/Active_laser_medium

Broader concepts

label	provenance	confidence
optical element	isap:449375746	0.515638
fiber	isap:122909737	0.337716
laser	isap:115733363	0.313506

Narrower concepts

label	provenance	confidence
semiconductor laser	isap:153710255	0.522271
laser	isap:153710254	0.213097
fiber	isap:163356972	0.187799