photonic band gap
type: Concept
preferred label: گاف نواری فوتونی @fa
related: holey fibres

photonic crystal
type: Concept
preferred label: بلور فوتونیکی @fa
related: holey fibres

holey fibres
type: Concept
alternative label: photonic crystal fibres
broader: optical fibres
preferred label: الیاف روزنه‌دار @fa
related: photonic band gap
related: photonic crystal
scope note: photonic crystal fibres

optical fibres
type: Concept
narrower: holey fibres
preferred label: الیاف نوری @fa