optical fibres
preferred label: الیاف نوری @fa
type: Concept
related: Bragg grating

diffraction grating
preferred label: توری پراش @fa
type: Concept
narrower: Bragg grating

holographic grating
preferred label: توری تمام‌نگاری @fa
type: Concept
related: Bragg grating

Bragg grating
alternative label: fibre Bragg grating
related: holographic grating
related: optical fibres
broader: diffraction grating
preferred label: توری براگ @fa
type: Concept