optical communication equipment
type: Concept
preferred label: تجهیزات ارتباط نوری @fa
related: optical attenuator

optical losses
type: Concept
preferred label: تلفات نوری @fa
related: optical attenuator

optical attenuator
type: Concept
alternative label: variable optical attenuator
broader: optical element
broader: attenuator
preferred label: تضعیف‌کننده نوری @fa
related: optical communication equipment
related: waveguide attenuator
related: optical losses
scope note: variable optical attenuator

optical element
type: Concept
narrower: optical attenuator
preferred label: عنصر نوری @fa

waveguide attenuator
type: Concept
preferred label: تضعیف‌کننده موج‌بر @fa
related: optical attenuator

attenuator
type: Concept
narrower: optical attenuator
preferred label: تضعیف‌کننده @fa