STEPPED OPTICAL ATTENUATOR Russian patent published in 2023 - IPC H01P1/22 

FIELD: optics.

SUBSTANCE: invention relates to optical attenuators for the implementation of preset attenuation of the emission intensity in optical apparatus, in particular, in fibre-optic communication lines, communication optical equipment, and laser equipment. Stepped optical attenuator consists of N series-connected single attenuators located on a single optical axis, wherein each nth single attenuator, n≤N, is characterised by the value of the optical power loss limit P_lim(n)=P_in(n)-P_out(n), wherein P_in(n) is the emission power at the input of the nth stage, P_out(n) is the emission power at the output of the nth stage. The attenuation coefficient K_att(n) at the nth stage is set by the formula K_att(n)=10 lg((P_in(n)-P_lim(n))/P_in(n)).

EFFECT: higher maximum input power of the attenuator with the maintained level of stability of the characteristics thereof.

2 cl, 3 tbl