METHOD OF PROTECTION OF ACOUSTIC VOICE DATA FROM RELATED TRANSMISSION OVER OPTICAL LINKS Russian patent published in 2017 - IPC H04B10/00 

FIELD: radio engineering, communication.

SUBSTANCE: registration of leakage of acoustic speech information in FO changes the operating mode of the optical radiation source - laser that specifies the activation period T of laser conforming to the condition T>1/2f_l, where f_l - the lower frequency of the acoustic voice data signal propagating in FO, and the period T includes the laser shutdown time ∆T - duty cycle and laser operating time ∆t, conforming to the condition Δt<1/2ƒ_u, where ƒ_u - upper frequency of the acoustic voice data signal propagating in FO, within which the pulse repetition period τ conforms to the normal mode. If there is no leakage of acoustic voice data in FO the normal operating mode of the laser is set.

EFFECT: elimination of acoustic voice data induced in optical communication lines with the specified quality at the expense of violation of the signal recovery condition specified by Nyquist theorem.

2 cl, 3 dwg