DEVICE FOR INSPECTING FIBRE-OPTIC LINES Russian patent published in 2014 - IPC H04B10/07 

FIELD: physics, optics.

SUBSTANCE: invention relates to devices for monitoring losses in fibre-optic lines and can be used as a universal tool for protecting confidential information transmitted over an uncontrolled territory. The device includes a transmitting optoelectronic module, the input of which is connected to the output of a digital generator, and series-connected receiving optoelectronic module, automatic gain control amplifier, band-pass filter, level detector, microcontroller and signalling device; the device further includes an optical switch, first and second optical couplers, a matching device, the output of which is connected to the second input of the automatic gain control amplifier and the input is connected to the first output of the microcontroller, the second output of which is connected to the control input of the optical switch, the optical output of which is the output of the device to the fibre-optic line, and the optical input is connected to the output of the first optical coupler, the first input of which is the input of the device, and the second input is connected to the output of the transmitting optoelectronic module.

EFFECT: designing a device for inspecting a fibre-optic line independent of information signal parameters: transmission speed and coding method.

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