Fiber Optic Interference Sensor Securelight-1LP is a system which allows detection and location of mechanical disorders influencing on the sensor part of the system. Sensor system is built on the basis of two Mach – Zehnder interferometers using the same optical fibers but with the opposite direction of light propagation. Interference sensor is based on 3 fibers of single mode optical fiber.
There are two sections of optical fibers in the system. Section sensitive to external disturbances consist of optical fibers which are arms of the interferometer and transceiver fibers transmitting output signals from the interferometers and ensuring transmission of power to optical interferometers.
External disturbances are located and alarm is generated based on analysis of interference contrast and by appropriate signal processing. In addition, the system through the use of appropriate modulation of the power emission, automatically adapts to environmental changes affecting its sensitive part providing automatic compensation for low-frequency background signals.
Interference sensor system is able to monitor zones up to 49 kilometers long and to locate a place of disturbances with accuracy to several meters by dividing the protected zone into smaller safety zones. There is also a possibility to configure location of detection zones.